17 Thetis
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| Discovery | |
|---|---|
| Discovered by: | R. Luther |
| Discovery date: | April 17, 1852 |
| Alternative names: | A913 CA; A916 YF; 1954 SO1 |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch October 22, 2004 (JD 2453300.5) | |
| Aphelion distance: | 419.069 Gm (2.801 AU) |
| Perihelion distance: | 319.991 Gm (2.139 AU) |
| Semi-major axis: | 369.530 Gm (2.470 AU) |
| Eccentricity: | 0.134 |
| Orbital period: | 1418.027 d (3.88 a) |
| Avg. orbital speed: | 18.87 km/s |
| Mean anomaly: | 38.435° |
| Inclination: | 5.587° |
| Longitude of ascending node: | 125.622° |
| Argument of perihelion: | 135.906° |
| Physical characteristics | |
| Dimensions: | 90 km |
| Mass: | 7.6×1017 kg |
| Mean density: | 2.0? g/cm³ |
| Equatorial surface gravity: | 0.0252 m/s² |
| Escape velocity: | 0.0476 km/s |
| Rotation period: | 0.5113 d (12.27 h) [1] |
| Albedo: | 0.1715 [2] |
| Temperature: | ~173 K |
| Spectral type: | S |
| Absolute magnitude: | 7.76 |
17 Thetis (IPA: [ˈθitɪs]) is a large Main belt asteroid. It is a S-type asteroid, so it has a relatively bright silicate surface.
It was discovered by R. Luther on April 17, 1852. It was his first asteroid discovery. Its name comes from Thetis, the mother of Achilles in Greek mythology.
One Thetidian stellar occultation was observed from Oregon in 1999. However, the event was not timed.
[edit] Aspects
[edit] References
- ^ http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm
- ^ http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab
| Minor planets | ||
|---|---|---|
| Previous minor planet | 17 Thetis | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
