54598 Bienor

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54598 Bienor
Discovered by M. W. Buie, S. D. Kern, R. L. Millis, L. H. Wasserman
Discovery date August 27, 2000
2000 CQ243
Orbital characteristics
Epoch June 14, 2006 (JD 2453900.5)
Aphelion 19.779 AU (2958.869 Gm)
Perihelion 13.165 AU (1969.451 Gm)
16.472 AU (2464.160 Gm)
Eccentricity 0.201
66.85 a (24418.202 d)
7.26 km/s
Inclination 20.762°
Physical characteristics
Dimensions 207±30 km[1]
9.14 h[2]
Albedo 0.03–0.05[1]
Temperature ~69 K

54598 Bienor (/bɨ.ˈnɔr/ bi-YEE-nor; from Greek: Βιάνωρ Bianor) is a centaur that grazes the orbit of Uranus. It is named after the mythological Centaur Bienor. Its closest approach to the Sun (perihelion) is 13.2 AU.[2] As of 2012, Bienor is currently 16.9 AU from the Sun[3] and will reach perihelion in 2027.[2]

Mike Brown's website lists it as a possible dwarf planet with a measured diameter of 206 kilometres (128 mi).[4] Other centaurs with measured diameters listed as possible dwarf planets include 10199 Chariklo and 2060 Chiron.[4]

See also[edit]


  1. ^ a b Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) Preprint arXiv
  2. ^ a b c d "JPL Small-Body Database Browser: 54598 Bienor (2000 QC243)" (2011-10-19 last obs). Jet Propulsion Laboratory. Retrieved 2012-01-16. 
  3. ^ a b "AstDyS (54598) Bienor Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-01-16. 
  4. ^ a b Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2012-01-16. 

External links[edit]