17 Thetis

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17 Thetis 17 Thetis symbol.png
17Thetis-LB1.jpg
Star field shawin asteroid Thetis in the center
Discovery
Discovered bi R. Luther
Discovery date Aprile 17, 1852
Designations
Pronunciation /ˈθts/ 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)
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]

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

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 17 Thetis". 2008-08-04 last obs. Retrieved 2008-11-12.  Check date values in: |date= (help)
  2. 2.0 2.1 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. Retrieved 2008-11-12. 
  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 2005-11-27. Retrieved 2008-11-03. 
  5. "Asteroid Data Archive". Planetary Science Institute. Archived frae the original on 2006-06-23. Retrieved 2008-11-03. 
  6. apmag 9.89 (1977-Jul-25) to 13.51 (1963-Aug-02) JPL Horizons daily output for 1950 to 2099