- 78 Diana
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78 Diana DiscoveryDiscovered by Karl Theodor Robert Luther Discovery date March 15, 1863 DesignationsNamed after Diana Alternate name(s) Minor planet
categoryMain belt Epoch December 31, 2006 (JD 2454100.5) Aphelion 473.182 Gm (3.163 AU) Perihelion 310.686 Gm (2.077 AU) Semi-major axis 391.934 Gm (2.620 AU) Eccentricity 0.207 Orbital period 1548.922 d (4.24 a) Average orbital speed 18.20 km/s Mean anomaly 353.808° Inclination 8.688° Longitude of ascending node 333.582° Argument of perihelion 151.423° Physical characteristicsDimensions 120.6 km Mass 1.8×1018 kg Mean density ? g/cm³ Equatorial surface gravity 0.0337 m/s² Escape velocity 0.0638 km/s Rotation period ? d Albedo 0.071 [1] Temperature ~172 K Spectral type C Absolute magnitude (H) 8.09 78 Diana (dye-an'-a) is a large and dark main-belt asteroid. Its composition is carbonaceous and primitive. It was discovered by Robert Luther on March 15, 1863, and named after Diana, Roman goddess of the hunt. 78 Diana occulted a star on September 4, 1980. A diameter of 116 km was measured, closely matching the value given by the IRAS satellite.
References
Minor planets navigator Small Solar System bodies Minor planets - Designation
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- Moons
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Comets Meteoroids Lists / categories - Asteroid groups and families
- Asteroid moons
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- Minor planets
Categories:- Main Belt asteroids
- C-type asteroids
- Asteroids named from Roman mythology
- Astronomical objects discovered in 1863
- C-type Main Belt asteroid stubs
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