4954 Eric

4954 Eric

Orbit diagram of 4954 Eric with location of object on June 18, 2013
Discovery[1]
Discovery date 23 September 1990
Designations
MPC designation 1990 SQ
MPO 328722
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 14681 days (40.19 yr)
Aphelion 2.8993 AU (433.73 Gm)
Perihelion 1.10393 AU (165.146 Gm)
2.0016 AU (299.44 Gm)
Eccentricity 0.44848
2.83 yr (1034.4 d)
314.18°
 20m 52.944s / day
Inclination 17.4461°
358.52°
52.429°
Earth MOID 0.194843 AU (29.1481 Gm)
Jupiter MOID 2.70197 AU (404.209 Gm)
Jupiter Tisserand parameter 3.657
Physical characteristics
Dimensions 10.8 km
Mean radius
5.4 km
12.052[3] hours
B-type asteroid[4]
12.6

    4954 Eric (or 1990 SQ) is an Amor asteroid with a diameter of 10.8 km that was discovered by American astronomer Brian P. Roman on 1990 September 23.[5] It was named after its discoverer's son, Eric Roman. The asteroid has a rotation period of 12.05 hours.[3]

    It is the largest near-Earth asteroid discovered since 3552 Don Quixote in 1983.[2] On 2007 October 11 the asteroid passed 0.2865 AU (42,860,000 km; 26,630,000 mi) from Earth.[5] It currently makes closer approaches to Mars than it does Earth.

    Other large near-Earth asteroids include: 1036 Ganymed (32 km), 3552 Don Quixote (19 km), 433 Eros (17 km), and 1866 Sisyphus (8.5 km).[2][6]

    References

    1. "(4954) Eric = 1990 SQ". Minor Planet Center. Retrieved 2015-06-04.
    2. 1 2 3 "JPL Small-Body Database Search Engine: asteroids and NEOs and H < 13 (mag)". JPL Solar System Dynamics. Retrieved 2013-04-11.
    3. 1 2 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:1301.6943Freely accessible, Bibcode:2013A&A...551A..67H, doi:10.1051/0004-6361/201220701.
    4. based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)
    5. 1 2 "JPL Close-Approach Data: 4954 Eric (1990 SQ)" (2012-09-04 last obs). Retrieved 2013-10-30.
    6. N. McBride and I. Gilmour - An Introduction to the Solar System (2004) - Page 394

    External links


    This article is issued from Wikipedia - version of the 10/14/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.