Knowledge

Thuban

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39: 3151: 1271: 3199: 1332: 3223: 1168: 3175: 46: 3211: 3187: 1519:
Pavlovski, K.; Hummel, C. A.; Tkachenko, A.; Dervişoğlu, A.; Kayhan, C.; Zavala, R. T.; Hutter, D. J.; Tycner, C.; Şahin, T.; Audenaert, J.; Baeyens, R.; Bodensteiner, J.; Bowman, D. M.; Gebruers, S.; Jannsen, N. E.; Mombarg, J. S. G. (2022). "Dynamical parallax, physical parameters, and evolutionary
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away from the pole. It remained within one degree of celestial north for nearly 200 years afterwards, and even 900 years after its closest approach, was just 5° off the pole. Thuban was considered the pole star until about 1800 BC, when the much brighter
1027:(WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included 1837: 1815: 783: 1834: 2116: 669: 533: 791: 1296:. The radial velocity variations of the stars can be measured and the pair have a somewhat eccentric orbit of 51.4 days. The secondary is a 1226:, it will again be the pole star, that year reaching a maximum declination of 88° 43′ 17.3″, at right ascension 1223: 1219: 1284:
data. The main plot shows the entire light curve, and the inset plots show the primary and secondary minima with an expanded scale.
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Hutter, D. J.; Zavala, R. T.; Tycner, C.; Benson, J. A.; Hummel, C. A.; Sanborn, J.; Franz, O. G.; Johnston, K. J. (2016-11-01).
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Given good viewing conditions, Thuban is relatively easy to spot in the night sky, due to its location in relation to the
3255: 2109: 1373:. It is 300 light-years away and its brightness is only decreased by 0.003 of a magnitude by intervening gas and dust. 750: 1915:"Surveying the Bright Stars by Optical Interferometry. I. A Search for Multiplicity among Stars of Spectral Types F-K" 2047:
Morgan, W. W.; Abt, Helmut A.; Tapscott, J. W. (1978). "Revised MK Spectral Atlas for stars earlier than the sun".
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Having gradually drifted away from the pole over the last 4800 years, Thuban is now seen in the night sky at a
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Precession of the equinoxes for the Pole Star. Thuban is toward the right of the image, below the −2000 mark.
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Uranometria: Omnivm Asterismorvm Continens Schemata, Nova Methodo Delineata, Aereis Laminis Expressa
2547: 1348: 839: 3248: 1742: 1891: 3929: 3909: 2498: 2136: 1176: 986:('large snake' (e.g. a python or a legendary draconian serpent)). It is sometimes known as the 771: 767: 397: 129: 2803: 2440: 2304: 2125: 951: 902: 757: 745: 677: 541: 364: 80: 1543: 1422: 2052: 2003: 1936: 1640: 1586: 1539: 1474: 1418: 1289: 1133: 1077: 1057: 337: 260: 1766: 1140:. While it is well known that the two outer stars of the 'dipper' point to the modern-day 8: 3408: 3227: 2780: 906: 775: 2056: 2007: 1940: 1681:
A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations
1644: 1590: 1478: 1311:) fainter than the primary star and was detected at separations ranging from 6.2 to 2.6 3357: 3241: 3215: 3203: 3098: 2029: 1993: 1962: 1926: 1658: 1630: 1555: 1529: 1490: 1464: 1434: 1408: 1320: 1297: 1201: 928: 803: 281: 112: 2080: 2160: 2033: 2021: 1966: 1954: 1871: 1856: 1793: 1684: 1662: 1559: 1494: 1085: 1081: 1073: 1035: 959: 880: 735: 577: 382: 63: 1949: 1914: 1438: 931:
of 3.65 means it is 3.7 times fainter than the brightest star in the constellation,
3822: 3486: 3471: 3179: 2542: 2269: 2244: 2188: 2011: 1944: 1863: 1648: 1594: 1547: 1482: 1426: 1370: 1319:(TESS). The presence of eclipses places Thuban into the class of binaries known as 1293: 1069: 996: 853: 644: 508: 244: 2074: 1551: 1355:
and more massive. It has been used as an MK spectral standard for the A0III type.
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The secondary star was detected in high spatial resolution observations using the
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Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation".
3903: 3838: 3782: 3642: 3626: 3576: 3433: 3418: 3342: 2653: 2577: 2289: 2284: 2211: 2196: 2173: 2086: 2025: 1958: 898: 209: 173: 167: 75: 1653: 1618: 1195:. It was closest to the pole in 2830 BC, when it was less than 10  3716: 3547: 3428: 3377: 3362: 3347: 3191: 2741: 2279: 2274: 2264: 2254: 2201: 1249: 1188: 916: 626: 599: 488: 461: 980: 38: 3859: 3766: 3761: 3592: 3531: 3387: 3372: 3367: 2663: 2658: 2617: 2425: 2420: 2415: 2410: 2405: 2400: 2377: 2372: 2367: 2362: 2357: 2352: 2347: 2342: 2337: 2332: 2327: 2249: 2239: 2231: 2226: 2094: 1835:
English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name
1275: 1208: 891: 350: 151: 140: 101: 3732: 3403: 3134: 3093: 3088: 3042: 3037: 2718: 2713: 2708: 2703: 2698: 2693: 2688: 2683: 2678: 2602: 2572: 2567: 2562: 2322: 2317: 2312: 1366: 1352: 1196: 1184: 1137: 1129: 606: 501: 468: 379: 267: 180: 1222:, Thuban will gradually move back toward the north celestial pole. In 1031:
for this star. It is now so entered in the IAU Catalog of Star Names.
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status of the components of the bright eclipsing binary α Draconis".
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Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction".
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This article is about the star. For AMD's Thuban processor core, see
1980:
Bedding, Timothy R.; Hey, Daniel R.; Murphy, Simon J. (2019-10-31).
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magnitude class although its current apparent magnitude is 2.24.
