491:
872:. Eta is a blue-white main sequence star of spectral type B9V that was suspected of being variable, and is located just over 700 light-years away. Eta has a magnitude of 4.7 and is a yellow giant star of spectral type G8.5III around 218 light-years distant, which has evolved off the main sequence and is expanding and cooling on its way to becoming a red giant. Calculations of its mass indicate it was most likely a white A-type main sequence star for most of its existence, around twice the mass of the Sun. A planet,
3798:
2956:
4490:
52:
696:
4514:
4466:
4502:
4478:
826:. These systems are characterised by frequent eruptions and less frequent supereruptions. The former are smooth, while the latter exhibit short "superhumps" of heightened activity. One of the brightest dwarf novae in the sky, it has a baseline magnitude of 14.4 and can brighten to magnitude 8.4 during peak activity.
2309:
Brandão, I. M.; Dogan, G.; Christensen-Dalsgaard, J.; Cunha, M. S.; Bedding, T. R.; Metcalfe, T. S.; Kjeldsen, H.; Bruntt, H.; Arentoft, T. (2011). "The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and
Neptune-mass planets".
783:, a white sub-giant star of magnitude 2.9, situated 72 light-years from Earth. Of spectral type F0IV, it is beginning to cool and enlarge as it uses up its supply of hydrogen. It is twice as massive and 3.3 times as wide as the Sun and 26 times more luminous. A line drawn between Alpha Hydri and
767:
becoming exhausted. It is the nearest subgiant star to the Sun and one of the oldest stars in the solar neighbourhood. Thought to be between 6.4 and 7.1 billion years old, this star bears some resemblance to what the Sun may look like in the far distant future, making it an object of interest to
952:
surrounded by shells resembling rose petals, located around 345 million light years from the Solar System. Unusually, it has cohorts of globular clusters of three distinct ages suggesting bouts of post-starburst formation following a merger with another galaxy. The constellation also contains a
919:
is a star of magnitude 8.37. It is a yellow main sequence star of spectral type G8V a little cooler and smaller than the Sun around 143 light-years away. It has two planets that are around 12 and 13.5 times as massive as the Earth with periods of just under 12 and 34 days respectively.
616:
to the south; Lacaille had shortened Hydrus' tail to make space for this last constellation he had drawn up. Covering 243 square degrees and 0.589% of the night sky, it ranks 61st of the 88 constellations in size. The three-letter abbreviation for the constellation, as adopted by the
861:, is divisible in binoculars. Around 476 light-years distant, Pi is a red giant of spectral type M1III that varies between magnitudes 5.52 and 5.58. Pi is an orange giant of spectral type K2III and shining with a magnitude of 5.7, around 488 light-years from Earth.
913:). Orbiting about 0.5 AU from its star, it has a minimum mass 3.37 times that of Jupiter and a period of around 133 days. The system is a complex one as the faint star GJ 3021B orbits at a distance of 68 AU; it is a red dwarf of spectral type M4V.
895:, which has seven planets, plus possibly an additional two for a total of nine—as of 2012 more than any other system to date, including the Solar System. Lying around 127 light-years (39 parsecs) from the Earth, it has an apparent magnitude of 7.33.
723:
Alpha through to Tau in 1756. Of these, he used the designations Eta, Pi and Tau twice each, for three sets of two stars close together, and omitted
Omicron and Xi. He assigned Rho to a star that subsequent astronomers were unable to find.
2016:
Setiawan, J.; Rodmann, J.; Da Silva, L.; Hatzes, A. P.; Pasquini, L.; Von Der Lühe, O.; De
Medeiros, J. R.; Döllinger, M. P.; et al. (2005). "A Substellar Companion Around the Intermediate-mass Giant star HD 11977".
806:. It is around 1.5 to 2 times as massive as the Sun, and has expanded to about 60 times the Sun's diameter. It shines with about 655 times the luminosity of the Sun. Located 3° northeast of Gamma is the
718:
marking the head, Gamma the chest and a number of stars that were later allocated to Tucana, Reticulum, Mensa and
Horologium marking the body and tail. Lacaille charted and designated 20 stars with the
2358:
Maybhate, Aparna; Goudfrooij, Paul; Schweizer, François; Puzia, Thomas; Carter, David (2007). "Evidence for Three
Subpopulations of Globular Clusters in the Early-Type Poststarburst Shell Galaxy AM".
976:. It has a magnitude of 11.59 and is thought to be over 12 billion years old. Two stars, HD 24188 of magnitude 6.3 and HD 24115 of magnitude 9.0, lie nearby in its foreground.
4331:
4251:
3528:
2256:
Chauvin, G.; Lagrange, A.-M.; Udry, S.; Mayor, M. (2007). "Characterization of the Long-period
Companions of the Exoplanet Host Stars: HD 196885, HD 1237 and HD 27442".
2203:
Naef, D.; Mayor, M.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Burnet, M. (2001). "The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets".
4296:
4115:
4291:
1646:
1620:
3834:
1912:
1860:
4266:
4241:
1990:
1964:
1465:
2177:
4326:
675:"beneath effulgent Antarctic Skies", highlighting his knowledge of the southern constellations from whaling voyages. A line drawn between the long axis of the
714:
Keyzer and de
Houtman assigned fifteen stars to the constellation in their Malay and Madagascan vocabulary, with a star that would be later designated as
940:
in the late 19th century. The object at the coordinate Dreyer observed is no longer there, and is now a mystery. It was very likely to have been a faint
548:, "The Water Snake", it representing a type of snake encountered on the expedition rather than a mythical creature. The French explorer and astronomer
4544:
3492:
1399:
1438:
Lost Stars: Lost, Missing and
Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others
3521:
2990:
645:
coordinates are between −57.85° and −82.06°. As one of the deep southern constellations, it remains below the horizon at latitudes north of the
4108:
3827:
408:
and it first appeared on a 35-cm (14 in) diameter celestial globe published in late 1597 (or early 1598) in
Amsterdam by Plancius and
1498:; Metcalfe, T. S.; Kjeldsen, H.; Bruntt, H.; et al. (March 2011). "Asteroseismic Modelling of the Solar-type Subgiant Star β Hydri".
530:. It first appeared on a 35-cm (14 in) diameter celestial globe published in late 1597 (or early 1598) in Amsterdam by Plancius with
3514:
827:
4101:
3801:
933:
3820:
3485:
2511:
2478:
2451:
2422:
2342:
1571:
1449:
1374:
1340:
1313:
1248:
1221:
2983:
522:
4366:
831:
4539:
3478:
2567:
618:
197:
191:
1269:
905:—a star very like the Sun—around 57 light-years distant with a spectral type G8V and magnitude of 6.7. It has a
2976:
2781:
802:
star, pulsating between magnitudes 3.26 and 3.33. Observations over five years were not able to establish its
3000:
393:
4371:
2776:
830:
is another close binary system composed of a low-mass star and a strongly magnetic white dwarf. Known as a
626:
436:, a much larger constellation that represents a female water snake. It remains below the horizon for most
4341:
4216:
3750:
3366:
2592:
2019:
4456:
4439:
4030:
3610:
3211:
3096:
1009:
597:
302:
1395:"On Frederick de Houtman's Catalogue of Southern Stars, and the Origin of the Southern Constellations"
3550:
3011:
2719:
799:
769:
549:
451:
421:
622:
4351:
4346:
4336:
4226:
4181:
4166:
4146:
4136:
4070:
3680:
3670:
3555:
3376:
3206:
3186:
3026:
1938:
1886:
593:
298:
544:
of 1603. De
Houtman included it in his southern star catalogue the same year under the Dutch name
3943:
3919:
3730:
3725:
3620:
3459:
3326:
3321:
3316:
3126:
3106:
2587:
709:
605:
513:
401:
314:
56:
20:
534:. The first depiction of this constellation in a celestial atlas was in the German cartographer
4361:
4281:
4236:
4221:
4206:
4156:
4015:
3986:
3842:
3765:
3735:
3675:
3650:
3645:
3640:
3590:
3560:
3396:
3381:
3336:
3196:
3161:
3151:
3146:
3091:
3066:
3031:
2930:
2920:
2737:
2576:
2535:
1563:
1112:
989:
965:
937:
748:
490:
2530:
2503:
2468:
2332:
1364:
1330:
1305:
1238:
1089:
4386:
4286:
4261:
4196:
4186:
4141:
4124:
4045:
4035:
3904:
3785:
3720:
3705:
3700:
3695:
3685:
3660:
3575:
3436:
3306:
3291:
3271:
3256:
3251:
3246:
3226:
3216:
3176:
3041:
2938:
2876:
2439:
2412:
2151:
589:
561:
433:
306:
219:
24:
2279:
2226:
2095:
2042:
1805:
1555:
1521:
4419:
4171:
4151:
4080:
3981:
3914:
3894:
3431:
3311:
3261:
3201:
2560:
2377:
2275:
2222:
2091:
2038:
1832:
1801:
1699:
1517:
1408:
1278:
1264:
835:
517:
405:
205:
31:
2126:
1063:
8:
4518:
4211:
3861:
3690:
3565:
3411:
3236:
3036:
1335:. SAS and Elite Forces Survival Guide. London, United Kingdom: Amber Books. p. 201.
