1999 LE31

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1999 LE31
1999 LE31 asteroid - orbit diagram 01.jpg
Diagram of the orbit of 1999 LE31
Discovery and designation
Discovered by Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro
Discovery date June 12, 1999
MPC designation 21708
Minor planet category damocloid
Orbital characteristics
Epoch 2455800.5 (2011 Aug 27.0)
Aphelion 11.919 AU
Perihelion 4.3215 AU
8.1207 AU
8452 days
Inclination 151.82407° (retrograde)
Physical characteristics

1999 LE31 is a damocloid centaur[2] discovered on June 12, 1999.[3]

It is both a Jupiter- and Saturn-crossing minor planet.[4]

1999 LE31 is located in the outer Solar System between Jupiter and Neptune,[5] and like all centaurs, has an unstable orbit caused by the gravitational influence of the giant planets. Due to this, it must have originated from elsewhere, most likely outside Neptune.[5]

This asteroid is extremely rare due to the fact that, while over half a million such minor planets are known, 1999 LE31 is one of only 36 that has a retrograde orbit.

1999 LE31 is approximately 16.8 km in diameter.[3]


This asteroid has been recorded at such observatories as:[1]

See also[edit]


  1. ^ a b "MPEC 1999-M29 : 1999 LE31". Minorplanetcenter.org. Retrieved 2011-07-11. 
  2. ^ JPL Small-Body Database Browser
  3. ^ a b "BAA Comet Section Comets of 1999". Ast.cam.ac.uk. Retrieved 2011-07-11. 
  4. ^ 1999 LE31 approaches to Jupiter and Saturn
  5. ^ a b Horner, J.; Evans, N.W.; Bailey, M. E. (2004). "Simulations of the Population of Centaurs I: The Bulk Statistics". Monthly Notices of the Royal Astronomical Society 354 (3): 798–810. arXiv:astro-ph/0407400. Bibcode:2004MNRAS.354..798H. doi:10.1111/j.1365-2966.2004.08240.x. 

External links[edit]