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Aegina (/ɪˈnə/ i-JY-nə; 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 November 4, 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 dateNovember 4, 1866
Designations
MPC designation(91) Aegina
Pronunciation/ɪˈnə/ i-JY-nə
Named after
Aegina
Main belt
Orbital characteristics
Epoch December 31, 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 [1]
C
8.84

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