658:
654:
650:
646:
565:
437:
2381:
1836:
1703:
1412:
1366:
Hartung's Astronomical Objects for Southern Telescopes: A Handbook for Amateur Observers
1282:
1034:
957:, which lies edge on to observers on Earth and is readily viewed in amateur telescopes.
4506:
4494:
4306:
2393:
2367:
2311:
2291:
2265:
2238:
2212:
2107:
2081:
2054:
2028:
1717:
1689:
1533:
1507:
1298:
728:
621:
in 1922, is "Hyi". The official constellation boundaries, as set by Belgian astronomer
444:
332:
888:
4381:
4356:
4256:
4201:
4123:
2611:
2507:
2496:
2474:
2447:
2418:
2338:
1712:
1677:
1567:
1556:
1445:
1370:
1336:
1309:
1244:
1217:
973:
881:
764:
760:
720:
429:
215:
2397:
2295:
2242:
2111:
1736:
1721:
1594:
1537:
1175:
4470:
4376:
4311:
3740:
3630:
3341:
3136:
2385:
2283:
2230:
2099:
2058:
2046:
1840:
1707:
1525:
1416:
993:
752:
744:
359:
119:
87:
2470:
1001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers
2417:(3rd ed.). Port Melbourne, Victoria: Cambridge University Press. p. 48.
2103:
2050:
1529:
1145:
803:
4534:
4321:
3635:
3141:
2959:
2553:
2287:
2234:
981:
929:
880:
was discovered in 2005, orbiting around Eta every 711 days at a distance of 1.93
847:
662:
630:
531:
509:
409:
397:
157:
4276:
4191:
3966:
3938:
3870:
3131:
3071:
3061:
2968:
1590:
823:
269:
822:
and another star, the former drawing off matter from the latter into a bright
4528:
4316:
4271:
4246:
4231:
2639:
1821:"Discovery of Quasi-periodic Oscillations in the AM Herculis Object BL Hydri"
1551:
1421:
1394:
1390:
949:
910:
784:
389:
279:
72:
853:
There are two notable optical double stars in Hydrus. Pi Hydri, composed of
51:
4482:
4176:
4040:
3843:
The 41 additional constellations added in the 16th, 17th and 18th centuries
3276:
2835:
2807:
2674:
985:
906:
902:
873:
535:
495:
413:
2545:
508:
Hydrus was one of the twelve constellations established by the astronomer
4075:
3605:
3600:
3595:
3401:
3086:
3081:
3076:
2699:
2669:
2659:
2634:
2629:
2619:
2217:
2072:
Tuomi, Mikko (April 2012). "Evidence for 9 planets in the 10180 system".
2033:
1819:
Middleditch, John; Imamura, James N.; Steiman-Cameron, Thomas Y. (1997).
1673:
1495:
1171:
1141:
1059:
1000:. Most of the cloud is located in the neighbouring constellation Tucana.
819:
815:
791:
780:
715:
684:
642:
557:
540:
527:
500:
455:
417:
173:
3470:
2334:
The Star Atlas Companion: What You Need to Know about the Constellations
1240:
The Star Atlas Companion: What You Need to Know about the Constellations
775:
Located at the northern edge of the constellation and just southwest of
412:. The first depiction of this constellation in a celestial atlas was in
4301:
4161:
3884:
3780:
3775:
3770:
3570:
3426:
3421:
3406:
3116:
2817:
2771:
2709:
2704:
2664:
2654:
2649:
2644:
2624:
869:
865:
811:
740:
736:
732:
695:
680:
666:
471:
447:
336:
261:
2540:
2308:
1493:
1369:. Cambridge, United Kingdom: Cambridge University Press. p. 259.
887:
Three other systems have been found to have planets, most notably the
4424:
4414:
3996:
3976:
3957:
3948:
3715:
3655:
3615:
3446:
3356:
3301:
3281:
3241:
3166:
3101:
2812:
2799:
2694:
2689:
2446:. Cambridge, United Kingdom: Cambridge University Press. p. 57.
997:
858:
854:
795:
671:
601:
520:, who had sailed on the first Dutch trading expedition, known as the
475:
459:
319:
232:
3585:
3536:
3051:
1678:"Long-term Photometry and Periods for 261 Nearby Pulsating M Giants"
1494:
Brandão, I. M.; Doğan, G.; Christensen-Dalsgaard, J.; Cunha, M. S.;
474:
in the heavens. Four star systems in Hydrus have been found to have
4020:
3755:
3665:
3371:
3181:
3121:
2915:
2853:
2755:
2750:
2727:
2684:
2679:
2389:
1845:
1820:
1766:
1444:: The McDonald & Woodward Publishing Company. pp. 176–77.
1441:
969:
954:
945:
916:
892:
839:
807:
798:
of spectral type M2III located 214 light-years from Earth. It is a
776:
756:
739:
and 181% of the Sun's radius, with more than three times the Sun's
479:
467:
2372:
2316:
2270:
2086:
1694:
1512:
988:
of stars that is an outlying component on the eastern edge of the
3991:
3971:
3760:
3745:
3538:
3391:
3386:
3361:
3231:
2894:
2889:
2884:
2848:
2843:
2745:
2502:. Cambridge, United Kingdom: Cambridge University Press. p.
1818:
1792:
Vogt, N. (1974). "Photometric Study of the Dwarf Nova VW Hydri".
977:
898:
877:
512:
from the observations of the southern sky by the Dutch explorers
2357:
1267:(1922). "The New International Symbols for the Constellations".
683:
and then extended 4.5 times will mark a point due south. Hydrus
4429:
4060:
4055:
4050:
4025:
4010:
4005:
3929:
3924:
3889:
3580:
3441:
3416:
3346:
3331:
3296:
3191:
3171:
3056:
3046:
3016:
2934:
2924:
2867:
961:
613:
609:
323:
310:
294:
1304:. Montreal, Quebec: McGill-Queen's University Press. pp.
727:
Beta Hydri, the brightest star in Hydrus, is a yellow star of
4065:
3909:
3625:
3351:
3286:
3111:
2910:
2015:
1676:; Kiss, L. L.; Moon, T. T.; Szeidl, B.; Kjeldsen, H. (2009).
941:
843:
573:
4434:
3879:
3856:
3710:
3266:
3156:
3021:
2602:
763:
star than the Sun, with the supply of hydrogen fuel at its
699:
The constellation Hydrus as it can be seen by the naked eye
676:
560:
of the southern skies, distinguishing it from the feminine
425:
377:
368:
137:
128:
105:
96:
4477:
1362:
1216:. London, United Kingdom: Aurum Press. pp. 385, 391.
