(17) Thetis Main-belt Asteroid
Discovered on 17 April 1852 by R. Luther at Dusseldorf.
Where Thetis is today
Seen from above the solar system on 2026-10-14: Thetis is 2.49 au from the Sun and 3.32 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 17 |
| Provisional designation | A852 HA |
| Orbit class | Main-belt Asteroid |
| Diameter | 84.9 km (#335 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.193 |
| Rotation period | 12.3 hours |
| Spectral type | S |
| Absolute magnitude (H) | 7.91 |
| Orbital period | 3.89 years |
| Semi-major axis | 2.47 au |
| Perihelion – aphelion | 2.15 – 2.80 au |
| Eccentricity | 0.131 |
| Inclination | 5.60° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by R. Luther
- (26) Proserpina
- (28) Bellona
- (35) Leukothea
- (37) Fides
- (47) Aglaja
- (53) Kalypso
- (57) Mnemosyne
- (58) Concordia
- (68) Leto
- (71) Niobe
- (78) Diana
- (82) Alkmene
← (16) Psyche · (18) Melpomene →