17 Thetis
 Star field shawin asteroid Thetis in the center | |
| Discovery | |
|---|---|
| Discovered bi | R. Luther |
| Discovery date | Aprile 17, 1852 |
| Designations | |
| Pronunciation | /ˈθiːtᵻs/ THEE-tis |
Named after | Thetis |
| A913 CA; A916 YF; 1954 SO1 | |
| Main belt | |
| Adjectives | Thetidian |
| Orbital chairactereestics[1] | |
| 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° | |
| Pheesical chairacteristics | |
| Dimensions | 90 ± 3.7 km (IRAS)[1] |
| Mass | 1.2×1018 kg[2][3] |
Mean density | 3.21 ± 0.92 g/cm³[2] |
| 0.0252 m/s² | |
| 0.0476 km/s | |
| 0.5113 d (12.27 h)[1][4] | |
| Albedo | 0.1715[1][5] |
| Temperatur | ~173 K |
Spectral teep | S[1] |
| 9.89 to 13.51[6] | |
| 7.76[1] | |
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17 Thetis is a lairge main-belt asteroid that wis discovered bi R. Luther on Aprile 17, 1852.
References
[eedit | eedit soorce]- ↑ a b c d e f "JPL Small-Body Database Browser: 17 Thetis". 4 August 2008. Retrieved 12 November 2008.
- ↑ a b Baer, James; Steven R. Chesley (2007). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris" (PDF). Celestial Mechanics and Dynamical Astronomy. Springer Science+Business Media B.V. 2007. 100 (2008): 27–42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8. Archived frae the original (PDF) on 24 Februar 2011. Retrieved 12 November 2008.
- ↑ (Mass o Thetis 0.00617 / Mass o Ceres 4.75) * Mass o Ceres 9.43E+20 = 1.224E+18
- ↑ "LIGHTCURVES AND MAP DATA ON NUMBERED ASTEROIDS N° 1 TO 52225". AstroSurf. Archived frae the original on 27 November 2005. Retrieved 3 November 2008.Archived 2005-11-27 at the Wayback Machine
- ↑ "Asteroid Data Archive". Planetary Science Institute. Archived frae the original on 23 Juin 2006. Retrieved 3 November 2008.
- ↑ apmag 9.89 (1977-Jul-25) to 13.51 (1963-Aug-02) JPL Horizons daily output for 1950 to 2099
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