 Shape model of Eric from its lightcurve | |
| Discovery1 | |
|---|---|
| Discovered by | Brian P. Roman |
| Discovery site | Palomar Obs. |
| Discovery date | 23 September 1990 |
| Designations | |
| 1990 SQ | |
| Orbital characteristics2 | |
| 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) |
| Physical characteristics | |
| Dimensions | 10.8 km |
| 5.4 km | |
| 12.0523 hours | |
| S (SMASSII) | |
| 12.6 | |
4954 Eric (prov. designation: 1990 SQ) is an eccentric, stony asteroid, classified as near-Earth object of the Amor group, approximately 11 kilometers (6.8 miles) in diameter. It was discovered by American astronomer Brian Roman at Palomar Observatory on 23 September 1990.4 The asteroid was named after its discoverer's son, Eric Roman.
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.4 It currently makes closer approaches to Mars than it does Earth. The asteroid has a rotation period of 12.05 hours.3
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).25
References
References
- "(4954) Eric = 1990 SQ". Minor Planet Center. Retrieved 4 June 2015.
- "JPL Small-Body Database Search Engine: asteroids and NEOs and H < 13 (mag)". JPL Solar System Dynamics. Retrieved 11 April 2013.
- Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; Warner, B. D.; Pilcher, F.; 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 and Astrophysics. 551: 16. arXiv:1301.6943. Bibcode:2013A&A...551A..67H. doi:10.1051/0004-6361/201220701. S2CID 118627434.
- "JPL Close-Approach Data: 4954 Eric (1990 SQ)" (2012-09-04 last obs). Retrieved 30 October 2013.
- Philip A. Bland; Elaine A. Moore; Ian Wright; Mike Widdowson (2004). An Introduction to the Solar System. Cambridge University Press. p. 394. ISBN 978-0-521-54620-1.
External links
External links
- 4954 Eric at NeoDyS-2, Near Earth Objects—Dynamic Site
- 4954 Eric at the JPL Small-Body Database