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as the pole star, until 1793 BC, when it was superseded by
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slightly cooler than the primary, with an A1 spectral class.
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Kallinger, T.; Iliev, I.; Lehmann, H.; Weiss, W. W. (2005).
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the First Star of Right Wall of Purple Forbidden Enclosure
909:, it is historically significant as having been the north 905:. A relatively inconspicuous star in the night sky of the 868: 1912: 1892:"MAST: Barbara A. Mikulski Archive for Space Telescopes" 1743:"Bulletin of the IAU Working Group on Star Names, No. 1" 1683:(2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. 1450: 1448: 1358:
Thuban is not a main-sequence star; it has now ceased
1315:. Eclipses were detected using data obtained with the 3163: 871: 1445: 1011: 1005: 865: 1579:
Proceedings of the International Astronomical Union
1002: 856: 3115: 1855: 1147:, it is less well known that the two inner stars, 2046: 1792:, written by 陳久金. Published by 台灣書房出版有限公司, 2005, 1623:Monthly Notices of the Royal Astronomical Society 3901: 1979: 1844:, Hong Kong Space Museum. Retrieved 2010-11-23. 1822:, Hong Kong Space Museum. Retrieved 2010-11-23. 1454: 1307:. The secondary star is 1.8 magnitudes (at 700 927:magnitude class in Draco, although its current 3079: 1678: 3249: 2110: 1616: 1575:"The puzzling Maia candidate star α Draconis" 1211:of 64° 20′ 45.6″, 1204:(Kochab) began to approach the pole as well. 1111: 1105: 1095: 1089: 1045: 1039: 2740: 1703: 974: 2073:Jim Kaler's Stars, University of Illinois: 1919:The Astrophysical Journal Supplement Series 1674: 1672: 1514: 1512: 1510: 1508: 1506: 1504: 1398: 1394: 1392: 1390: 1388: 1386: 106:64° 22′ 33.062″ 3256: 3242: 2124: 2117: 2103: 1218:. After moving nearly 47° off the pole by 2644: 2015: 1997: 1948: 1930: 1652: 1634: 1617:Murphy, Simon J.; Paunzen, Ernst (2017). 1598: 1533: 1468: 1412: 66:J2000       1722:"IAU Working Group on Star Names (WGSN)" 1697: 1669: 1612: 1610: 1566: 1501: 1383: 1330: 1269: 1166: 1053:Right Wall of Purple Forbidden Enclosure 923:and placed it as the only member of his 1759: 1343:of A0III, indicating its similarity to 216: 3902: 2766: 1619:"Gaia's view of the λ Boo star puzzle" 1187:from 3942 BC, when it superseded 3237: 2098: 1853: 1847: 1607: 1317:Transiting Exoplanet Survey Satellite 1305:Navy Precision Optical Interferometer 935:(Eltanin), which Bayer placed in his 1884: 1735: 1679:Kunitzsch, Paul; Smart, Tim (2006). 3806: 1894:. Space Telescope Science Institute 1714: 1365:in its core. That makes it a white 975: 913:from the 4th to 2nd millennium BC. 228: 13: 2040: 16:Star in the constellation of Draco 14: 3971: 2067: 3221: 3209: 3197: 3185: 3173: 3150: 3149: 2049:Williams Bay: Yerkes Observatory 1265: 1021:International Astronomical Union 995: 852: 44: 37: 1973: 1906: 1825: 1803: 1780: 1335:Thuban (α Dra) in optical light 942: 3945:Henry Draper Catalogue objects 1060:consisting of Alpha Draconis, 1: 3955:Bright Star Catalogue objects 3263: 1376: 1326: 1123: 1088:for Alpha Draconis itself is 1522:Astronomy & Astrophysics 1162: 919:gave Thuban the designation 251:10.76 ± 0.17  55:Location of Thuban (circled) 7: 2087:Precession of the Equinoxes 1767:"IAU Catalog of Star Names" 1552:10.1051/0004-6361/202142292 1112: 1096: 1046: 1025:Working Group on Star Names 981: 10: 3976: 2142:Draco in Chinese astronomy 1431:10.1051/0004-6361:20078357 1401:Astronomy and Astrophysics 18: 3876: 3847: 3831: 3815: 3799: 3775: 3754: 3745: 3725: 3709: 3700: 3680: 3664: 3655: 3635: 3619: 3610: 3585: 3569: 3560: 3540: 3524: 3515: 3495: 3479: 3470: 3460: 3396: 3330: 3323: 3303: 3287: 3280: 3271: 3147: 3111: 3075: 3000: 2802: 2793: 2762: 2736: 2640: 2535: 2497: 2439: 2386: 2303: 2159: 2150: 2132: 1986:Research Notes of the AAS 1950:10.3847/0067-0049/227/1/4 1868:10.1007/978-1-4471-3613-2 1600:10.1017/S1743921305009865 1487:10.1134/S1063773712050015 1288:Thuban is a single-lined 1278:for Thuban, plotted from 1106: 1101: 1090: 1040: 826: 733: 726: 590: 452: 447: 300: 296: 186: 179: 123: 60: 31: 2017:10.3847/2515-5172/ab5112 2548:2MASS J17554042+6551277 2075:THUBAN (Alpha Draconis) 1854:Moore, Patrick (1998). 