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17 Thetis

asteroid

17 Thetis is a lairge main-belt asteroid that wis discovered bi R. Luther on Aprile 17, 1852.

17 Thetis
Star field shawin asteroid Thetis in the center
Discovery
Discovered biR. Luther
Discovery dateAprile 17, 1852
Designations
Pronunciation/ˈθts/ THEE-tis
Named after
Thetis
A913 CA; A916 YF;
1954 SO1
Main belt
AdjectivesThetidian
Orbital chairactereestics[1]
Epoch October 22, 2004 (JD 2453300.5)
Aphelion419.069 Gm (2.801 AU)
Perihelion319.991 Gm (2.139 AU)
369.530 Gm (2.470 AU)
Eccentricity0.134
1418.027 d (3.88 a)
18.87 km/s
38.435°
Inclination5.587°
125.622°
135.906°
Pheesical chairacteristics
Dimensions90 ± 3.7 km (IRAS)[1]
Mass1.2×1018 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]
Albedo0.1715[1][5]
Temperatur~173 K
Spectral teep
S[1]
9.89 to 13.51[6]
7.76[1]

References

eedit
  1. a b c d e f "JPL Small-Body Database Browser: 17 Thetis". 4 August 2008. Retrieved 12 November 2008.
  2. 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.
  3. (Mass o Thetis 0.00617 / Mass o Ceres 4.75) * Mass o Ceres 9.43E+20 = 1.224E+18
  4. "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
  5. "Asteroid Data Archive". Planetary Science Institute. Archived frae the original on 23 Juin 2006. Retrieved 3 November 2008.
  6. apmag 9.89 (1977-Jul-25) to 13.51 (1963-Aug-02) JPL Horizons daily output for 1950 to 2099