(9921) 1981 EO18

From Wikipedia, the free encyclopedia
Jump to: navigation, search
(9921) 1981 EO18
AnimatedOrbitOf99211981EO18.gif
Orbit of (9921) 1981 EO18 (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter.
Discovery and designation
Discovered by S. J. Bus
Discovery date March 2, 1981
Designations
MPC designation (9921) 1981 EO18
Minor planet category Main Belt asteroid
Orbital characteristics
Epoch October 27, 2007
Aphelion 2.5177340 AU
Perihelion 2.2375754 AU
Semi-major axis 2.3776547 AU
Eccentricity 0.0589149
Orbital period 1339.1264937 d
Mean anomaly 202.94141°
Inclination 2.39925°
Longitude of ascending node 331.52802°
Argument of perihelion 88.95675°
Physical characteristics
Dimensions ~12.3 km[1]
Geometric albedo ~0.01
Surface temp. min mean max
Kelvin
Celsius
Absolute magnitude (H) 14.3


(9921) 1981 EO18 is a main belt asteroid. It orbits the Sun once every 3.67 years.[2]

Discovered on March 2, 1981 by Schelte Bus at the Siding Spring Observatory, it was given the provisional designation "1981 EO18".[3]

References[edit]

  1. ^ Tedesco E.F., Noah P.V., Noah M., Price S.D. "The supplemental IRAS minor planet survey (SIMPS)". 
  2. ^ "9921 (1981 EO18)". JPL Small-Body Database Browser. JPL/NASA. Retrieved 2008-01-31. 
  3. ^ (9921) 1981 EO18 Minor Planet Center's Minor Planet Ephemeris Service