7476 Ogilsbie
| Discovery [1] | |
|---|---|
| Discovered by | T. B. Spahr |
| Discovery site | Catalina Station |
| Discovery date | 14 April 1993 |
| Designations | |
| MPC designation | 7476 Ogilsbie |
Named after |
Brian Ogilsbie (friend of discoverer)[2] |
| 1993 GE · 1971 HU | |
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.17 yr (23,072 days) |
| Aphelion | 3.8707 AU |
| Perihelion | 2.4301 AU |
| 3.1504 AU | |
| Eccentricity | 0.2286 |
| 5.59 yr (2,042 days) | |
| 49.589° | |
| 0° 10m 34.68s / day | |
| Inclination | 25.776° |
| 57.498° | |
| 145.36° | |
| Physical characteristics | |
| Dimensions |
18.996±0.118 km[4] 27.90 km (calculated)[3] |
| 3.92±0.01 h[5] | |
|
0.1500±0.0264[4] 0.057 (assumed)[3] | |
| C [3] | |
|
11.5[1][3] 11.3[4] | |
|
| |
7476 Ogilsbie, provisional designation 1993 GE, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered by American astronomer Timothy Spahr at the U.S. Catalina Station in Tucson, Arizona, on 14 April 1993.[6]
The C-type asteroid orbits the Sun at a distance of 2.4–3.9 AU once every 5 years and 7 months (2,042 days). Its orbit has an eccentricity of 0.23 and an inclination of 26° with respect to the ecliptic.[1] The first used precovery was obtained at Palomar Observatory in 1990, extending the asteroid's observation arc by 3 years prior to its discovery. The first (unused) observation at Palomar dates back to 1953.[6]
In 2010, a photometric light-curve analysis by Italian astronomer Andrea Ferrero at the Bigmuskie Observatory (B88) in Mombercelli, Italy, rendered a well-defined rotation period of 3.92±0.01 hours with a brightness amplitude of 0.40 in magnitude (U=3).[5] According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid has a diameter of 19.0 kilometer based on an albedo of 0.15,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and hence calculates a larger diameter of 27.9 kilometers.[3]
The minor planet was named in memory of Brian K. Ogilsbie (1970–1997). School mate and good friend, he is well remembered by the discoverer for the long talks they had on their excursions.[2] Naming citation was published on 27 April 2002 (M.P.C. 45336).[7]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 7476 Ogilsbie (1993 GE)" (2016-03-12 last obs.). Jet Propulsion Laboratory. Retrieved 17 May 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (7476) Ogilsbie. Springer Berlin Heidelberg. p. 599. ISBN 978-3-540-00238-3. Retrieved 1 February 2016.
- 1 2 3 4 5 6 "LCDB Data for (7476) Ogilsbie". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
- 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407
. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016. - 1 2 Ferrero, Andrea (October 2010). "Lightcurve Determination of 2954 Delsemme, 3305 Ceadams and 7476 Ogilsbie". The Minor Planet Bulletin. 37 (4): 145. Bibcode:2010MPBu...37..145F. ISSN 1052-8091. Retrieved 17 May 2016.
- 1 2 "7476 Ogilsbie (1993 GE)". Minor Planet Center. Retrieved 1 February 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 7476 Ogilsbie at the JPL Small-Body Database
