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.

91 Aegina
Discovery
Discovered byÉdouard Stephan
Discovery date4 November 1866
Designations
(91) Aegina
Pronunciation/ɪˈdʒaɪnə/[1]
Named after
Aegina
Main belt
AdjectivesAeginetan /iːdʒɪˈniːtən/[2]
Orbital characteristics
Epoch 31 December 2006 (JD 2454100.5)
Aphelion428.453 Gm (2.864 AU)
Perihelion346.826 Gm (2.318 AU)
387.640 Gm (2.591 AU)
Eccentricity0.105
1523.536 d (4.17 a)
18.45 km/s
183.458°
Inclination2.109°
10.806°
73.371°
Physical characteristics
Dimensions109.8 km
Mass1.4×1018 kg
Equatorial surface gravity
0.0307 m/s²
Equatorial escape velocity
0.0580 km/s
0.043 [3]
C
8.84

    References
    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. Figueira (1981) Aegina, society and politics
    3. Asteroid Data Sets Archived 17 December 2009 at the Wayback Machine
    4. Charlton T. Lewis, Charles Short, A Latin Dictionary


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