1214:
The Constellations: An Enthusiast's Guide to the Night Sky
972:
is an outlying component of the galaxy, and contains many
936:
was a deep-sky object discovered by the Danish astronomer
432:
in 1756. Its name means "male water snake", as opposed to
23:. Not to be confused with the equatorial constellation of
2536:
The Deep Photographic Guide to the Constellations: Hydrus
2493:
2410:
625:
in 1930, are defined by a polygon of 12 segments. In the
463:
2255:
768:
astronomers. It is also the closest bright star to the
4454:
380:
108:
1671:
1211:
482:, which could bear up to nine planetary companions.
374:
371:
134:
131:
102:
99:
2202:
1328:
864:Eta Hydri is the other optical double, composed of
790:In the southeastern corner of the constellation is
365:
362:
343:Best visible at 21:00 (9 p.m.) during the month of
125:
122:
93:
90:
2495:
1297:
16:Constellation in the southern celestial hemisphere
1773:. American Association of Variable Star Observers
1682:Monthly Notices of the Royal Astronomical Society
1562:(2nd ed.). New York City: Springer. p.
1400:Monthly Notices of the Royal Astronomical Society
1389:
450:, also the closest reasonably bright star to the
396:. It was one of twelve constellations created by
4526:
2998:
846:emissions to the frequency of the white dwarf's
2184:. Centre de Données astronomiques de Strasbourg
2158:. Centre de Données astronomiques de Strasbourg
1997:. Centre de Données astronomiques de Strasbourg
1971:. Centre de Données astronomiques de Strasbourg
1919:. Centre de Données astronomiques de Strasbourg
1867:. Centre de Données astronomiques de Strasbourg
1653:. Centre de Données astronomiques de Strasbourg
1627:. Centre de Données astronomiques de Strasbourg
1558:The Observer's Year: 366 Nights of the Universe
1472:. Centre de Données astronomiques de Strasbourg
653:, and is circumpolar at latitudes south of the
1550:
4109:
3828:
3522:
3486:
2984:
2561:
1585:
1583:
1489:
1487:
1322:
948:, known as the White Rose Galaxy, is a giant
454:. Pulsating between magnitude 3.26 and 3.33,
2834:
2337:. New York City: Springer. pp. 251–52.
2324:
1136:
1134:
814:of the SU Ursae Majoris type. It is a close
504:, its first appearance in a celestial atlas.
420:of 1603. The French explorer and astronomer
2575:
2249:
2118:
1358:
1356:
1354:
1352:
4116:
4102:
3835:
3821:
3529:
3515:
3493:
3479:
2991:
2977:
2568:
2554:
2437:
2431:
1760:
1758:
1728:
1580:
1484:
1029:
1027:
1025:
968:extends into Hydrus. The globular cluster
588:Irregular in shape, Hydrus is bordered by
50:
30:"Hyi" redirects here. For other uses, see
3500:
2798:
2487:
2371:
2315:
2269:
2216:
2085:
2032:
1844:
1711:
1693:
1544:
1511:
1420:
1295:
1230:
1176:"Lacaille's Southern Planisphere of 1756"
1131:
787:is bisected by the south celestial pole.
633:coordinates of these borders lie between
4545:Constellations listed by Petrus Plancius
2473:. New York City: Springer. p. 373.
2440:"The Age Distribution of Cloud Clusters"
2196:
1791:
1349:
1243:. New York City: Springer. p. 251.
694:
494:Hydrus (lower right) in an extract from
489:
2330:
1755:
1263:
1257:
1236:
1022:
834:or AM Herculis variable, these produce
4527:
2466:
1435:
1429:
1212:Motz, Lloyd; Nathanson, Carol (1991).
1207:
1205:
1203:
1201:
1199:
1197:
4097:
3816:
3510:
3474:
2972:
2549:
2411:Ellyard, David; Tirion, Wil (2008) .
2071:
2065:
1363:Malin, David; Frew, David J. (1995).
876:, greater than 6.5 times the mass of
735:from Earth. It has about 104% of the
2498:Cambridge Guide to Stars and Planets
2494:Moore, Patrick; Tirion, Wil (1997).
2124:
1064:"Johann Bayer's Southern Star Chart"
842:emissions and intense soft and hard
4307:Psalterium Georgianum/Harpa Georgii
1764:
1194:
1170:
1140:
1110:
1058:
923:
576:the name to Hydrus for his revised
13:
4202:Honores Friderici/Gloria Frederici
2127:"Rich exoplanet system discovered"
1621:"LTT 1059—High Proper-motion Star"
1113:"Frederick de Houtman's Catalogue"
583:
564:. The French name was retained by
14:
4556:
2524:
2125:Gill, Victoria (24 August 2010).
1943:International Variable Star Index
1891:International Variable Star Index
1734:
1589:
759:. As such, it is a slightly more
4512:
4500:
4488:
4476:
4464:
4127:(including Ptolemy's Argo Navis)
3797:
3796:
2955:
2954:
2531:Chandra information about Hydrus
2178:"HD 1237—Pre-main sequence Star"
1713:10.1111/j.1365-2966.2009.15588.x
1035:"Hydrus, Constellation Boundary"
619:International Astronomical Union
358:
250:Stars within 10.00 pc (32.62 ly)
118:
86:
3853:Vespucci or Corsalius early 16c
2460:
2404:
2351:
2302:
2170:
2144:
2009:
1983:
1957:
1931:
1905:
1879:
1853:
1812:
1785:
1665:
1639:
1613:
1458:
1383:
1289:
1146:"Hydrus—the Lesser Water Snake"
687:at midnight around 26 October.
612:to the northwest and west, and
1164:
1104:
1082:
1052:
443:The brightest star is the 2.8-
331:Visible at latitudes between +
1:
2438:Westerlund, Bengt E. (1997).
1015:
850:—in this case 113.6 minutes.
755:of 'IV' indicating this is a
462:60 times the diameter of the
4401:obsolete constellation names
3537:48 constellations listed by
2074:Astronomy & Astrophysics
2020:Astronomy & Astrophysics
1995:SIMBAD Astronomical Database
1969:SIMBAD Astronomical Database
1917:SIMBAD Astronomical Database
1865:SIMBAD Astronomical Database
1651:SIMBAD Astronomical Database
1625:SIMBAD Astronomical Database
1500:Astronomy & Astrophysics
1470:SIMBAD Astronomical Database
1329:Stilwell. Alexander (2010).
974:RR Lyrae-type variable stars
627:equatorial coordinate system
7:
4342:Sceptrum et Manus Iustitiae
2593:Hydrus in Chinese astronomy
2467:Bakich, Michael E. (2010).
2331:Bagnall, Philip M. (2012).
2104:10.1051/0004-6361/201118518
2051:10.1051/0004-6361:200500133
1647:"Gamma Hydri—Variable Star"
1530:10.1051/0004-6361/201015370
1237:Bagnall, Philip M. (2012).
1092:. Chandra X-ray Observatory
1003:
928:Hydrus contains only faint
690:
578:Coelum Australe Stelliferum
556:on the 1756 version of his
10:
4561:
2782:WISEPC J014807.25−720258.7
2288:10.1051/0004-6361:20067046
2258:Astronomy and Astrophysics
2235:10.1051/0004-6361:20010841
2205:Astronomy and Astrophysics
1965:"Eta 1Hydri—Variable Star"
1794:Astronomy and Astrophysics
1300:Herman Melville: Stargazer
1010:Hydrus (Chinese astronomy)
818:system that consists of a
707:
485:
29:
18:
4410:
4395:
4132:
4093:
3848:
3812:
3794:
3546:
3506:
3455:
3007:
2952:
2903:
2875:
2866:
2830:
2794:
2764:
2736:
2718:
2610:
2601:
2583:
1296:Zimmerman, Brett (1998).
550:Nicolas Louis de Lacaille
422:Nicolas Louis de Lacaille
400:from the observations of
329:
288:
278:
268:
257:
249:
241:
230:
214:
204:
190:
182:
172:
156:
148:
81:
71:
63:
49:
44:
4337:Sceptrum Brandenburgicum
3001:88 modern constellations
1893:. AAVSO. 18 January 2010
1743:. University of Illinois
1601:. University of Illinois
751:of G2 IV, with the
703:
242:Stars brighter than 3.00
4540:Southern constellations
4125:Obsolete constellations
3876:Keyser & de Houtman
3460:Lists of constellations
2588:List of stars in Hydrus
2577:Constellation of Hydrus
2280:2007A&A...475..723C
2227:2001A&A...375..205N
2096:2012A&A...543A..52T
2043:2005A&A...437L..31S
1945:. AAVSO. 4 January 2010
1806:1974A&A....36..369V
1522:2011A&A...527A..37B
1436:Wagman, Morton (2003).
