91 Aegina
Aegina (from Latin Aegīna, Aegīnēta),[4] minor planet designation 91 Aegina, is a large main-belt asteroid. Its surface coloring is very dark and the asteroid has probably a primitive carbonaceous composition. It was discovered by a French astronomer Édouard Jean-Marie Stephan on 4 November 1866. It was his second and final asteroid discovery. The first was 89 Julia. The asteroid's name comes from Aegina, a Greek mythological figure associated with the island of the same name.
| Discovery | |
|---|---|
| Discovered by | Édouard Stephan |
| Discovery date | 4 November 1866 |
| Designations | |
| (91) Aegina | |
| Pronunciation | /ɪˈdʒaɪnə/[1] |
Named after | Aegina |
| Main belt | |
| Adjectives | Aeginetan /iːdʒɪˈniːtən/[2] |
| Orbital characteristics | |
| Epoch 31 December 2006 (JD 2454100.5) | |
| Aphelion | 428.453 Gm (2.864 AU) |
| Perihelion | 346.826 Gm (2.318 AU) |
| 387.640 Gm (2.591 AU) | |
| Eccentricity | 0.105 |
| 1523.536 d (4.17 a) | |
Average orbital speed | 18.45 km/s |
| 183.458° | |
| Inclination | 2.109° |
| 10.806° | |
| 73.371° | |
| Physical characteristics | |
| Dimensions | 109.8 km |
| Mass | 1.4×1018 kg |
Equatorial surface gravity | 0.0307 m/s² |
Equatorial escape velocity | 0.0580 km/s |
| 0.043 [3] | |
| C | |
| 8.84 | |
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- Figueira (1981) Aegina, society and politics
- Asteroid Data Sets Archived 17 December 2009 at the Wayback Machine
- Charlton T. Lewis, Charles Short, A Latin Dictionary
External links
- Lightcurve plot of 91 Aegina, Palmer Divide Observatory, B. D. Warner (2009)
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 91 Aegina at AstDyS-2, Asteroids—Dynamic Site
- 91 Aegina at the JPL Small-Body Database
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