17 Thetis: Difference between revisions
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| albedo=0.1715 <ref>http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab</ref> |
| albedo=0.1715 <ref>http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab</ref> |
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| single_temperature=~173 [[kelvin|K]]}} |
| single_temperature=~173 [[kelvin|K]]}} |
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'''17 Thetis''' ({{ |
'''17 Thetis''' ({{IPAEng|ˈθiːtɨs}}) is a large [[Main belt]] [[asteroid]]. It is a [[S-type asteroid|S-type]] asteroid, so it has a relatively bright [[silicate]] surface. |
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It was discovered by [[Karl Theodor Robert Luther|R. Luther]] on [[April 17]], [[1852]]. It was his first asteroid discovery. Its name comes from [[Thetis]], the mother of [[Achilles]] in [[Greek mythology]]. |
It was discovered by [[Karl Theodor Robert Luther|R. Luther]] on [[April 17]], [[1852]]. It was his first asteroid discovery. Its name comes from [[Thetis]], the mother of [[Achilles]] in [[Greek mythology]]. |
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Revision as of 12:22, 10 October 2007
| Discovery | |
|---|---|
| Discovered by | R. Luther |
| Discovery date | April 17, 1852 |
| Designations | |
| A913 CA; A916 YF; 1954 SO1 | |
| Main belt | |
| Orbital characteristics | |
| Epoch October 22, 2004 (JD 2453300.5) | |
| Aphelion | 419.069 Gm (2.801 AU) |
| Perihelion | 319.991 Gm (2.139 AU) |
| 369.530 Gm (2.470 AU) | |
| Eccentricity | 0.134 |
| 1418.027 d (3.88 a) | |
Average orbital speed | 18.87 km/s |
| 38.435° | |
| Inclination | 5.587° |
| 125.622° | |
| 135.906° | |
| Physical characteristics | |
| Dimensions | 90 km |
| Mass | 7.6×1017 kg |
Mean density | 2.0? g/cm³ |
| 0.0252 m/s² | |
| 0.0476 km/s | |
| 0.5113 d (12.27 h) [1] | |
| Albedo | 0.1715 [2] |
| Temperature | ~173 K |
Spectral type | S |
| 7.76 | |
17 Thetis (/ˈθiːtɨs/) 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.