747:of this star matches a
710:List of stars in Hydrus
514:Pieter Dirkszoon Keyser
470:, one of the brightest
402:Pieter Dirkszoon Keyser
57:List of stars in Hydrus
21:Hydrus (disambiguation)
4362:Telescopium Herschelii
2931:Large Magellanic Cloud
2921:Small Magellanic Cloud
2414:The Southern Sky Guide
1422:10.1093/mnras/77.5.414
1090:"Hydrus (Water Snake)"
990:Small Magellanic Cloud
966:Large Magellanic Cloud
938:John Louis Emil Dreyer
749:stellar classification
700:
505:
4287:Officina Typographica
3501:Constellation history
2444:The Magellanic Clouds
1825:Astrophysical Journal
1265:Russell, Henry Norris
800:semi-regular variable
698:
493:
424:charted the brighter
2541:The clickable Hydrus
2360:Astronomical Journal
1765:BSJ (19 July 2010).
984:and a young, bright
770:south celestial pole
518:Frederick de Houtman
452:south celestial pole
406:Frederick de Houtman
19:For other uses, see
4212:Globus Aerostaticus
3862:Triangulum Australe
3412:Triangulum Australe
2382:2007AJ....134.1729M
1837:1997ApJ...489..912M
1704:2009MNRAS.400.1945T
1413:1917MNRAS..77..414K
1283:1922PA.....30..469R
659:Southern Hemisphere
651:Northern Hemisphere
478:to date, including
466:. Lying near it is
438:Northern Hemisphere
41:
1039:The Constellations
980:is composed of an
960:Located mostly in
882:astronomical units
729:apparent magnitude
721:Bayer designations
701:
604:to the northeast,
592:to the southeast,
506:
430:Bayer designations
178:−57.85° to −82.06°
39:
4452:
4451:
4448:
4447:
4382:Turdus Solitarius
4357:Taurus Poniatovii
4352:Tarandus/Rangifer
4257:Machina Electrica
4089:
4088:
3808:
3807:
3468:
3467:
2966:
2965:
2948:
2947:
2862:
2861:
2826:
2825:
2790:
2789:
2513:978-0-521-58582-8
2480:978-1-4419-1777-5
2453:978-0-521-48070-3
2424:978-0-521-71405-1
2344:978-1-4614-0830-7
1573:978-1-85233-884-8
1451:978-0-939923-78-6
1391:Knobel, Edward B.
1376:978-0-521-55491-6
1342:978-1-908696-06-9
1315:978-0-7735-1786-8
1270:Popular Astronomy
1250:978-1-4614-0830-7
1223:978-1-85410-088-7
572:, while Lacaille
523:Eerste Schipvaart
352:
351:
4552:
4517:
4516:
4515:
4505:
4504:
4503:
4493:
4492:
4491:
4481:
4480:
4469:
4468:
4467:
4460:
4377:Triangulum Minus
4312:Quadrans Muralis
4118:
4111:
4104:
4095:
4094:
3837:
3830:
3823:
3814:
3813:
3800:
3799:
3741:Piscis Austrinus
3631:Corona Australis
3531:
3524:
3517:
3508:
3507:
3495:
3488:
3481:
3472:
3471:
3342:Piscis Austrinus
3137:Corona Australis
2993:
2986:
2979:
2970:
2969:
2958:
2957:
2873:
2872:
2832:
2831:
2796:
2795:
2608:
2607:
2570:
2563:
2556:
2547:
2546:
2518:
2517:
2501:
2491:
2485:
2484:
2464:
2458:
2457:
2435:
2429:
2428:
2408:
2402:
2401:
2375:
2355:
2349:
2348:
2328:
2322:
2321:
2319:
2306:
2300:
2299:
2273:
2253:
2247:
2246:
2220:
2218:astro-ph/0106255
2200:
2194:
2193:
2191:
2189:
2174:
2168:
2167:
2165:
2163:
2148:
2142:
2141:
2139:
2137:
2122:
2116:
2115:
2089:
2069:
2063:
2062:
2036:
2034:astro-ph/0505510
2013:
2007:
2006:
2004:
2002:
1987:
1981:
1980:
1978:
1976:
1961:
1955:
1954:
1952:
1950:
1935:
1929:
1928:
1926:
1924:
1909:
1903:
1902:
1900:
1898:
1883:
1877:
1876:
1874:
1872:
1857:
1851:
1850:
1848:
1816:
1810:
1809:
1789:
1783:
1782:
1780:
1778:
1762:
1753:
1752:
1750:
1748:
1732:
1726:
1725:
1715:
1697:
1669:
1663:
1662:
1660:
1658:
1643:
1637:
1636:
1634:
1632:
1617:
1611:
1610:
1608:
1606:
1587:
1578:
1577:
1561:
1548:
1542:
1541:
1515:
1491:
1482:
1481:
1479:
1477:
1462:
1456:
1455:
1433:
1427:
1426:
1424:
1387:
1381:
1380:
1360:
1347:
1346:
1326:
1320:
1319:
1303:
1293:
1287:
1286:
1261:
1255:
1254:
1234:
1228:
1227:
1209:
1192:
1191:
1189:
1187:
1182:. self-published
1168:
1162:
1161:
1159:
1157:
1152:. self-published
1138:
1129:
1128:
1126:
1124:
1119:. self-published
1108:
1102:
1101:
1099:
1097:
1086:
1080:
1079:
1077:
1075:
1070:. self-published
1056:
1050:
1049:
1047:
1045:
1031:
994:satellite galaxy
930:deep-sky objects
924:Deep-sky objects
753:luminosity class
665:mentions it and
640:
636:
568:in 1776 for his
387:
386:
383:
382:
379:
376:
373:
370:
367:
364:
346:
168:
164:
144:
143:
140:
139:
136:
133:
130:
127:
124:
115:
114:
111:
110:
107:
104:
101:
98:
95:
92:
54:
42:
38:
4560:
4559:
4555:
4554:
4553:
4551:
4550:
4549:
4525:
4524:
4523:
4513:
4511:
4501:
4499:
4489:
4487:
4475:
4465:
4463:
4455:
4453:
4444:
4406:
4391:
4322:Robur Carolinum
4128:
4122:
4085:
3844:
3841:
3804:
3790:
3636:Corona Borealis
3542:
3535:
3502:
3499:
3469:
3464:
3451:
3142:Corona Borealis
3003:
2997:
2967:
2962:
2944:
2899:
2858:
2822:
2786:
2777:SMSS J0313−6708
2760:
2732:
2714:
2597:
2579:
2574:
2527:
2522:
2521:
2514:
2492:
2488:
2481:
2465:
2461:
2454:
2436:
2432:
2425:
2409:
2405:
2356:
2352:
2345:
2329:
2325:
2307:
2303:
2254:
2250:
2201:
2197:
2187:
2185:
2176:
2175:
2171:
2161:
2159:
2152:"HD 10180—Star"
2150:
2149:
2145:
2135:
2133:
2123:
2119:
2070:
2066:
2014:
2010:
2000:
1998:
1989:
1988:
1984:
1974:
1972:
1963:
1962:
1958:
1948:
1946:
1937:
1936:
1932:
1922:
1920:
1911:
1910:
1906:
1896:
1894:
1885:
1884:
1880:
1870:
1868:
1859:
1858:
1854:
1817:
1813:
1790:
1786:
1776:
1774:
1763:
1756:
1746:
1744:
1733:
1729:
1670:
1666:
1656:
1654:
1645:
1644:
1640:
1630:
1628:
1619:
1618:
1614:
1604:
1602:
1588:
1581:
1574:
1549:
1545:
1492:
1485:
1475:
1473:
1464:
1463:
1459:
1452:
1434:
1430:
1388:
1384:
1377:
1361:
1350:
1343:
1332:Crisis Survival
1327:
1323:
1316:
1294:
1290:
1262:
1258:
1251:
1235:
1231:
1224:
1210:
1195:
1185:
1183:
1169:
1165:
1155:
1153:
1139:
1132:
1122:
1120:
1109:
1105:
1095:
1093:
1088:
1087:
1083:
1073:
1071:
1057:
1053:
1043:
1041:
1033:
1032:
1023:
1018:
1006:
982:emission nebula
953:spiral galaxy,
926:
848:rotation period
737:mass of the Sun
712:
706:
693:
663:Herman Melville
638:
634:
631:right ascension
623:Eugène Delporte
586:
584:Characteristics
532:Jodocus Hondius
510:Petrus Plancius
488:
428:and gave their
410:Jodocus Hondius
398:Petrus Plancius
361:
357:
344:
341:
322:
318:
313:
309:
305:
301:
297:
290:
270:Messier objects
222:
166:
162:
158:Right ascension
152:the water snake
121:
117:
89:
85:
59:
35:
28:
17:
12:
11:
5:
4558:
4548:
4547:
4542:
4537:
4522:
4521:
4509:
4497:
4485:
4473:
4450:
4449:
4446:
4445:
4443:
4442:
4437:
4432:
4427:
4422:
4420:Phoenicopterus
4417:
4411:
4408:
4407:
4405:
4404:
4396:
4393:
4392:
4390:
4389:
4384:
4379:
4374:
4369:
4364:
4359:
4354:
4349:
4344:
4339:
4334:
4329:
4324:
4319:
4314:
4309:
4304:
4299:
4294:
4289:
4284:
4279:
4277:Musca Borealis
4274:
4269:
4264:
4259:
4254:
4249:
4244:
4239:
4234:
4229:
4224:
4219:
4214:
4209:
4204:
4199:
4194:
4192:Custos Messium
4189:
4184:
4179:
4174:
4169:
4164:
4159:
4154:
4149:
4144:
4139:
4133:
4130:
4129:
4121:
4120:
4113:
4106:
4098:
4091:
4090:
4087:
4086:
4084:
4083:
4078:
4073:
4068:
4063:
4058:
4053:
4048:
4043:
4038:
4033:
4028:
4023:
4018:
4013:
4008:
3999:
3994:
3989:
3984:
3979:
3974:
3969:
3967:Canes Venatici
3960:
3951:
3946:
3941:
3939:Camelopardalis
3932:
3927:
3922:
3917:
3912:
3907:
3902:
3897:
3892:
3887:
3882:
3873:
3871:Coma Berenices
3864:
3859:
3849:
3846:
3845:
3840:
3839:
3832:
3825:
3817:
3810:
3809:
3806:
3805:
3795:
3792:
3791:
3789:
3788:
3783:
3778:
3773:
3768:
3763:
3758:
3753:
3748:
3743:
3738:
3733:
3728:
3723:
3718:
3713:
3708:
3703:
3698:
3693:
3688:
3683:
3678:
3673:
3668:
3663:
3658:
3653:
3648:
3643:
3638:
3633:
3628:
3623:
3618:
3613:
3608:
3603:
3598:
3593:
3588:
3583:
3578:
3573:
3568:
3563:
3558:
3553:
3547:
3544:
3543:
3534:
3533:
3526:
3519:
3511:
3504:
3503:
3498:
3497:
3490:
3483:
3475:
3466:
3465:
3463:
3462:
3456:
3453:
3452:
3450:
3449:
3444:
3439:
3434:
3429:
3424:
3419:
3414:
3409:
3404:
3399:
3394:
3389:
3384:
3379:
3374:
3369:
3364:
3359:
3354:
3349:
3344:
3339:
3334:
3329:
3324:
3319:
3314:
3309:
3304:
3299:
3294:
3289:
3284:
3279:
3274:
3269:
3264:
3259:
3254:
3249:
3244:
3239:
3234:
3229:
3224:
3219:
3214:
3209:
3204:
3199:
3194:
3189:
3184:
3179:
3174:
3169:
3164:
3159:
3154:
3149:
3144:
3139:
3134:
3132:Coma Berenices
3129:
3124:
3119:
3114:
3109:
3104:
3099:
3094:
3089:
3084:
3079:
3074:
3072:Canes Venatici
3069:
3064:
3062:Camelopardalis
3059:
3054:
3049:
3044:
3039:
3034:
3029:
3024:
3019:
3014:
3008:
3005:
3004:
2996:
2995:
2988:
2981:
2973:
2964:
2963:
2953:
2950:
2949:
2946:
2945:
2943:
2942:
2928:
2918:
2913:
2907:
2905:
2901:
2900:
2898:
2897:
2892:
2887:
2881:
2879:
2870:
2864:
2863:
2860:
2859:
2857:
2856:
2851:
2846:
2840:
2838:
2828:
2827:
2824:
2823:
2821:
2820:
2815:
2810:
2804:
2802:
2792:
2791:
2788:
2787:
2785:
2784:
2779:
2774:
2768:
2766:
2762:
2761:
2759:
2758:
2753:
2748:
2742:
2740:
2734:
2733:
2731:
2730:
2724:
2722:
2716:
2715:
2713:
2712:
2707:
2702:
2697:
2692:
2687:
2682:
2677:
2672:
2667:
2662:
2657:
2652:
2647:
2642:
2637:
2632:
2627:
2622:
2616:
2614:
2605:
2599:
2598:
2596:
2595:
2590:
2584:
2581:
2580:
2573:
2572:
2565:
2558:
2550:
2544:
2543:
2538:
2533:
2526:
2525:External links
2523:
2520:
2519:
2512:
2486:
2479:
2459:
2452:
2430:
2423:
2403:
2390:10.1086/521817
2366:(5): 139–655.
2350:
2343:
2323:
2301:
2248:
2195:
2169:
2143:
2117:
2064:
2027:(2): L31–L34.
2008:
1982:
1956:
1930:
1904:
1878:
1852:
1846:10.1086/304834
1811:
1784:
1754:
1727:
1688:(4): 1945–61.
1674:Bedding, T. R.
1664:
1638:
1612:
1579:
1572:
1552:Moore, Patrick
1543:
1496:Bedding, T. R.
1483:
1457:
1450:
1440:. Blacksburg,
1428:
1407:(5): 414–32 .
1382:
1375:
1348:
1341:
1321:
1314:
1288:
1256:
1249:
1229:
1222:
1193:
1163:
1130:
1111:Ridpath, Ian.
