61:
319:, a very large 300 km diameter asteroid, orbits nearby with a proper inclination of 6.37°, and was sometimes considered part of the Hygiea family in the past, but it is an unrelated asteroid. A better sampling of asteroids in the area in recent years has clearly shown that it orbits well beyond the Hygiea family clump.
76:
that is the fourth largest in the belt. The remaining members are much smaller so Hygiea contains about 94–98% of the mass in the family (depending on the exact criteria for inclusion). The two next largest members are
273:
This family contains quite a large number of identified interlopers. The following have been identified in a spectral survey (Mothé-Diniz 2001), and also by inspection of the PDS asteroid taxonomy data set for
88:
The Hygiea family is thought to have arisen from a catastrophically disruptive impact, after which Hygiea re-accumulated. The two 70-kilometer-diameter bodies, which are much larger than, for example, the
305:
In fact, some of the other asteroids of the C spectral type are probably interlopers as well, due to the prevalence of this spectral type in the region. Possible candidates include
366:
265:
in 2005 yielded 1043 objects lying within the rectangular-shaped region defined by the first table above. This would give about 1% of all asteroids in the asteroid belt.
387:
415:
408:
685:
261:
The 1995 analysis by ZappalĂ found 103 core members, whereas a search of a recent proper element database (AstDys)for 96944
336:; Froeschlé, C. (1995). "Asteroid Families: Search of a 12,487-Asteroid Sample Using Two Different Clustering Techniques".
401:
532:
85:, both just over 70 km in diameter. After that, the remaining members have diameters of less than 30 km.
464:
623:
449:
613:
603:
680:
608:
93:, which contains no members above around 10 km in diameter, are consistent with this scenario.
444:
628:
512:
424:
116:
549:
454:
522:
345:
215:
137:
8:
375:
Rotationally
Resolved Spectra of 10 Hygiea and a Spectroscopic Study of the Hygiea Family
115:
A HCM numerical analysis by (Zappala 1995) found a 'core' group of family members, whose
349:
329:
507:
459:
233:
190:
161:
633:
353:
197:
194:
107:
There are some indications that this family is relatively quite old (Tanga 1999).
554:
497:
482:
333:
279:
275:
209:
128:
97:
73:
38:
34:
569:
537:
502:
310:
101:
82:
52:. About 1% of all known asteroids in the asteroid belt belong to this family.
674:
593:
492:
487:
45:
393:
659:
432:
357:
262:
90:
96:
The family contains a significant number of objects of the otherwise rare
649:
598:
559:
306:
299:
221:
146:
78:
618:
564:
295:
287:
283:
654:
544:
316:
291:
100:(Mothé-Diniz 2001). The largest of these is the previously mentioned
69:
49:
313:, based on their unusually large size for cratering family members.
474:
382:
On the Size
Distribution of Asteroid Families: The Role of Geometry
41:
60:
328:
31:
585:
370:, ASP Conference Series, Vol. 107, p. 45 (1996).
390:. Proper elements for 96944 numbered minor planets.
364:Farinella, Paolo; Davia, D. R.; and Marzari, F.;
672:
202:
121:
423:
409:
64:Location and structure of the Hygiea family.
416:
402:
59:
377:, Icarus, Vol. 152, p. 117 (2001).
673:
384:, Icarus, Vol. 141, p. 65 (1999).
397:
110:
13:
55:
14:
697:
48:, the largest member of which is
367:Asteroid Families, Old and Young
332:; Bendjoya, Ph.; Cellino, A.;
268:
119:lie in the approximate ranges
1:
322:
68:By far the largest member is
686:Asteroid groups and families
7:
10:
702:
642:
584:
521:
473:
440:
431:
425:Small Solar System bodies
373:Mothé-Diniz, T., et al.;
200:of these core members is
72:, a 400 km diameter
117:proper orbital elements
30:is a grouping of dark,
550:Trans-Neptunian object
358:10.1006/icar.1995.1127
65:
63:
523:Distant minor planet
380:Tanga, P., et al.;
350:1995Icar..116..291Z
66:
16:Group of asteroids
668:
667:
580:
579:
465:Meanings of names
259:
258:
187:
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111:Location and size
693:
681:Hygiea asteroids
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198:orbital elements
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193:, the range of
189:At the present
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98:B spectral type
74:C-type asteroid
58:
56:Characteristics
17:
12:
11:
5:
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624:Near-parabolic
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570:Scattered disc
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538:Neptune trojan
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513:Spectral types
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503:Jupiter trojan
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344:(2): 291–314.
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311:538 Friederike
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102:538 Friederike
83:538 Friederike
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15:
9:
6:
4:
3:
2:
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493:Asteroid belt
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488:Aten asteroid
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433:Minor planets
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334:Farinella, P.
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263:minor planets
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46:asteroid belt
43:
40:
36:
33:
29:
26:
22:
660:Space debris
381:
374:
365:
341:
337:
315:
304:
272:
260:
249:3.24 AU
220:
208:
188:
177:3.22 AU
145:
127:
114:
106:
95:
91:Vesta family
87:
67:
32:carbonaceous
27:
24:
20:
18:
650:Cosmic dust
614:Long-period
604:Halley-type
560:Kuiper belt
445:Designation
388:AstDys site
330:ZappalĂ , V.
307:333 Badenia
300:1599 Giomus
269:Interlopers
79:333 Badenia
675:Categories
655:Meteoroids
634:Sungrazing
609:Hyperbolic
565:Oort cloud
508:Near-Earth
323:References
296:1209 Pumma
288:108 Hecuba
284:100 Hekate
232:3.06
195:osculating
160:3.06
545:Damocloid
317:52 Europa
292:1109 Tata
282:members:
70:10 Hygiea
50:10 Hygiea
44:in outer
42:asteroids
629:Periodic
555:Detached
475:Asteroid
594:Extinct
533:Centaur
346:Bibcode
25:Hygiean
586:Comets
498:Family
483:Active
450:Groups
338:Icarus
298:, and
280:D-type
81:, and
39:B-type
35:C-type
28:family
21:Hygiea
643:Other
599:Great
255:6.8°
252:0.191
241:3.5°
238:0.088
191:epoch
183:5.8°
180:0.163
169:4.2°
166:0.109
619:Lost
460:Moon
455:List
309:and
278:and
37:and
19:The
354:doi
342:116
246:max
229:min
174:max
157:min
23:or
677::
352:.
340:.
302:.
294:,
290:,
286:,
276:S-
234:AU
162:AU
104:.
417:e
410:t
403:v
360:.
356::
348::
222:i
216:e
210:a
149:p
147:i
140:p
138:e
131:p
129:a
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