1544:2022A&A...658A..92P 1423:2007A&A...474..653V 1369:, being 120 times more 282:Absolute magnitude 113:Apparent magnitude 3935:Durchmusterung objects 3920:Spectroscopic binaries 2137:List of stars in Draco 2126:Constellation of Draco 1813:香港太空館 - 研究資源 - 亮星中英對照表 1336: 1285: 1172: 398:Argument of periastron 3925:Draco (constellation) 3889:Polarissima Australis 2081:History of Precession 1704:Johann Bayer (1603). 1654:10.1093/mnras/stw3141 1371:luminous than the Sun 1334: 1273: 1170: 965:The traditional name 365:Longitude of the node 3884:Polarissima Borealis 1290:spectroscopic binary 1084:. Consequently, the 1078:Alpha Camelopardalis 969:is derived from the 3960:Northern pole stars 3915:Suspected variables 3117:Astronomical events 2057:1978rmsa.book.....M 2008:2019RNAAS...3..163B 1941:2016ApJS..227....4H 1858:The Observer's Year 1645:2017MNRAS.466..546M 1591:2004IAUS..224..848K 1479:2012AstL...38..331A 1347:in temperature and 907:Northern Hemisphere 827:Database references 693:Rotational velocity 557:Rotational velocity 28: 3099:Draco Supercluster 1840:2010-08-10 at the 1818:2010-08-19 at the 1337: 1321:eclipsing binaries 1298:main-sequence star 1286: 1202:Beta Ursae Minoris 1173: 1097:Zǐ Wēi Yòu Yuán yī 929:apparent magnitude 728:Other designations 219: −56.34  168:Variable type 130:Spectral type 26: 3950:Hipparcos objects 3940:Flamsteed objects 3897: 3896: 3872: 3871: 3868: 3867: 3795: 3794: 3791: 3790: 3741: 3740: 3696: 3695: 3651: 3650: 3606: 3605: 3556: 3555: 3511: 3510: 3456: 3455: 3452: 3451: 3319: 3318: 3311:Polaris Australis 3161: 3160: 3143: 3142: 3107: 3106: 3071: 3070: 2789: 2788: 2758: 2757: 2732: 2731: 2636: 2635: 1877:978-3-540-76147-1 1798:978-986-7332-25-7 1690:978-1-931559-44-7 1457:Astronomy Letters 1263: 1262: 1132:(aka the Plough) 1082:BK Camelopardalis 1074:43 Camelopardalis 960:Bayer designation 881:Bayer designation 845: 844: 820:J14042335+6422331 806: 04174-01262 799: 4174-1262-1 390:JD 2453498.8 231: 17.21  3967: 3813: 3812: 3804: 3803: 3752: 3751: 3707: 3706: 3662: 3661: 3617: 3616: 3567: 3566: 3522: 3521: 3477: 3476: 3468: 3467: 3328: 3327: 3285: 3284: 3278: 3277: 3258: 3251: 3244: 3235: 3234: 3226: 3225: 3224: 3214: 3213: 3212: 3202: 3201: 3200: 3190: 3189: 3178: 3177: 3176: 3169: 3153: 3152: 3113: 3112: 3077: 3076: 2800: 2799: 2781:Cat's Eye Nebula 2764: 2763: 2738: 2737: 2642: 2641: 2157: 2156: 2119: 2112: 2105: 2096: 2095: 2061: 2060: 2044: 2038: 2037: 2019: 2001: 1977: 1971: 1970: 1952: 1934: 1910: 1904: 1903: 1901: 1899: 1888: 1882: 1881: 1861: 1851: 1845: 1833: 1829: 1823: 1811: 1807: 1801: 1788: 1784: 1778: 1777: 1775: 1773: 1763: 1757: 1756: 1754: 1752: 1747: 1739: 1733: 1732: 1730: 1728: 1718: 1712: 1711: 1701: 1695: 1694: 1676: 1667: 1666: 1656: 1638: 1614: 1605: 1604: 1602: 1570: 1564: 1563: 1537: 1516: 1499: 1498: 1472: 1452: 1443: 1442: 1416: 1396: 1254:c. 3900–1800 BC 1233: 1232: 1229: 1217: 1115: 1109: 1108: 1104:), representing 1103: 1099: 1093: 1092: 1070:24 Ursae Majoris 1049: 1043: 1042: 1018: 1017: 1014: 1013: 1010: 1007: 1004: 1001: 984: 978: 977: 958:) is the star's 878: 877: 874: 873: 870: 867: 864: 861: 858: 821: 814: 807: 800: 761: 754: 593:Alpha Draconis B 455:Alpha Draconis A 402: 387: 369: 328: 230: 218: 162: 160: 124:Characteristics 116: 96: 91: 61:Observation data 48: 41: 29: 25: 3975: 3974: 3970: 3969: 3968: 3966: 3965: 3964: 3900: 3899: 3898: 3893: 3864: 3848:Past and future 3843: 3827: 3787: 3771: 3737: 3721: 3692: 3676: 3647: 3631: 3602: 3581: 3552: 3536: 3507: 3491: 3448: 3409:γ Chamaeleontis 3392: 