1103:
1081:
1051:
1020:
1019:
1017:
1014:
1013:
1012:
1005:
1002:
925:
922:
824:accretion disk
731:2.8, lying 24
705:
702:
692:
689:
677:Southern Cross
608:to the north,
585:
582:
487:
484:
458:is a variable
350:
349:
327:
326:
292:
291:constellations
286:
285:
282:
280:Meteor showers
276:
275:
272:
266:
265:
259:
258:Brightest star
255:
254:
251:
247:
246:
243:
239:
238:
235:
228:
227:
224:
212:
211:
208:
202:
201:
196:243 sq. deg. (
194:
188:
187:
184:
180:
179:
176:
170:
169:
160:
154:
153:
150:
146:
145:
83:
79:
78:
75:
69:
68:
65:
61:
60:
55:
47:
46:
15:
9:
6:
4:
3:
2:
4557:
4546:
4543:
4541:
4538:
4536:
4533:
4532:
4530:
4520:
4510:
4508:
4498:
4496:
4486:
4484:
4479:
4474:
4472:
4462:
4461:
4458:
4441:
4440:Vultur volans
4438:
4436:
4435:Vultur cadens
4433:
4431:
4428:
4426:
4423:
4421:
4418:
4416:
4413:
4412:
4409:
4403:
4402:
4398:
4397:
4394:
4388:
4385:
4383:
4380:
4378:
4375:
4373:
4370:
4368:
4365:
4363:
4360:
4358:
4355:
4353:
4350:
4348:
4345:
4343:
4340:
4338:
4335:
4333:
4330:
4328:
4325:
4323:
4320:
4318:
4317:Ramus Pomifer
4315:
4313:
4310:
4308:
4305:
4303:
4300:
4298:
4295:
4293:
4290:
4288:
4285:
4283:
4280:
4278:
4275:
4273:
4272:Mons Maenalus
4270:
4268:
4265:
4263:
4260:
4258:
4255:
4253:
4250:
4248:
4247:Lochium Funis
4245:
4243:
4240:
4238:
4235:
4233:
4232:Leo Palatinus
4230:
4228:
4225:
4223:
4220:
4218:
4215:
4213:
4210:
4208:
4205:
4203:
4200:
4198:
4195:
4193:
4190:
4188:
4185:
4183:
4180:
4178:
4175:
4173:
4170:
4168:
4165:
4163:
4160:
4158:
4155:
4153:
4150:
4148:
4145:
4143:
4140:
4138:
4135:
4134:
4131:
4126:
4119:
4114:
4112:
4107:
4105:
4100:
4099:
4096:
4092:
4082:
4079:
4077:
4074:
4072:
4069:
4067:
4064:
4062:
4059:
4057:
4054:
4052:
4049:
4047:
4044:
4042:
4039:
4037:
4034:
4032:
4029:
4027:
4024:
4022:
4019:
4017:
4014:
4012:
4009:
4007:
4003:
4000:
3998:
3995:
3993:
3990:
3988:
3985:
3983:
3980:
3978:
3975:
3973:
3970:
3968:
3964:
3961:
3959:
3955:
3952:
3950:
3947:
3945:
3942:
3940:
3936:
3933:
3931:
3928:
3926:
3923:
3921:
3918:
3916:
3913:
3911:
3908:
3906:
3903:
3901:
3898:
3896:
3893:
3891:
3888:
3886:
3883:
3881:
3877:
3874:
3872:
3868:
3865:
3863:
3860:
3858:
3854:
3851:
3850:
3847:
3838:
3833:
3831:
3826:
3824:
3819:
3818:
3815:
3811:
3803:
3793:
3787:
3784:
3782:
3779:
3777:
3774:
3772:
3769:
3767:
3764:
3762:
3759:
3757:
3754:
3752:
3749:
3747:
3744:
3742:
3739:
3737:
3734:
3732:
3729:
3727:
3724:
3722:
3719:
3717:
3714:
3712:
3709:
3707:
3704:
3702:
3699:
3697:
3694:
3692:
3689:
3687:
3684:
3682:
3679:
3677:
3674:
3672:
3669:
3667:
3664:
3662:
3659:
3657:
3654:
3652:
3649:
3647:
3644:
3642:
3639:
3637:
3634:
3632:
3629:
3627:
3624:
3622:
3619:
3617:
3614:
3612:
3609:
3607:
3604:
3602:
3599:
3597:
3594:
3592:
3589:
3587:
3584:
3582:
3579:
3577:
3574:
3572:
3569:
3567:
3564:
3562:
3559:
3557:
3554:
3552:
3549:
3548:
3545:
3540:
3532:
3527:
3525:
3520:
3518:
3513:
3512:
3509:
3505:
3496:
3491:
3489:
3484:
3482:
3477:
3476:
3473:
3461:
3458:
3457:
3454:
3448:
3445:
3443:
3440:
3438:
3435:
3433:
3430:
3428:
3425:
3423:
3420:
3418:
3415:
3413:
3410:
3408:
3405:
3403:
3400:
3398:
3395:
3393:
3390:
3388:
3385:
3383:
3380:
3378:
3375:
3373:
3370:
3368:
3365:
3363:
3360:
3358:
3355:
3353:
3350:
3348:
3345:
3343:
3340:
3338:
3335:
3333:
3330:
3328:
3325:
3323:
3320:
3318:
3315:
3313:
3310:
3308:
3305:
3303:
3300:
3298:
3295:
3293:
3290:
3288:
3285:
3283:
3280:
3278:
3275:
3273:
3270:
3268:
3265:
3263:
3260:
3258:
3255:
3253:
3250:
3248:
3245:
3243:
3240:
3238:
3235:
3233:
3230:
3228:
3225:
3223:
3220:
3218:
3215:
3213:
3210:
3208:
3205:
3203:
3200:
3198:
3195:
3193:
3190:
3188:
3185:
3183:
3180:
3178:
3175:
3173:
3170:
3168:
3165:
3163:
3160:
3158:
3155:
3153:
3150:
3148:
3145:
3143:
3140:
3138:
3135:
3133:
3130:
3128:
3125:
3123:
3120:
3118:
3115:
3113:
3110:
3108:
3105:
3103:
3100:
3098:
3095:
3093:
3090:
3088:
3085:
3083:
3080:
3078:
3075:
3073:
3070:
3068:
3065:
3063:
3060:
3058:
3055:
3053:
3050:
3048:
3045:
3043:
3040:
3038:
3035:
3033:
3030:
3028:
3025:
3023:
3020:
3018:
3015:
3013:
3010:
3009:
3006:
3002:
2994:
2989:
2987:
2982:
2980:
2975:
2974:
2971:
2961:
2951:
2940:
2936:
2932:
2929:
2926:
2922:
2919:
2917:
2914:
2912:
2909:
2908:
2906:
2902:
2896:
2893:
2891:
2888:
2886:
2883:
2882:
2880:
2878:
2874:
2871:
2869:
2865:
2855:
2852:
2850:
2847:
2845:
2842:
2841:
2839:
2837:
2836:Star clusters
2833:
2829:
2819:
2816:
2814:
2811:
2809:
2806:
2805:
2803:
2801:
2797:
2793:
2783:
2780:
2778:
2775:
2773:
2770:
2769:
2767:
2763:
2757:
2754:
2752:
2749:
2747:
2744:
2743:
2741:
2739:
2735:
2729:
2726:
2725:
2723:
2721:
2717:
2711:
2708:
2706:
2703:
2701:
2698:
2696:
2693:
2691:
2688:
2686:
2683:
2681:
2678:
2676:
2673:
2671:
2668:
2666:
2663:
2661:
2658:
2656:
2653:
2651:
2648:
2646:
2643:
2641:
2638:
2636:
2633:
2631:
2628:
2626:
2623:
2621:
2618:
2617:
2615:
2613:
2609:
2606:
2604:
2600:
2594:
2591:
2589:
2586:
2585:
2582:
2578:
2571:
2566:
2564:
2559:
2557:
2552:
2551:
2548:
2542:
2539:
2537:
2534:
2532:
2529:
2528:
2515:
2509:
2505:
2500:
2499:
2490:
2482:
2476:
2472:
2471:
2463:
2455:
2449:
2445:
2441:
2434:
2426:
2420:
2416:
2415:
2407:
2399:
2395:
2391:
2387:
2383:
2379:
2374:
2369:
2365:
2361:
2354:
2346:
2340:
2336:
2335:
2327:
2318:
2313:
2305:
2297:
2293:
2289:
2285:
2281:
2277:
2272:
2267:
2264:(2): 723–27.
2263:
2259:
2252:
2244:
2240:
2236:
2232:
2228:
2224:
2219:
2214:
2211:(1): 205–18.
2210:
2206:
2199:
2183:
2179:
2173:
2157:
2153:
2147:
2132:
2128:
2121:
2113:
2109:
2105:
2101:
2097:
2093:
2088:
2083:
2079:
2075:
2068:
2060:
2056:
2052:
2048:
2044:
2040:
2035:
2030:
2026:
2022:
2021:
2012:
1996:
1992:
1991:"HR 570—Star"
1986:
1970:
1966:
1960:
1944:
1940:
1934:
1918:
1914:
1908:
1892:
1888:
1882:
1866:
1862:
1856:
1847:
1842:
1838:
1834:
1831:(2): 912–16.
