|Discovered by||James Craig Watson|
|Discovery date||August 24, 1867|
|Minor planet category||Main belt|
|Epoch December 31, 2006 (JD 2454100.5)|
|Aphelion||470.348 Gm (3.144 AU)|
|Perihelion||353.703 Gm (2.364 AU)|
|Semi-major axis||412.026 Gm (2.754 AU)|
|Orbital period||1669.541 d (4.57 a)|
|Average orbital speed||17.86 km/s|
|Longitude of ascending node||4.148°|
|Argument of perihelion||275.747°|
|Dimensions||141.5 ± 4 km (IRAS)
|Mass||3.7×1018 kg (assumed)|
|Mean density||1.9 g/cm³|
|Rotation period||5.982 hr|
|Absolute magnitude (H)||7.7|
93 Minerva (// mi-NUR-və) is a large trinary main-belt asteroid. It is a C-type asteroid, meaning that it has a dark surface and possibly a primitive carbonaceous composition. It was discovered by J. C. Watson on August 24, 1867, and named after Minerva, the Roman equivalent of Athena, goddess of wisdom. An occultation of a star by Minerva was observed in France, Spain and the United States on November 22, 1982. An occultation diameter of ~170 km was measured from the observations. Since then two more occultations have been observed, which give an estimated mean diameter of ~150 km for diameter.
On August 16, 2009, at 13:36 UT, the Keck Observatory's adaptive optics system revealed that the asteroid 93 Minerva possesses 2 small moons. The two moons are 4 and 3 km in size and the projected separation from Minerva corresponds to 630 km (8.8 x Rprimary) and 380 km (5.2 x Rprimary) respectively.
- "JPL Small-Body Database Browser: 93 Minerva". Jet Propulsion Laboratory. 2011-12-29 last obs. Retrieved 2012-01-28.
- Franck Marchis (October 7, 2011). "Is the triple Asteroid Minerva a baby-Ceres?". NASA blog (Cosmic Diary). Retrieved 2012-01-28.
- Using a spherical radius of 78 km; volume of a sphere * density of 1.9 g/cm³ yields a mass (m=d*v) of 3.77E+18 kg
- The occultation of AG+29°398 by 93 Minerva. R. L. Millis, L. H. Wasserman, E. Bowell, O. G. Franz, R. NyeW. OsbornA. Klemola
- Observed minor planet occultation events, version of 2005 July 26
- Franck Marchis (2009-08-21). "The discovery of a new triple asteroid, (93) Minerva". Cosmic Diary Blog. Retrieved 2009-10-25.
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