(20) Massalia
|
Asteroid (20) Massalia |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Asteroid family | Massalia family |
| Major semi-axis | 2.409 AU |
| eccentricity | 0.143 |
| Perihelion - aphelion | 2.065 AU - 2.752 AU |
| Inclination of the orbit plane | 0.8 ° |
| Length of the ascending node | 206.2 ° |
| Argument of the periapsis | 256.8 ° |
| Time of passage of the perihelion | May 11, 2014 |
| Sidereal period | 3 a 270 d |
| Mean orbital velocity | 19.1 km / s |
| Physical Properties | |
| Medium diameter | 145 km |
| Dimensions | 160 × 145 × 130 km |
| Dimensions | approx. 5.2 · 10 18 kg |
| Albedo | 0.2096 (± 0.030) |
| Medium density | about 3.2 g / cm³ |
| Rotation period | 8.098 h |
| Absolute brightness | 6.50 likes |
|
Spectral class (according to Tholen) |
S. |
|
Spectral class (according to SMASSII) |
S. |
| history | |
| Explorer | Annibale De Gasparis |
| Date of discovery | September 19, 1852 |
| 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. | |
(20) Massalia is an asteroid in the main asteroid belt discovered by Annibale De Gasparis on July 19, 1852 as the twentieth asteroid.
The asteroid was discovered independently by the French astronomer Jean Chacornac at the Marseille Observatory. Massalia is the ancient Latin name of the city.
Massalia moves at a distance of about 2.1 ( perihelion ) to 2.8 ( aphelion ) astronomical units in 3.7 years around the sun . The orbit is inclined 0.71 ° to the ecliptic , the orbital eccentricity is 0.14.
With a mean diameter of 145 kilometers, Massalia is one of the larger asteroids in the main belt. It has a relatively light, silicate-rich surface with an albedo of 0.21. Massalia rotates around its own axis in around 8 hours.