50000 Quaoar

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50000 Quaoar
Quaoar PRC2002-17e.jpg
Sum of 16 Hubble exposures registered on Quaoar.
Discovery[1]
Discovered byChad Trujillo, Michael Brown
Discovery date2002 Jun 05 10:48:08 PDT on an image taken 2002 June 04 05:41:40 UT
Designations
2002 LM60
Cubewano[2][3]
Orbital characteristics[4]
Epoch May 18, 2008 (JD 2 454 600.5)
Aphelion6.716 275 Tm (45.286 AU)
Perihelion6.270 316 Tm (41.928 AU)
6.493 296 Tm (43.607 AU)
Eccentricity0.038 4
105 181.6 d (287.97 a)
4.52 km/s
284.861°
Inclination7.988°
188.893°
148.508°
Physical characteristics
Dimensions1260 ± 190 km (direct)[5]
844+207
−190
km (thermal)[6]
Mass(1.0–2.6)×1021 kg
Mean density
2.0? g/cm³
Equatorial surface gravity
0.276–0.376 m/s²
Equatorial escape velocity
0.523–0.712 km/s
0.088 +0.021
−0.012
[5]
0.198 6 +0.13
−0.07
[6]
Temperature~43 K
(moderately red) B-V=0.94, V-R=0.65
2.6

50000 Quaoar is a Trans-Neptunian object and could be a dwarf planet. It was found on June 4, 2002 by Chad Trujillo and Michael Brown at the California Institute of Technology.

References[change | change source]

  1. Frequently Asked Questions About Quaoar Archived 17 January 2010 at WebCite
  2. Buie, Marc W. (2006-05-17). "Orbit Fit and Astrometric record for 50000". SwRI (Space Science Department). Retrieved 2008-09-19.
  3. Marsden, Brian G. (2008-07-17). "MPEC 2008-O05 : Distant Minor Planets (2008 Aug. 2.0 TT)". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Archived from the original on 2012-04-09. Retrieved 2008-10-01. Cite uses deprecated parameter |deadurl= (help)
  4. Asteroid Data Services by Lowell Observatory Archived 20 June 2007 at WebCite
  5. 5.0 5.1 Brown, Michael E. and Chadwick A. Trujillo (2004). "Direct Measurement of the Size of the Large Kuiper Belt Object (50000) Quaoar". The Astronomical Journal 127 (7018): 2413–2417. doi:10.1086/382513.  Reprint on Brown's site (pdf)
  6. 6.0 6.1 Stansberry J., Grundy W., Brown M, Cruikshank D., Spencer J., Trilling D., Margot J-L Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope To Appear in: Kuiper Belt (M.A. Barucci et al., Eds.) U. Arizona Press, 2007 Preprint

Other websites[change | change source]