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Discovery[1] and designation
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|---|---|
| Discovered by | Alphonse Borrelly |
| Discovery date | May 28, 1868 |
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Designations
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| Alternate name[note 1] | A915 BA; 1935 UC; 1935 YL; 1939 UT; 1948 UE; 1948 WC; 1961 XJ; 1974 VB |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 476.928 Gm (3.188 AU) |
| Perihelion | 320.005 Gm (2.139 AU) |
| Semi-major axis | 398.467 Gm (2.664 AU) |
| Eccentricity | 0.197 |
| Orbital period | 1587.810 d (4.35 a) |
| Average orbital speed | 18.07 km/s |
| Mean anomaly | 304.205° |
| Inclination | 13.858° |
| Longitude of ascending node | 41.678° |
| Argument of perihelion | 196.045° |
| Dimensions | 71.9 km |
| Mass | ~3.9 × 1017 kg |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | ~0.0201 m/s² |
| Equatorial escape velocity | ~0.0380 km/s |
| Sidereal rotation period |
0.4313 d (10.35 h)[1] |
| Axial tilt | ?° |
| Pole ecliptic latitude | ? |
| Pole ecliptic longitude | ? |
| Geometric albedo | 0.058 [2] |
| Temperature | ~172 K |
| Spectral type | C |
| Absolute magnitude (H) | 9.43 |
99 Dike (pronounced /ˈdaɪkiː/ DYE-kee) is a quite large and dark main belt asteroid. Dike was discovered by Alphonse Borrelly on May 28, 1868. It was his first asteroid discovery. It is named after Dike, the Greek goddess of moral justice.
References
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