91 Aegina

91 Aegina

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=91 Aegina
discoverer=Édouard Stephan
discovered=November 4, 1866
alt_names=
mp_category=Main belt
epoch=December 31, 2006 (JD 2454100.5)
semimajor=387.640 Gm (2.591 AU)
perihelion=346.826 Gm (2.318 AU)
aphelion=428.453 Gm (2.864 AU)
eccentricity=0.105
period=1523.536 d (4.17 a)
inclination=2.109°
asc_node=10.806°
arg_peri=73.371°
mean_anomaly=183.458°
avg_speed=18.45 km/s
dimensions=109.8 km
mass=1.4e|18 kg
density=? g/cm³
surface_grav=0.0307 m/s²
escape_velocity=0.0580 km/s
rotation=? d
spectral_type=C
abs_magnitude=8.84
albedo=0.043 [ [http://www.psi.edu/pds/resource/albedo.html Asteroid Data Sets ] ]
single_temperature=~173 K

91 Aegina "(ee-jye'-nə," IPAEng|iˈdʒaɪnə) 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.

References

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