- 103 Hera
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103 Hera DiscoveryDiscovered by James Craig Watson[1] Discovery date September 7, 1868[1] DesignationsNamed after Hera Alternate name(s) Minor planet
categoryMain belt Epoch August 27, 2011 (JD 2455800.5)[1] Aphelion 437.17 Gm (2.9223 AU)[1] Perihelion 371.24 Gm (2.4816 AU)[1] Semi-major axis 404.202 Gm (2.702 AU)[1] Eccentricity 0.0815455[1] Orbital period 1622.213 d (4.4414 a)[1] Average orbital speed 18.09 km/s Mean anomaly 74.835° Inclination 5.421° Longitude of ascending node 136.276° Argument of perihelion 190.160° Physical characteristicsDimensions 91.2 km Mass 7.9×1017 kg Mean density ? g/cm³ Equatorial surface gravity 0.0255 m/s² Escape velocity 0.0482 km/s Rotation period ? d Albedo ? Temperature ~169 K Spectral type S Absolute magnitude (H) 7.66 103 Hera is a large main-belt asteroid. It has a silicate surface composition. It was discovered by J. C. Watson on September 7, 1868, and named after Hera, queen of the gods in Greek mythology.
References
Minor planets navigator Small Solar System bodies Minor planets - Designation
- Groups
- Moons
- Meanings of names
- Pronunciation of names
Comets Meteoroids Lists / categories - Asteroid groups and families
- Asteroid moons
- Binary asteroids
- Minor planets
Categories:- Main Belt asteroids
- S-type asteroids
- Asteroids named from Greek mythology
- Astronomical objects discovered in 1868
- S-type Main Belt asteroid stubs
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