Ceres (dwarf planet)

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Ceres ⚳
Ceres - RC3 - Haulani Crater (22381131691) (cropped).jpg
A view o Ceres in naitural colour, picturt bi the Dawn spacecraft in Mey 2015.[lower-alpha 1]
Discovery[1]
Discovered bi Giuseppe Piazzi
Discovery date 1 Januar 1801
Designations
MPC designation 1 Ceres
Pronunciation /ˈsɪərz/ SEER-eez
Named after
Cerēs
A899 OF; 1943 XB
dwarf planet
main belt
Adjectives Cererian /sɨˈrɪəri.ən/
or Cererean /sɛrɨˈriːən/[2]
Orbital chairactereestics[4]
Epoch 2013-Nov-04
(JD 2456600.5)
Aphelion 445280000 km
(2.9765 AU)
Perihelion 382520000 km
(2.5570 AU)
413910000 km
(2.7668 AU)
Eccentricity 0.075797
4.60 yr
1680.99 d
466.7 d
1.278 yr
17.882 km/s
10.557°
Inclination 10.593° tae Ecliptic
9.20° tae Invariable plane[3]
80.3276°
72.2921°
Satellites None
Proper orbital elements[5]
2.7670962 AU
0.1161977
9.6474122°
78.193318 deg / yr
4.60397 yr
(1681.601 d)
Precession o perihelion
54.070272 arcsec / yr
Precession of the ascending node
−59.170034 arcsec / yr
Pheesical chairacteristics
Mean radius
476.2 ± ?? km[6]
Equatorial radius
487.3±1.8 km[7]
Polar radius
454.7±1.6 km[7]
2850000 km2
Mass

(9.43±0.07)×1020 kg,[8] 9.47±??[6]

0.00015 Yirds
0.0128 Muins
Mean density
2.077±0.036 g/cm3,[7] 2.09±??[6]
0.28 m/s2[6]
0.029 g
0.51 km/s[9]
0.3781 d
9.074170±0.000002 h[10]
≈ 3°[7]
North pole right ascension
19h 24m
291°[7]
North pole declination
59°[7]
Albedo 0.090±0.0033 (V-band geometric)[11]
Surface temp. min mean max
Kelvin ? ≈ 168 K[15] 235 K[16]
Spectral teep
C[12]
6.64[13] tae 9.34[14]
3.36±0.02[11]
0.854″ to 0.339″

Ceres (minor-planet designation 1 Ceres) /ˈsɪərz/ (SEER-eez)[17] is the lairgest object in the asteroid belt, which lies atween the orbits o Maurs an Jupiter.

Notes[eedit | eedit soorce]

  1. This image wis taken bi the Dawn spacecraft on 2 Mey 2015, during a "rotation chairacterisation" orbit, 13,642 kilometres (8,477 mi) abuin the surface o Ceres. Veesible at centre an centre richt are twa bricht spots, a phenomenon common on Ceres, in Oxo an Haulani craters respectively. Ahuna Mons is an aa veesible in the image as a noticeable, bluff hill, seen juist richt o bottom.

References[eedit | eedit soorce]

  1. Schmadel, Lutz (2003). Dictionary of minor planet names (5th ed.). Germany: Springer. p. 15. ISBN 978-3-540-00238-3. 
  2. Simpson, D. P. (1979). Cassell's Latin Dictionary (5th ed.). London: Cassell Ltd. p. 883. ISBN 978-0-304-52257-6. 
  3. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 3 Aprile 2009. Archived frae the oreeginal on 14 Mey 2009. Retrieved 10 Aprile 2009.  (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane)
  4. "1 Ceres". JPL Small-Body Database Browser. Archived frae the oreeginal on 4 August 2012. Retrieved 3 December 2013. 
  5. "AstDyS-2 Ceres Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Archived frae the oreeginal on 5 October 2011. Retrieved 1 October 2011. 
  6. 6.0 6.1 6.2 6.3 "Ceres". NASA fact sheet. NASA. 2014-04-02. Retrieved 2014-05-04. 
  7. 7.0 7.1 7.2 7.3 7.4 7.5 Thomas, P. C.; Parker, J. Wm.; McFadden, L. A.; et al. (2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–226. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID 16148926. 
  8. Carry, Benoit; et al. (2007). "Near-Infrared Mapping and Physical Properties of the Dwarf-Planet Ceres" (PDF). Astronomy & Astrophysics. 478 (1): 235–244. arXiv:0711.1152Freely accessible. Bibcode:2008A&A...478..235C. doi:10.1051/0004-6361:20078166. 
  9. Calculated based on the known parameters
  10. 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. 
  11. 11.0 11.1 Li, Jian-Yang; McFadden, Lucy A.; Parker, Joel Wm. (2006). "Photometric analysis of 1 Ceres and surface mapping from HST observations". Icarus. 182 (1): 143–160. Bibcode:2006Icar..182..143L. doi:10.1016/j.icarus.2005.12.012. Retrieved 8 December 2007. 
  12. Rivkin, A. S.; Volquardsen, E. L.; Clark, B. E. (2006). "The surface composition of Ceres:Discovery of carbonates and iron-rich clays" (PDF). Icarus. 185 (2): 563–567. Bibcode:2006Icar..185..563R. doi:10.1016/j.icarus.2006.08.022. Retrieved 8 December 2007. 
  13. Menzel, Donald H.; and Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 978-0-395-34835-2. 
  14. APmag and AngSize generated with Horizons (Ephemeris: Observer Table: Quantities = 9,13,20,29) Archived 5 October 2011 at WebCite
  15. Angelo, Joseph A., Jr (2006). Encyclopedia of Space and Astronomy. New York: Infobase. p. 122. ISBN 0-8160-5330-8. 
  16. Saint-Pé, O.; Combes, N.; 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. 
  17. "Ceres". Dictionary.com. Random House, Inc. Archived frae the oreeginal on 5 October 2011. Retrieved 26 September 2007.