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Ceres
Ceres as seen by Hubble Space Telescope (ACS). The contrast has been enhanced to reveal surface details.
Discovery[1]
Discovered byGiuseppe Piazzi
Discovery dateJanuary 1, 1801
Designations
Designation
1 Ceres
A899 OF; 1943 XB
dwarf planet
main belt
AdjectivesCererian, Cerian
Symbol
Orbital characteristics
Epoch November 26, 2005
(JD 2453700.5)[2]
Aphelion447,838,164 km
2.987 AU
Perihelion381,419,582 km
2.545 AU
414,703,838 km
2.765 956 424 AU[3]
Eccentricity0.07976017[3]
1679.819 days
4.599 years
17.882 km/s
108.509°
Inclination10.586712°[3]
80.40696°[3]
73.15073°[3]
Physical characteristics
Equatorial radius
487.3 ± 1.8 km[4]
Polar radius
454.7 ± 1.6 km[4]
Mass9.43 ± 0.07×1020 kg[5]
Mean density
2.077 ± 0.036 g/cm³[4]
0.27 m/s²
0.028 g[6]
0.51 km/s[6]
0.3781 d
9.074170 h[7][8]
about 3°[4]
North pole right ascension
19 h 24 min
291°[4]
North pole declination
59°[4]
Albedo0.090 ± 0.0033 (V-band geometric)[9]
Surface temp. min mean max
Kelvin ? ~167 K[10] 239 K[10]
Spectral type
C[11]
6.7[12] to 9.32[13]
3.36 ± 0.02[9]
0.84"[14] to 0.33"[6]
  1. ^ Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 15. ISBN 3-540-00238-3. Retrieved 2008-12-30.
  2. ^ Bowell, Ted; Koehn, Bruce (January 2, 2003). "Asteroid Observing Services". Lowell Observatory. Retrieved 2007-01-17.{{cite web}}: CS1 maint: multiple names: authors list (link)
  3. ^ a b c d e Yeomans, Donald K. (July 5, 2007). "1 Ceres". JPL Small-Body Database Browser. Retrieved 2007-07-05.—The listed values were rounded at the magnitude of uncertainty (1-sigma).
  4. ^ a b c d e f Cite error: The named reference Thomas2005 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Carry2008 was invoked but never defined (see the help page).
  6. ^ a b c Calculated based on the known parameters
  7. ^ Cite error: The named reference NSSDC was invoked but never defined (see the help page).
  8. ^ Chamberlain, Matthew A.; Sykes, Mark V.; Esquerdo, Gilbert A. (2007). "Ceres lightcurve analysis – Period determination". Icarus. 188 (2): 451–456. Bibcode:2007Icar..188..451C. doi:10.1016/j.icarus.2006.11.025.{{cite journal}}: CS1 maint: date and year (link)
  9. ^ a b Cite error: The named reference Li2006 was invoked but never defined (see the help page).
  10. ^ a b Saint-Pé, O.; Combes, M.; Rigaut, F. (1993). "Ceres surface properties by high-resolution imaging from Earth". Icarus. 105 (2): 271–281. Bibcode:1993Icar..105..271S. doi:10.1006/icar.1993.1125.{{cite journal}}: CS1 maint: date and year (link)
  11. ^ Cite error: The named reference Rivkin2006 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Pasachoff1983 was invoked but never defined (see the help page).
  13. ^ APmag and AngSize generated with Horizons (Ephemeris: Observer Table: Quantities = 9,13,20,29)
  14. ^ Ceres Angular Size @ Feb 2009 Opposition: 974 km diam. / (1.58319 AU * 149 597 870 km) * 206265 = 0.84"