1830:
1826:
1822:
1815:
1807:
1803:
1799:
1795:
1788:
1772:
1771:AAVSO Website
1768:
1761:
1759:
1742:
1738:
1737:"Gamma Hydri"
1731:
1723:
1719:
1714:
1709:
1705:
1701:
1696:
1691:
1687:
1683:
1679:
1675:
1668:
1652:
1648:
1642:
1626:
1622:
1616:
1600:
1596:
1595:"Alpha Hydri"
1592:
1586:
1584:
1575:
1569:
1565:
1560:
1559:
1553:
1547:
1539:
1535:
1531:
1527:
1523:
1519:
1514:
1509:
1505:
1501:
1497:
1490:
1488:
1471:
1467:
1461:
1453:
1447:
1443:
1439:
1432:
1423:
1418:
1414:
1410:
1406:
1402:
1401:
1396:
1392:
1386:
1378:
1372:
1368:
1367:
1359:
1357:
1355:
1353:
1344:
1338:
1334:
1333:
1325:
1317:
1311:
1307:
1302:
1301:
1292:
1284:
1280:
1276:
1272:
1271:
1266:
1260:
1252:
1246:
1242:
1241:
1233:
1225:
1219:
1215:
1208:
1206:
1204:
1202:
1200:
1198:
1181:
1177:
1173:
1167:
1151:
1147:
1143:
1137:
1135:
1118:
1114:
1107:
1091:
1085:
1069:
1065:
1061:
1055:
1040:
1036:
1030:
1028:
1026:
1021:
1011:
1008:
1007:
1001:
999:
995:
991:
987:
983:
979:
975:
971:
967:
963:
958:
956:
951:
950:spiral galaxy
947:
943:
939:
935:
931:
921:
918:
914:
912:
908:
907:Jovian planet
904:
900:
896:
894:
890:
885:
883:
879:
875:
871:
867:
862:
860:
856:
851:
849:
845:
841:
837:
833:
829:
825:
821:
817:
813:
809:
805:
801:
797:
793:
788:
786:
785:Beta Centauri
782:
778:
773:
771:
766:
762:
758:
757:subgiant star
754:
750:
746:
742:
738:
734:
730:
725:
722:
717:
711:
697:
688:
686:
682:
678:
674:
673:
668:
664:
660:
656:
655:50th parallel
652:
648:
647:30th parallel
644:
632:
628:
624:
620:
615:
611:
607:
603:
599:
596:to the east,
595:
591:
581:
579:
575:
571:
570:Atlas Céleste
567:
563:
559:
555:
551:
547:
546:De Waterslang
543:
542:
537:
533:
529:
525:
524:
519:
515:
511:
503:
502:
497:
492:
483:
481:
477:
473:
469:
465:
461:
457:
453:
449:
446:
441:
439:
435:
431:
427:
423:
419:
415:
411:
407:
403:
399:
395:
391:
390:constellation
385:
356:
348:
340:
338:
334:
328:
325:
321:
316:
312:
308:
304:
300:
296:
293:
287:
283:
281:
277:
273:
271:
267:
263:
260:
256:
252:
248:
244:
240:
236:
234:
229:
225:
221:
217:
213:
209:
207:
203:
199:
195:
193:
189:
185:
181:
177:
175:
171:
161:
159:
155:
151:
147:
142:
113:
84:
82:Pronunciation
80:
76:
74:
70:
66:
62:
58:
53:
48:
45:Constellation
43:
37:
33:
26:
22:
4519:Solar System
4425:Serpentarius
4400:
4399:
4177:Cancer Minor
4041:Microscopium
4001:
3962:
3953:
3934:
3899:
3875:
3866:
3852:
3541:after 150 AD
3277:Microscopium
3221:
2937:, partly in
2497:
2489:
2469:
2462:
2443:
2433:
2413:
2406:
2363:
2359:
2353:
2333:
2326:
2304:
2261:
2257:
2251:
2208:
2204:
2198:
2188:28 September
2186:. Retrieved
2181:
2172:
2162:13 September
2160:. Retrieved
2155:
2146:
2134:. Retrieved
2130:
2120:
2077:
2073:
2067:
2024:
2018:
2011:
2001:27 September
1999:. Retrieved
1994:
1985:
1975:12 September
1973:. Retrieved
1968:
1959:
1949:12 September
1947:. Retrieved
1942:
1939:"Eta1 Hydri"
1933:
1923:12 September
1921:. Retrieved
1916:
1907:
1897:12 September
1895:. Retrieved
1890:
1881:
1871:12 September
1869:. Retrieved
1864:
1855:
1828:
1824:
1814:
1797:
1793:
1787:
1777:12 September
1775:. Retrieved
1770:
1747:12 September
1745:. Retrieved
1740:
1735:Kaler, Jim.
1730:
1685:
1681:
1667:
1657:12 September
1655:. Retrieved
1650:
1641:
1631:12 September
1629:. Retrieved
1624:
1615:
1605:12 September
1603:. Retrieved
1598:
1557:
1546:
1503:
1499:
1476:11 September
1474:. Retrieved
1469:
1466:"Beta Hydri"
1460:
1437:
1431:
1404:
1398:
1385:
1365:
1331:
1324:
1299:
1291:
1274:
1268:
1259:
1239:
1232:
1213:
1186:29 September
1184:. Retrieved
1179:
1172:Ridpath, Ian
1166:
1156:29 September
1154:. Retrieved
1149:
1142:Ridpath, Ian
1123:11 September
1121:. Retrieved
1116:
1106:
1094:. Retrieved
1084:
1072:. Retrieved
1067:
1060:Ridpath, Ian
1054:
1044:11 September
1042:. Retrieved
1038:
986:open cluster
959:
927:
915:
897:
886:
874:Eta2 Hydri b
863:
852:
838:optical and
789:
774:
726:
713:
670:
641:, while the
587:
577:
569:
554:l’Hydre Mâle
553:
545:
539:
536:Johann Bayer
521:
507:
499:
496:Johann Bayer
442:
414:Johann Bayer
394:southern sky
392:in the deep
354:
353:
342:
330:
264: (2.82)
64:Abbreviation
36:
4507:Outer space
4495:Spaceflight
4217:Hippocampus
4076:Telescopium
4002:de Lacaille
3751:Sagittarius
3606:Capricornus
3601:Canis Minor
3596:Canis Major
3402:Telescopium
3367:Sagittarius
3087:Capricornus
3082:Canis Minor
3077:Canis Major
2933:(mostly in
2923:(mostly in
1672:Tabur, V.;
909:companion (
820:white dwarf
804:periodicity
792:Gamma Hydri
781:Alpha Hydri
733:light-years
716:Alpha Hydri
643:declination
566:Jean Fortin
558:planisphere
541:Uranometria
528:East Indies
501:Uranometria
472:dwarf novae
456:Gamma Hydri
440:observers.
418:Uranometria
388:is a small
231:Stars with
174:Declination
116:, genitive
4529:Categories
4332:Scarabaeus
4302:Polophylax
4162:Argo Navis
4031:Horologium
3885:Chamaeleon
3781:Ursa Minor
3776:Ursa Major
3771:Triangulum
3611:Cassiopeia
3571:Argo Navis
3427:Ursa Minor
3422:Ursa Major
3407:Triangulum
3212:Horologium
3117:Chamaeleon
3097:Cassiopeia
2818:HD 10180 c
2800:Exoplanets
1800:: 369–78.
1767:"VW Hydri"
1591:Kaler, Jim
1180:Star Tales
1150:Star Tales
1117:Star Tales
1068:Star Tales
1016:References
903:solar twin
812:dwarf nova
741:luminosity
708:See also:
685:culminates
681:Beta Hydri
667:Argo Navis
598:Horologium
552:called it
476:exoplanets
448:Beta Hydri
303:Horologium
206:Main stars
4471:Astronomy
4252:Lumbricus
3997:Vulpecula
3977:Leo Minor
3958:Reticulum
3949:Monoceros
3716:Ophiuchus
3656:Delphinus
3616:Centaurus
3551:Andromeda
3447:Vulpecula
3357:Reticulum
3302:Ophiuchus
3282:Monoceros
3242:Leo Minor
3167:Delphinus
3102:Centaurus
3012:Andromeda
2813:GJ 3021 b
2808:η Hydri b
2373:0707.3133
2317:1109.2497
2271:0710.5918
2136:24 August
2087:1204.1254
1887:"NSV 767"
1695:0908.3228
1513:1012.3872
1074:23 August
998:Milky Way
911:GJ 3021 b
836:polarized
796:red giant
672:Moby Dick
602:Reticulum
580:in 1763.