3324:Past and future 3315: 3299: 3267: 3262: 3232: 3222: 3220: 3210: 3208: 3198: 3196: 3184: 3174: 3172: 3164: 3162: 3157: 3139: 3103: 3081:Galaxy clusters 3067: 2996: 2785: 2754: 2728: 2632: 2543:2MASS 1237+6526 2531: 2493: 2435: 2382: 2299: 2146: 2128: 2123: 2092: 2070: 2065: 2064: 2045: 2041: 1978: 1974: 1911: 1907: 1897: 1895: 1890: 1889: 1885: 1878: 1852: 1848: 1842:Wayback Machine 1831: 1830: 1826: 1820:Wayback Machine 1809: 1808: 1804: 1786: 1785: 1781: 1771: 1769: 1765: 1764: 1760: 1750: 1748: 1745: 1741: 1740: 1736: 1726: 1724: 1720: 1719: 1715: 1702: 1698: 1691: 1677: 1670: 1615: 1608: 1571: 1567: 1517: 1502: 1453: 1446: 1397: 1384: 1379: 1329: 1313:milliarcseconds 1268: 1227: 1215: 1165: 1126: 1066:Lambda Draconis 1056:, refers to an 1047:Zǐ Wēi Yòu Yuán 1019:. In 2016, the 998: 994: 945: 855: 851: 822: 816: 809: 802: 795: 756: 749: 699: sin  658:Surface gravity 650: 647: 632: 629: 612: 609: 592: 563: sin  522:Surface gravity 514: 511: 494: 491: 474: 471: 454: 439: 437: 422: 420: 403: 395: 377: 362: 324:Semi-major axis 321: 287: 270: 227: 203:−13.0 km/s 198: 193:Radial velocity 158: 156: 111: 94: 89:Right ascension 87: 62: 56: 54: 53: 52: 51: 50: 49: 24: 17: 12: 11: 5: 3973: 3963: 3962: 3957: 3952: 3947: 3942: 3937: 3932: 3927: 3922: 3917: 3912: 3895: 3894: 3892: 3891: 3886: 3880: 3878: 3874: 3873: 3870: 3869: 3866: 3865: 3863: 3862: 3857: 3851: 3849: 3845: 3844: 3842: 3841: 3835: 3833: 3829: 3828: 3826: 3825: 3819: 3817: 3810: 3801: 3797: 3796: 3793: 3792: 3789: 3788: 3786: 3785: 3779: 3777: 3773: 3772: 3770: 3769: 3764: 3758: 3756: 3749: 3743: 3742: 3739: 3738: 3736: 3735: 3729: 3727: 3723: 3722: 3720: 3719: 3713: 3711: 3704: 3698: 3697: 3694: 3693: 3691: 3690: 3684: 3682: 3678: 3677: 3675: 3674: 3668: 3666: 3659: 3653: 3652: 3649: 3648: 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3002: 2998: 2997: 2995: 2994: 2989: 2984: 2979: 2974: 2969: 2964: 2959: 2954: 2949: 2944: 2939: 2934: 2929: 2924: 2919: 2914: 2909: 2904: 2899: 2894: 2889: 2884: 2879: 2874: 2869: 2864: 2859: 2854: 2849: 2844: 2839: 2834: 2829: 2824: 2819: 2814: 2808: 2806: 2797: 2791: 2790: 2787: 2786: 2784: 2783: 2778: 2772: 2770: 2760: 2759: 2756: 2755: 2753: 2752: 2746: 2744: 2734: 2733: 2730: 2729: 2727: 2726: 2721: 2716: 2711: 2706: 2701: 2696: 2691: 2686: 2681: 2676: 2671: 2666: 2661: 2656: 2650: 2648: 2638: 2637: 2634: 2633: 2631: 2630: 2628:WISE 1647+5632 2625: 2620: 2615: 2610: 2605: 2600: 2595: 2590: 2585: 2580: 2575: 2570: 2565: 2560: 2555: 2550: 2545: 2539: 2537: 2533: 2532: 2530: 2529: 2524: 2519: 2514: 2509: 2503: 2501: 2495: 2494: 2492: 2491: 2486: 2481: 2476: 2471: 2466: 2461: 2456: 2451: 2445: 2443: 2437: 2436: 2434: 2433: 2428: 2423: 2418: 2413: 2408: 2403: 2398: 2392: 2390: 2384: 2383: 2381: 2380: 2375: 2370: 2365: 2360: 2355: 2350: 2345: 2340: 2335: 2330: 2325: 2320: 2315: 2309: 2307: 2301: 2300: 2298: 2297: 2292: 2287: 2282: 2277: 2272: 2267: 2262: 2257: 2252: 2247: 2242: 2237: 2229: 2224: 2219: 2214: 2209: 2204: 2199: 2194: 2186: 2181: 2176: 2171: 2165: 2163: 2154: 2148: 2147: 2145: 2144: 2139: 2133: 2130: 2129: 2122: 2121: 2114: 2107: 2099: 2090: 2089: 2083: 2077: 2069: 2068:External links 2066: 2063: 2062: 2039: 1972: 1905: 1883: 1876: 1846: 1824: 1802: 1779: 1758: 1734: 1713: 1696: 1689: 1668: 1606: 1565: 1500: 1444: 1407:(2): 653–664. 1381: 1380: 1378: 1375: 1341:spectral class 1328: 1325: 1267: 1264: 1261: 1260: 1255: 1252: 1246: 1245: 1242: 1237: 1224:20,346 AD 1220:10,000 AD 1193:Kappa Draconis 1164: 1161: 1157:light-polluted 1125: 1122: 1062:Kappa Draconis 956:Alpha Draconis 944: 941: 933:Gamma Draconis 894:system in the 884:Alpha Draconis 843: 842: 837: 829: 828: 824: 823: 774: 123299, 734: 731: 730: 724: 723: 717: 709: 708: 705: 688: 687: 681: 673: 672: 666: 653: 652: 648: 645: 641: 635: 634: 630: 627: 623: 615: 614: 610: 607: 603: 595: 594: 588: 587: 581: 573: 572: 571:25.4 km/s 569: 552: 551: 545: 537: 536: 530: 517: 