|Discovered by||M. W. Buie, S. D. Kern, R. L. Millis, L. H. Wasserman|
|Discovery date||August 27, 2000|
|Minor planet category||Centaur|
|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)|
|66.85 a (24418.202 d)|
Average orbital speed
Sidereal rotation period
54598 Bienor (// 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. As of 2012[update], Bienor is currently 16.9 AU from the Sun and will reach perihelion in 2027.
Mike Brown's website lists it as a possible dwarf planet with a measured diameter of 206 kilometres (128 mi). Other centaurs with measured diameters listed as possible dwarf planets include 10199 Chariklo and 2060 Chiron.
- Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) Preprint arXiv
- "JPL Small-Body Database Browser: 54598 Bienor (2000 QC243)". Jet Propulsion Laboratory. 2011-10-19 last obs. Retrieved 2012-01-16.
- "AstDyS (54598) Bienor Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-01-16.
- Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2012-01-16.
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