574:Latinised
526:, to the
460:red giant
445:magnitude
320:Reticulum
289:Bordering
220:Flamsteed
149:Symbolism
4347:Solarium
4297:Phaethon
4227:Jordanus
4182:Cerberus
4167:Asterion
4147:Antinous
4137:Anguilla
4071:Sculptor
4021:Circinus
3963:Hevelius
3954:Habrecht
3935:Plancius
3802:Category
3756:Scorpius
3681:Hercules
3671:Eridanus
3666:Equuleus
3556:Aquarius
3377:Sculptor
3372:Scorpius
3207:Hercules
3187:Eridanus
3182:Equuleus
3122:Circinus
3027:Aquarius
2960:Category
2916:PGC 6240
2868:Galaxies
2854:NGC 1466
2720:Variable
2398:12557470
2362:. 1729.
2296:16950822
2243:16606841
2131:BBC News
2112:15876919
1913:"HR 678"
1861:"HR 667"
1722:15358380
1554:(2005).
1538:37441284
1393:(1917).
1004:See also
970:NGC 1466
955:NGC 1511
946:PGC 6240
917:HD 20003
893:HD 10180
889:Sun-like
859:Pi Hydri
855:Pi Hydri
840:infrared
828:BL Hydri
808:VW Hydri
777:Achernar
745:spectrum
691:Features
639:04 35.1
635:00 06.1
594:Eridanus
480:HD 10180
468:VW Hydri
345:November
317:(corner)
299:Eridanus
183:Quadrant
167:04 35.1
163:00 06.1
73:Genitive
4457:Portals
4430:Xiphias
4367:Testudo
4292:Patella
3992:Sextans
3972:Lacerta
3944:Columba
3920:Phoenix
3761:Serpens
3746:Sagitta
3731:Perseus
3726:Pegasus
3621:Cepheus
3539:Ptolemy
3392:Sextans
3387:Serpens
3362:Sagitta
3327:Phoenix
3322:Perseus
3317:Pegasus
3232:Lacerta
3127:Columba
3107:Cepheus
2849:NGC 643
2844:NGC 602
2378:Bibcode
2276:Bibcode
2223:Bibcode
2092:Bibcode
2080:: A52.
2059:6362483
2039:Bibcode
1833:Bibcode
1802:Bibcode
1700:Bibcode
1518:Bibcode
1506:: A37.
1409:Bibcode
1279:Bibcode
1277:: 469.
1096:10 July
996:to the
978:NGC 602
934:IC 1717
899:GJ 3021
878:Jupiter
761:evolved
657:in the
649:in the
606:Phoenix
486:History
335:° and −
315:Phoenix
233:planets
4535:Hydrus
4372:Tigris
4282:Noctua
4237:Lilium
4222:Hirudo
4207:Gallus
4157:Aranea
4061:Puppis
4056:Pictor
4051:Octans
4026:Fornax
4016:Carina
4011:Caelum
4006:Antlia
4004:1763:
3987:Scutum
3965:1683:
3956:1621:
3937:1613:
3930:Volans
3925:Tucana
3900:Hydrus
3890:Dorado
3878:1596:
3869:1536:
3766:Taurus
3736:Pisces
3676:Gemini
3651:Cygnus
3646:Crater
3641:Corvus
3591:Cancer
3586:Boötes
3581:Auriga
3561:Aquila
3442:Volans
3417:Tucana
3397:Taurus
3382:Scutum
3347:Puppis
3337:Pisces
3332:Pictor
3297:Octans
3222:Hydrus
3197:Gemini
3192:Fornax
3172:Dorado
3162:Cygnus
3152:Crater
3147:Corvus
3092:Carina
3067:Cancer
3057:Caelum
3052:Boötes
3047:Auriga
3032:Aquila
3017:Antlia
2935:Dorado
2925:Tucana
2510:
2477:
2450:
2421:
2396:
2341:
2294:
2241:
2182:SIMBAD
2156:SIMBAD
2110:
2057:
1720:
1570:
1536:
1448:
1373:
1339:
1312:
1247:
1220:
964:, the
962:Dorado
884:(AU).
816:binary
743:. The
629:, the
614:Octans
610:Tucana
355:Hydrus
324:Tucana
311:Octans
295:Dorado
40:Hydrus
4483:Stars
4387:Vespa
4267:Manis
4262:Malus
4242:Limax
4197:Felis
4187:Chara
4142:Anser
4066:Pyxis
4046:Norma
4036:Mensa
3910:Musca
3905:Indus
3867:Vopel
3786:Virgo
3721:Orion
3706:Lupus
3701:Libra
3696:Lepus
3686:Hydra
3661:Draco
3626:Cetus
3576:Aries
3437:Virgo
3352:Pyxis
3307:Orion
3292:Norma
3287:Musca
3272:Mensa
3257:Lupus
3252:Libra
3247:Lepus
3227:Indus
3217:Hydra
3177:Draco
3112:Cetus
3042:Aries
2939:Mensa
2911:KKs 3
2904:Other
2765:Other
2756:20003
2751:10180
2612:Bayer
2603:Stars
2394:S2CID
2368:arXiv
2312:arXiv
2292:S2CID
2266:arXiv
2239:S2CID
2213:arXiv
2108:S2CID
2082:arXiv
2055:S2CID
2029:arXiv
1741:Stars
1718:S2CID
1690:arXiv
1599:Stars
1534:S2CID
1508:arXiv
942:comet
901:is a
891:star
844:X-ray
832:polar
704:Stars
590:Mensa
562:Hydra
434:Hydra
426:stars
307:Mensa
262:β Hyi
223:stars
216:Bayer
77:Hydri
25:Hydra
4415:Apis
4327:Rosa
4172:Bufo
4152:Apes
4081:Vela
3982:Lynx
3915:Pavo
3895:Grus
3880:Apus
3857:Crux
3711:Lyra
3432:Vela
3312:Pavo
3267:Lyra
3262:Lynx
3202:Grus
3157:Crux
3022:Apus
2999:The
2746:1237
2508:ISBN
2475:ISBN
2448:ISBN
2419:ISBN
2339:ISBN
2190:2013
2164:2013
2138:2010
2003:2013
1977:2013
1951:2013
1925:2013
1899:2013
1873:2013
1779:2013
1749:2013
1659:2013
1633:2013
1607:2013
1568:ISBN
1478:2013
1446:ISBN
1371:ISBN
1337:ISBN
1310:ISBN
1245:ISBN
1218:ISBN
1188:2013
1158:2013
1125:2013
1098:2012
1076:2013
1046:2013
992:, a
868:and
857:and
810:, a
794:, a
765:core
637:and
600:and
516:and
404:and
284:none
274:none
198:61st
192:Area
3691:Leo
3566:Ara
3237:Leo
3037:Ara
2895:813
2890:802
2885:646
2877:NGC
2772:AB8
2504:194
2386:doi
2364:134
2284:doi
2262:475
2231:doi
2209:375
2100:doi
2078:543
2047:doi
2025:437
1841:doi
1829:489
1708:doi
1686:400
1526:doi
1504:527
1417:doi
870:Eta
866:Eta
779:is
679:to
669:in
538:'s
498:'s
464:Sun
416:'s
186:SQ1
165:to
67:Hyi
32:HYI
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2728:VW
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2992:e
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2710:τ
2705:τ
2700:σ
2695:π
2690:π
2685:ν
2680:μ
2675:λ
2670:κ
2665:ι
2660:θ
2655:η
2650:η
2645:ζ
2640:ε
2635:δ
2630:γ
2625:β
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