516: 512: 509: 505: 497: 496: 492: 489: 485: 477: 476: 472: 469: 465: 457: 456: 450: 449: 445: 444: 441: 435: 432:Semi-amplitude 428: 427: 424: 418: 414:Semi-amplitude 409: 408: 405: 392: 391: 388: 374: 373: 370: 359: 358: 355: 346: 345: 342: 333: 332: 329: 318: 317: 314: 305: 304: 298: 297: 294: 293: 290: 285: 277: 276: 264: 256: 255: 249: 240: 239: 214: 205: 204: 201: 196: 188: 187: 184: 183: 177: 176: 170: 164: 163: 154: 147: 146: 143: 136: 135: 132: 126: 125: 121: 120: 117: 108: 107: 104: 98: 97: 92: 84: 83: 78: 72: 71: 58: 57: 43: 42: 36: 35: 34: 33: 32: 15: 9: 6: 4: 3: 2: 3972: 3961: 3958: 3956: 3953: 3951: 3948: 3946: 3943: 3941: 3938: 3936: 3933: 3931: 3930:Bayer objects 3928: 3926: 3923: 3921: 3918: 3916: 3913: 3911: 3910:A-type giants 3908: 3907: 3905: 3890: 3887: 3885: 3882: 3881: 3879: 3875: 3861: 3858: 3856: 3853: 3852: 3850: 3846: 3840: 3837: 3836: 3834: 3830: 3824: 3821: 3820: 3818: 3814: 3811: 3809: 3805: 3802: 3798: 3784: 3781: 3780: 3778: 3774: 3768: 3765: 3763: 3760: 3759: 3757: 3753: 3750: 3748: 3744: 3734: 3731: 3730: 3728: 3724: 3718: 3715: 3714: 3712: 3708: 3705: 3703: 3699: 3689: 3686: 3685: 3683: 3679: 3673: 3670: 3669: 3667: 3663: 3660: 3658: 3654: 3644: 3641: 3640: 3638: 3634: 3628: 3625: 3624: 3622: 3618: 3615: 3613: 3609: 3599: 3596: 3594: 3591: 3590: 3588: 3584: 3578: 3575: 3574: 3572: 3568: 3565: 3563: 3559: 3549: 3546: 3545: 3543: 3539: 3533: 3530: 3529: 3527: 3523: 3520: 3518: 3514: 3504: 3501: 3500: 3498: 3494: 3488: 3485: 3484: 3482: 3478: 3475: 3473: 3469: 3466: 3464: 3459: 3445: 3442: 3440: 3437: 3435: 3432: 3430: 3427: 3425: 3422: 3420: 3417: 3415: 3412: 3410: 3407: 3405: 3402: 3401: 3399: 3395: 3389: 3386: 3384: 3381: 3379: 3376: 3374: 3371: 3369: 3366: 3364: 3361: 3359: 3356: 3354: 3351: 3349: 3346: 3344: 3341: 3339: 3336: 3335: 3333: 3329: 3326: 3322: 3312: 3309: 3308: 3306: 3302: 3296: 3293: 3292: 3290: 3286: 3283: 3279: 3276: 3274: 3270: 3266: 3259: 3254: 3252: 3247: 3245: 3240: 3239: 3236: 3229: 3219: 3217: 3207: 3205: 3195: 3193: 3188: 3183: 3181: 3171: 3170: 3167: 3156: 3146: 3136: 3133: 3131: 3128: 3126: 3123: 3122: 3120: 3118: 3114: 3110: 3100: 3097: 3095: 3092: 3090: 3087: 3086: 3084: 3082: 3078: 3074: 3064: 3061: 3059: 3056: 3054: 3051: 3049: 3046: 3044: 3041: 3039: 3036: 3034: 3031: 3029: 3026: 3024: 3021: 3019: 3016: 3014: 3011: 3009: 3006: 3005: 3003: 2999: 2993: 2990: 2988: 2985: 2983: 2980: 2978: 2975: 2973: 2970: 2968: 2965: 2963: 2960: 2958: 2955: 2953: 2950: 2948: 2945: 2943: 2940: 2938: 2935: 2933: 2930: 2928: 2925: 2923: 2920: 2918: 2915: 2913: 2910: 2908: 2905: 2903: 2900: 2898: 2895: 2893: 2890: 2888: 2885: 2883: 2880: 2878: 2875: 2873: 2870: 2868: 2865: 2863: 2860: 2858: 2855: 2853: 2850: 2848: 2845: 2843: 2840: 2838: 2835: 2833: 2830: 2828: 2825: 2823: 2820: 2818: 2815: 2813: 2810: 2809: 2807: 2805: 2801: 2798: 2796: 2792: 2782: 2779: 2777: 2774: 2773: 2771: 2769: 2765: 2761: 2751: 2748: 2747: 2745: 2743: 2742:Star clusters 2739: 2735: 2725: 2722: 2720: 2717: 2715: 2712: 2710: 2707: 2705: 2702: 2700: 2697: 2695: 2692: 2690: 2687: 2685: 2682: 2680: 2677: 2675: 2672: 2670: 2667: 2665: 2662: 2660: 2657: 2655: 2652: 2651: 2649: 2647: 2643: 2639: 2629: 2626: 2624: 2621: 2619: 2616: 2614: 2611: 2609: 2606: 2604: 2601: 2599: 2596: 2594: 2591: 2589: 2586: 2584: 2581: 2579: 2576: 2574: 2571: 2569: 2566: 2564: 2561: 2559: 2556: 2554: 2551: 2549: 2546: 2544: 2541: 2540: 2538: 2534: 2528: 2525: 2523: 2520: 2518: 2515: 2513: 2510: 2508: 2505: 2504: 2502: 2500: 2496: 2490: 2487: 2485: 2482: 2480: 2477: 2475: 2474:6618 (Alruba) 2472: 2470: 2467: 2465: 2462: 2460: 2457: 2455: 2452: 2450: 2447: 2446: 2444: 2442: 2438: 2432: 2429: 2427: 2424: 2422: 2419: 2417: 2414: 2412: 2409: 2407: 2404: 2402: 2399: 2397: 2394: 2393: 2391: 2389: 2385: 2379: 2376: 2374: 2371: 2369: 2366: 2364: 2361: 2359: 2356: 2354: 2351: 2349: 2346: 2344: 2341: 2339: 2336: 2334: 2331: 2329: 2326: 2324: 2321: 2319: 2316: 