50000 Quaoar

50000 Quaoar
	Quaoar and its moon Weywot, imaged by the Hubble Space Telescope
Discovery[1]
Discovered by	Chad Trujillo, Michael Brown
Discovery date	2002 Jun 05 10:48:08 PDT on an image taken 2002 June 04 05:41:40 UT
Designations
Alternative designations	2002 LM60
Minor planet category	Cubewano[2][3]
Orbital characteristics[4]
	Epoch May 18, 2008 (JD 2 454 600.5)
Aphelion	6.716 275 Tm (45.286 AU)
Perihelion	6.270 316 Tm (41.928 AU)
Semi-major axis	6.493 296 Tm (43.607 AU)
Eccentricity	0.038 4
Orbital period	105 181.6 d (287.97 a)
Average orbital speed	4.52 km/s
Mean anomaly	284.861°
Inclination	7.988°
Longitude of ascending node	188.893°
Argument of perihelion	148.508°
Physical characteristics
Dimensions	1260 ± 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
Geometric albedo	0.088 +0.021; −0.012 [5] ; 0.198 6 +0.13; −0.07 [6]
Temperature	~43 K
Spectral type	(moderately red) B-V=0.94, V-R=0.65
Absolute magnitude (H)	2.6

50000 Quaoar (symbol: ) is a Trans-Neptunian object and is also a dwarf planet. It was discovered on June 4, 2002 by Chad Trujillo and Michael Brown at the California Institute of Technology.

References

"Frequently Asked Questions About Quaoar". Archived from the original on 2010-01-17. Retrieved 2009-02-19.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
Buie, Marc W. (2006-05-17). "Orbit Fit and Astrometric record for 50000". SwRI (Space Science Department). Retrieved 2008-09-19.
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.
"Asteroid Data Services by Lowell Observatory". Archived from the original on 2007-06-21. Retrieved 2020-09-14.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
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)
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

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