“Koronis family”的意思、由来-开放百科全书

The Koronis or Koronian family ({{small|FIN: 605}}), also known as the Lacrimosa family,^[1]{{rp|16}} is a very large asteroid family of stony asteroids, located in the outer region of the asteroid belt. They are thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. The family is named after 158 Koronis, and the largest known member (208 Lacrimosa) is about {{convert|41|km|mi|abbr=on}} in diameter. The Koronis family travels in a cluster along the same orbit. It has 5949 members.^[1]

This family has two subfamilies. The Karin family ({{small|FIN: 610}}) was formed remarkably recently in a catastrophic collision (destroying the parent body), with an estimated age of 5.72 million years. The Koronis(2) family ({{small|FIN: 621}}) with 246 members is the other.^[1] It formed 15 million years ago by a non-catastrophic collision with 158 Koronis.

On August 28, 1993, the Galileo spacecraft visited a member of this family, 243 Ida. A photo of Ida (and its tiny moon Dactyl) is part of the composite image at right (numbered 243).

Large members

Asteroid

Median
diameter

Semi-major axis

Orbital
inclination

Orbital
eccentricity

Discovered

Refs

158

Koronis

35.4 km

2.867 AU

1.00°

0.057

1876

158}}{{·}}{{MPC|158}}

167

Urda

39.9 km

2.855 AU

2.21°

0.035

1876

167}}{{·}}{{MPC|167}}

208

Lacrimosa

41.0 km

2.895 AU

1.751°

0.015

1879

208}}{{·}}{{MPC|208}}

243

Ida

31.3 km

2.861 AU

1.138°

0.046

1884

243}}{{·}}{{MPC|243}}

263

Dresda

23.0 km

2.886 AU

1.314°

0.079

1886

263}}{{·}}{{MPC|263}}

277

Elvira

27.0 km

2.887 AU

1.156°

0.089

1888

277}}{{·}}{{MPC|277}}

311

Claudia

24.0 km

2.897 AU

3.225°

0.008

1891

311}}{{·}}{{MPC|311}}

321

Florentina

27.0 km

2.886 AU

2.594°

0.043

1891

321}}{{·}}{{MPC|321}}

534

Nassovia

32.3 km

2.884 AU

3.277°

0.057

1904

534}}{{·}}{{MPC|534}}

720

Bohlinia

33.7 km

2.888 AU

2.359°

0.014

1911

720}}{{·}}{{MPC|720}}

1223

Neckar

22.8 km

2.869 AU

2.55052º

0.061

1931

1223}}{{·}}{{MPC|1223}}

9908

Aue

n.a.

2.900 AU

2.68°

0.036

1971

9908}}{{·}}{{MPC|9908}}

References

1. ^¹²³{{Cite journal |first1 = D. |last1 = Nesvorný |first2 = M. |last2 = Broz |first3 = V. |last3 = Carruba |date = December 2014 |title = Identification and Dynamical Properties of Asteroid Families |url = https://arxiv.org/pdf/1502.01628.pdf |journal = Asteroids IV |pages = 297–321 |bibcode = 2015aste.book..297N |doi = 10.2458/azu_uapress_9780816532131-ch016 |arxiv = 1502.01628 |access-date= 23 June 2017}}

Large members

References

External links