2314: 2311: 2310: 2308: 2306: 2302: 2296: 2293: 2291: 2288: 2286: 2283: 2281: 2278: 2276: 2273: 2271: 2268: 2266: 2263: 2261: 2258: 2256: 2253: 2251: 2248: 2246: 2243: 2241: 2238: 2236: 2235: 2230: 2228: 2225: 2223: 2220: 2218: 2215: 2213: 2210: 2208: 2205: 2203: 2200: 2198: 2195: 2193: 2192: 2187: 2185: 2182: 2180: 2177: 2175: 2172: 2170: 2167: 2166: 2164: 2162: 2158: 2155: 2153: 2149: 2143: 2140: 2138: 2135: 2134: 2131: 2127: 2120: 2115: 2113: 2108: 2106: 2101: 2100: 2097: 2093: 2088: 2085:Crystalinks: 2084: 2082: 2078: 2076: 2072: 2071: 2058: 2054: 2050: 2043: 2035: 2031: 2027: 2023: 2018: 2013: 2009: 2005: 2000: 1995: 1991: 1987: 1983: 1976: 1968: 1964: 1960: 1956: 1951: 1946: 1942: 1938: 1933: 1928: 1924: 1920: 1916: 1909: 1893: 1887: 1879: 1873: 1869: 1865: 1860: 1859: 1850: 1843: 1839: 1836: 1828: 1821: 1817: 1814: 1806: 1799: 1795: 1791: 1783: 1768: 1762: 1744: 1738: 1723: 1717: 1709: 1708: 1700: 1692: 1686: 1682: 1675: 1673: 1664: 1660: 1655: 1650: 1646: 1642: 1637: 1632: 1628: 1624: 1620: 1613: 1611: 1601: 1596: 1592: 1588: 1584: 1580: 1576: 1569: 1561: 1557: 1553: 1549: 1545: 1541: 1536: 1531: 1527: 1523: 1515: 1513: 1511: 1509: 1507: 1505: 1496: 1492: 1488: 1484: 1480: 1476: 1471: 1466: 1462: 1458: 1451: 1449: 1440: 1436: 1432: 1428: 1424: 1420: 1415: 1410: 1406: 1402: 1395: 1393: 1391: 1389: 1387: 1382: 1374: 1372: 1368: 1364: 1361: 1356: 1354: 1350: 1346: 1342: 1339:Thuban has a 1333: 1324: 1322: 1318: 1314: 1310: 1306: 1301: 1299: 1295: 1291: 1283: 1282: 1277: 1272: 1266:Binary system 1259: 1256: 1253: 1251: 1248: 1247: 1244:Succeeded by 1243: 1241: 1238: 1235: 1234: 1231: 1225: 1221: 1214: 1210: 1205: 1203: 1198: 1194: 1190: 1186: 1182: 1178: 1169: 1160: 1158: 1154: 1150: 1146: 1143: 1139: 1135: 1131: 1121: 1119: 1114: 1098: 1087: 1083: 1079: 1075: 1071: 1067: 1063: 1059: 1055: 1054: 1048: 1037: 1032: 1030: 1026: 1022: 1016: 993: 989: 988:Dragon's Tail 985: 983: 972: 968: 963: 961: 957: 953: 949: 940: 938: 934: 930: 926: 922: 918: 914: 912: 908: 904: 900: 899:constellation 897: 893: 889: 885: 882: 876: 849: 841: 838: 836: 835: 831: 830: 825: 819: 812: 805: 798: 793: 790: 18861, 789: 786: 16273, 785: 781: 778: 68756, 777: 773: 770: 19019, 769: 765: 760:+65° 978 759: 753:+64° 666 752: 747: 743: 742: 738: 732: 729: 725: 722: 718: 716: 715: 711: 710: 707:168 km/s 706: 704: 702: 698: 694: 690: 689: 686: 682: 680: 679: 675: 674: 671: 667: 665: 663: 659: 655: 654: 651: 642: 640: 637: 636: 633: 624: 622: 621: 617: 616: 613: 604: 602: 601: 597: 596: 589: 586: 582: 580: 579: 575: 574: 570: 568: 566: 562: 558: 554: 553: 550: 546: 544: 543: 539: 538: 535: 531: 529: 527: 523: 519: 518: 515: 506: 504: 503: 499: 498: 495: 486: 484: 483: 479: 478: 475: 466: 464: 463: 459: 458: 451: 446: 442: 433: 430: 429: 425: 416: 415: 411: 410: 406: 401: 399: 394: 393: 389: 386: 384: 381: 376: 375: 371: 368: 366: 361: 360: 356: 354: 352: 348: 347: 343: 341: 339: 335: 334: 330: 327: 325: 320: 319: 315: 313: 311: 307: 306: 303: 299: 295: 291: 289: 283: 279: 278: 274: 271:(93 ± 1  269: 266:303 ± 5  265: 263: 262: 258: 257: 254: 250: 248: 246: 242: 241: 238: 234: 226: 222: 215: 213: 211: 210:Proper motion 207: 206: 202: 200: 194: 190: 189: 185: 182: 178: 175: 171: 169: 166: 165: 155: 153: 149: 148: 144: 142: 138: 137: 133: 131: 128: 127: 122: 118: 114: 110: 109: 105: 103: 100: 99: 95:14 04 23.3500 93: 90: 86: 85: 82: 79: 77: 76:Constellation 74: 73: 69: 65: 59: 47: 40: 30: 22: 3800:Other bodies 3352: 3228:Solar System 2578:GRW +70 8247 2233: 2202:η (Athebyne) 2197:ζ (Aldhibah) 2190: 2174:β (Rastaban) 2168: 2091: 2048: 2042: 1989: 1985: 1975: 1922: 1918: 1908: 1896:. Retrieved 1886: 1857: 1849: 1832:(in Chinese) 1827: 1810:(in Chinese) 1805: 1789: 1787:(in Chinese) 1782: 1770:. Retrieved 1761: 1749:. Retrieved 1737: 1725:. Retrieved 1716: 1706: 1699: 1680: 1626: 1622: 1582: 1578: 1568: 1525: 1521: 1460: 1456: 1404: 1400: 1357: 1338: 1302: 1287: 1279: 