(17) Thetis
|
Asteroid (17) Thetis 
|
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2,470 AU |
| eccentricity | 0.1346 |
| Perihelion - aphelion | 2.137 AU - 2.802 AU |
| Inclination of the orbit plane | 5.59 ° |
| Length of the ascending node | 125.6 ° |
| Argument of the periapsis | 135.6 ° |
| Time of passage of the perihelion | February 26, 2012 |
| Sidereal period | 3 a 322 d |
| Mean orbital velocity | 18.9 km / s |
| Physical Properties | |
| Medium diameter | 90 km |
| Dimensions | approx. 7.6 · 10 17 kg |
| Albedo | 0.17 |
| Medium density | approx. 2 g / cm³ |
| Rotation period | 12.3 h |
| Absolute brightness | 7.8 likes |
|
Spectral class (according to Tholen) |
S. |
|
Spectral class (according to SMASSII) |
Sl |
| history | |
| Explorer | KTR Luther |
| Date of discovery | April 17, 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. | |
(17) Thetis is an asteroid in the main asteroid belt . It was discovered on April 17, 1852 as the seventeenth asteroid by Karl Theodor Robert Luther in the Düsseldorf observatory .
The celestial body was named after Thetis , a sea nymph from Greek mythology .
Thetis orbits the Sun between 2.1 AU and 2.8 AU in 3.9 years . The orbit is inclined 5.6 ° to the ecliptic , the orbital eccentricity is 0.13.
Thetis has a diameter of 90 km. It has a light, silicate-rich surface with a geometric albedo of 0.17. It rotates on its own axis in 12.266 hours.