(312) Pierretta
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Asteroid (312) Pierretta |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt |
| Major semi-axis | 2.781 AU |
| eccentricity | 0.161 |
| Perihelion - aphelion | 2.335 AU - 3.227 AU |
| Inclination of the orbit plane | 9 ° |
| Length of the ascending node | 6.7 ° |
| Argument of the periapsis | 260.5 ° |
| Time of passage of the perihelion | May 13, 2011 |
| Sidereal period | 4 a 233 d |
| Mean orbital velocity | 17.7 km / s |
| Physical Properties | |
| Medium diameter | 21 km |
| Albedo | 0.1967 |
| Rotation period | 10 h 17 min |
| Absolute brightness | 8.89 likes |
| Spectral class | S. |
| history | |
| Explorer | A. Charlois |
| Date of discovery | August 28, 1891 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(312) Pierretta is an asteroid of the main asteroid belt , which was discovered on August 28, 1891 by Auguste Charlois at the Observatory of Nice .
Pierretta moves at a distance of 2.3290 ( perihelion ) to 3.2304 ( aphelion ) astronomical units in 4.6346 years around the sun . The orbit is inclined 9.0414 ° to the ecliptic , the orbital eccentricity is 0.1621.
Pierretta has a diameter of 21 kilometers. It has a light, silicate-rich surface with an albedo of 0.197. It rotates around its own axis in around 10 hours and 17 minutes.