1250:Tau Herculis 1236:Preceded by 1206: 1189:Tau Herculis 1174: 1127: 1117: 1086:Chinese name 1051: 1033: 1028: 1023:organized a 991: 987: 979: 966: 964: 955: 947: 946: 943:Nomenclature 936: 924: 917:Johann Bayer 915: 887: 883: 847: 846: 832: 794: 3209, 782: 5291, 740: 736: 712: 700: 696: 691: 676: 661: 656: 638: 618: 598: 591:α Draconis B 576: 564: 560: 555: 540: 525: 520: 500: 480: 460: 453:α Draconis A 431: 412: 396: 378: 363: 349: 338:Eccentricity 336: 322: 308: 280: 259: 243: 208: 191: 3860:36 Draconis 3216:Outer space 3204:Spaceflight 2664:HD 167042 b 2659:HD 139357 b 2618:Struve 2398 2363:42 (Fafnir) 2240:ξ (Grumium) 2227:μ (Alrakis) 2222:λ (Giausar) 2212:ι (Edasich) 2179:γ (Eltanin) 1992:(10): 163. 1585:: 848–852. 1351:, but more 1276:light curve 1228:19 08 54.17 1216:14 04 33.58 1209:declination 1175:Due to the 1118:Right Pivot 1116:), meaning 1100:, English: 1050:), meaning 892:binary star 766: 521, 746:11 Dra 678:Temperature 668:4.090  625:2.326  605:2.431  547:10225  542:Temperature 532:3.555  487:4.932  467:3.186  440:(secondary) 426:48.512 km/s 404:(secondary) 372:252.6° 351:Inclination 316:51.417350 d 152:color index 141:color index 134:A0IV + A1V 102:Declination 3904:Categories 3855:ω Draconis 3823:o Draconis 3733:15 Orionis 3688:δ Octantis 3503:α Pictoris 3487:o Draconis 3348:τ Herculis 3343:ι Herculis 3135:SN 2016aps 3089:Abell 2218 2719:TOI-1452 b 2694:Kepler-90e 2689:Kepler-12b 2679:Kepler-10b 2646:Exoplanets 2603:Kepler-296 2573:Gliese 687 2568:Gliese 625 2563:Gliese 420 2318:7 (Tianyi) 2285:ψ (Dziban) 2260:σ (Alsafi) 2184:δ (Altais) 2169:α (Thuban) 1999:1910.12449 1932:1609.05254 1898:16 October 1636:1612.01528 1629:(1): 546. 1535:2111.03887 1463:(5): 331. 1377:References 1367:giant star 1327:Properties 1197:arcminutes 1185:north pole 1177:precession 1138:Ursa Major 1130:Big Dipper 1124:Visibility 948:α Draconis 888:α Draconis 813:14030+6436 683:9930  660:(log  643:47.5  639:Luminosity 524:(log  502:Luminosity 443:63.58 km/s 407:22.4° 380:Periastron 357:85.4° 181:Astrometry 172:suspected 3839:δ Doradus 3643:δ Doradus 3548:η Doradus 3434:Alsephina 3429:Aspidiske 3424:υ Carinae 3419:ω Carinae 3414:I Carinae 3378:Alderamin 3265:Pole star 3180:Astronomy 3094:CL1358+62 3058:PGC 39058 3043:H1821+643 3038:4C +72.26 2674:Kepler-4b 2598:Kepler-90 2593:Kepler-12 2588:Kepler-10 2323:8 (Taiyi) 2305:Flamsteed 2034:213224065 2026:2515-5172 1967:118803592 1959:0067-0049 1663:119328659 1560:243847585 1495:119257644 1470:1108.4971 1414:0708.1752 1240:Pole star 1163:Pole star 1142:pole star 952:Latinised 911:pole star 737:Alpha Dra 719:345  583:280  507:240  423:(primary) 115: (V) 21:Phenom II 3877:See also 3832:Southern 3816:Northern 3776:Southern 3755:Northern 3726:Southern 3710:Northern 3681:Southern 3665:Northern 3636:Southern 3627:Aldhibah 3620:Northern 3586:Southern 3570:Northern 3541:Southern 3525:Northern 3496:Southern 3480:Northern 3397:Southern 3368:ι Cephei 3331:Northern 3304:Southern 3288:Northern 3155:Category 3130:SN 2005B 3063:UGC 9391 3028:3C 390.3 3008:3C 249.1 2795:Galaxies 2776:Abell 50 2750:LAMOST 1 2623:TOI-1136 2608:LP 71-82 2583:Kepler-4 2553:G 240-72 2388:Variable 2079:NASA's: 1925:(1): 4. 1838:Archived 1816:Archived 1439:18759600 1360:hydrogen 1353:luminous 1349:spectrum 1294:spectrum 1134:asterism 1058:asterism 925:secundae 896:northern 879:), with 649:☉ 631:☉ 611:☉ 513:☉ 493:☉ 473:☉ 331:5.52 mas 284: (M 261:Distance 245:Parallax 3767:Fawaris 3747:Neptune 3672:Polaris 3612:Jupiter 3472:Mercury 3463:planets 3439:Canopus 3404:β Hydri 3388:Fawaris 3295:Polaris 3281:Current 3166:Portals 2768:Nebulae 2724:TrES-2b 2669:Hypatia 2654:Orbitar 2613:Qatar-1 2053:Bibcode 2004:Bibcode 1937:Bibcode 1772:28 July 1751:28 July 1641:Bibcode 1587:Bibcode 1540:Bibcode 1528:: A92. 1475:Bibcode 1419:Bibcode 1159:areas. 