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° | |
| 0° 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 | |
|
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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
- ↑ "(4954) Eric = 1990 SQ". Minor Planet Center. Retrieved 2015-06-04.
- 1 2 3 "JPL Small-Body Database Search Engine: asteroids and NEOs and H < 13 (mag)". JPL Solar System Dynamics. Retrieved 2013-04-11.
- 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:1301.6943, Bibcode:2013A&A...551A..67H, doi:10.1051/0004-6361/201220701.
- ↑ based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)
- 1 2 "JPL Close-Approach Data: 4954 Eric (1990 SQ)" (2012-09-04 last obs). Retrieved 2013-10-30.
- ↑ N. McBride and I. Gilmour - An Introduction to the Solar System (2004) - Page 394
External links
- 4954 Eric at the JPL Small-Body Database
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