4954 Eric

From Wikipedia, the free encyclopedia
Jump to: navigation, search
4954 Eric
Eric June 18 2013.gif
Orbit diagram of 4954 Eric with location of object on June 18, 2013
Discovery
Discovery date September 23, 1990
Orbital characteristics
Aphelion 2.8998 AU
Perihelion 1.10325 AU
2.0015 AU
Eccentricity 0.44879
2.83 yr
Inclination 17.4465 deg
Physical characteristics
Dimensions 10.8 km
12.052[1] hours
Spectral type
B-type asteroid[2]
12.6

4954 Eric is an Amor asteroid with a diameter of 10.8km that was discovered by American astronomer Brian P. Roman on 1990 September 23.[3] It was named after its discoverer's son, Eric Roman. The asteroid has a rotation period of 12.05 hours.[1]

It is the largest near-Earth asteroid discovered since 3552 Don Quixote in 1983.[4] On 2007 October 11 the asteroid passed 0.2865 AU (42,860,000 km; 26,630,000 mi) from Earth.[3] It currently makes closer approaches to Mars than it does Earth.

Other large near-Earth asteroids include: 1036 Ganymed (32km), 3552 Don Quixote (19km), 433 Eros (17km), and 1866 Sisyphus (8.5km).[4][5]

References[edit]

  1. ^ a b Hanuš, J. et al. (March 2013), "Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution", Astronomy & Astrophysics 551: A67, arXiv:1301.6943, Bibcode:2013A&A...551A..67H, doi:10.1051/0004-6361/201220701. 
  2. ^ based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)
  3. ^ a b "JPL Close-Approach Data: 4954 Eric (1990 SQ)". 2012-09-04 last obs. Retrieved 2013-10-30. 
  4. ^ a b "JPL Small-Body Database Search Engine: asteroids and NEOs and H < 13 (mag)". JPL Solar System Dynamics. Retrieved 2013-04-11. 
  5. ^ N. McBride and I. Gilmour - An Introduction to the Solar System (2004) - Page 394