1145:Polaris 1036:Chinese 990:and as 982:thuʿbān 937:tertiae 890:, is a 448:Details 68:Equinox 27:Thuban 3702:Uranus 3657:Saturn 3577:Markeb 3532:Fafnir 3461:Other 3444:Sirius 3373:Alfirk 3358:Kochab 3353:Thuban 3053:KKR 25 3033:3C 401 3023:3C 371 3018:3C 319 3013:3C 305 2558:GD 356 2527:191939 2522:176693 2517:158259 2512:156279 2507:101364 2373:64 (e) 2368:45 (d) 2358:39 (b) 2343:19 (h) 2338:18 (g) 2333:15 (A) 2328:10 (i) 2234:(Kuma) 2032:  2024:  1965:  1957:  1874:  1796:  1790:中國星座神話 1727:22 May 1687:  1661:  1558:  1493:  1437:  1363:fusion 1258:Kochab 1153:Megrez 1149:Phecda 1113:Yòushū 1029:Thuban 971:Arabic 967:Thuban 848:Thuban 834:SIMBAD 620:Radius 482:Radius 310:Period 157:−0.049 145:−0.08 70:J2000 3783:Regor 3717:Sabik 3598:Deneb 3517:Venus 3383:Deneb 3363:Errai 3273:Earth 3192:Stars 3048:HFLS3 3001:Other 2867:5866B 2536:Other 2191:(Tyl) 2161:Bayer 2152:Stars 2030:S2CID 1994:arXiv 1963:S2CID 1927:arXiv 1746:(PDF) 1659:S2CID 1631:arXiv 1556:S2CID 1530:arXiv 1491:S2CID 1465:arXiv 1435:S2CID 1409:arXiv 1181:Earth 1091:紫微右垣一 976:ثعبان 973:word 921:Alpha 903:Draco 818:2MASS 741:α Dra 383:epoch 302:Orbit 292:−1.20 229:Dec.: 161:0.005 119:3.67 81:Draco 64:Epoch 3808:Moon 3762:Sadr 3593:Sadr 3562:Mars 3338:Vega 2992:6789 2987:6786 2982:6676 2977:6670 2972:6622 2967:6621 2962:6566 2957:6503 2952:6412 2947:6394 2942:6373 2937:6365 2932:6340 2927:6286 2922:6285 2917:6248 2912:6090 2907:5985 2902:5982 2897:5965 2892:5963 2887:5949 2882:5907 2877:5906 2872:5879 2862:5866 2857:5777 2852:5678 2847:4589 2842:4513 2837:4345 2832:4319 2827:4236 2822:4125 2817:4121 2812:3147 2489:7783 2484:7137 2479:6817 2469:6237 2464:5811 2459:4934 2454:4126 2449:3751 2431:V581 2022:ISSN 1955:ISSN 1900:2022 1872:ISBN 1794:ISBN 1774:2016 1753:2016 1729:2016 1685:ISBN 1583:2004 1345:Vega 1281:TESS 1151:and 1080:and 1041:紫微右垣 992:Adib 840:data 811:IRAS 600:Mass 462:Mass 344:0.43 174:Maia 150:B−V 139:U−B 2804:NGC 2012:doi 1945:doi 1923:227 1864:doi 1649:doi 1627:466 1595:doi 1548:doi 1526:658 1483:doi 1427:doi 1405:474 1179:of 1136:of 1034:In 954:to 901:of 886:or 804:GSC 797:TYC 792:PLX 788:PPM 784:SAO 776:HIP 764:FK5 721:Myr 714:Age 670:cgs 585:Myr 578:Age 534:cgs 400:(ω) 385:(T) 367:(Ω) 353:(i) 340:(e) 326:(a) 312:(P) 253:mas 247:(π) 233:mas 221:mas 217:RA: 212:(μ) 3906:: 2499:HD 2441:HR 2426:DO 2421:CX 2416:CM 2411:CL 2406:BY 2401:AG 2396:TW 2378:68 2353:36 2348:26 2232:ν 2189:ε 2051:. 2028:. 2020:. 2010:. 2002:. 1988:. 1984:. 1961:. 1953:. 1943:. 1935:. 1921:. 1917:. 1870:. 1862:. 1671:^ 1657:. 1647:. 1639:. 1625:. 1621:. 1609:^ 1593:. 1581:. 1577:. 1554:. 1546:. 1538:. 1524:. 1503:^ 1489:. 1481:. 1473:. 1461:38 1459:. 1447:^ 1433:. 1425:. 1417:. 1403:. 1385:^ 1323:. 1309:nm 1274:A 1230:. 1213:RA 1120:. 1107:右樞 1076:, 1072:, 1068:, 1064:, 1038:, 1009:iː 962:. 863:uː 860:θj 815:, 808:, 801:, 780:HR 772:HD 768:GC 762:, 758:BD 755:, 751:AG 748:, 744:, 739:, 434:(K 417:(K 273:pc 268:ly 237:yr 225:yr 195:(R 3257:e 3250:t 3243:v 3168:: 2714:i 2709:h 2704:g 2699:f 2684:c 2313:6 2295:ω 2290:ψ 2280:χ 2275:φ 2270:υ 2265:τ 2255:ρ 2250:π 2245:ο 2217:κ 2207:θ 2118:e 2111:t 2104:v 2059:. 2055:: 2036:. 2014:: 2006:: 1996:: 1990:3 1969:. 1947:: 1939:: 1929:: 1902:. 1880:. 1866:: 1800:. 1776:. 1755:. 1731:. 1710:. 1693:. 1665:. 1651:: 1643:: 1633:: 1603:. 1597:: 1589:: 1562:. 1550:: 1542:: 1532:: 1497:. 1485:: 1477:: 1467:: 1441:. 1429:: 1421:: 1411:: 1110:( 1094:( 1044:( 1015:/ 1012:b 1006:d 1003:ˈ 1000:ə 997:/ 950:( 875:/ 872:n 869:æ 866:b 857:ˈ 854:/ 850:( 703:) 701:i 697:v 695:( 685:K 664:) 662:g 646:L 628:R 608:M 567:) 565:i 561:v 559:( 549:K 528:) 526:g 510:L 490:R 470:M 438:) 436:2 421:) 419:1 288:) 286:V 275:) 235:/ 223:/ 199:) 197:v 159:± 23:.

Index

Phenom II


Epoch
Equinox
Constellation
Draco
Right ascension
Declination
Apparent magnitude
Spectral type
color index
color index
Variable type
Maia
Astrometry
Radial velocity
Proper motion
mas
yr
mas
yr
Parallax
mas
Distance
ly
pc
Absolute magnitude
Orbit
Period

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