| Discovery[1] | |
|---|---|
| Discovered by | T. B. Spahr |
| Discovery site | Catalina Stn. |
| Discovery date | 14 April 1993 |
| Designations | |
| (7476) Ogilsbie | |
Named after | Brian Ogilsbie (friend of discoverer)[2] |
| 1993 GE · 1971 HU | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.82 yr (23,312 days) |
| Aphelion | 3.8716AU |
| Perihelion | 2.4313 AU |
| 3.1514 AU | |
| Eccentricity | 0.2285 |
| 5.59yr (2,043 days) | |
| 120.00° | |
| 0° 10m 34.32s / day | |
| Inclination | 25.775° |
| 57.490° | |
| 145.45° | |
| Physical characteristics | |
| Dimensions | 18.494±0.199[4] 18.996±0.118 km[5] 27.90 km(calculated)[3] |
| 3.92±0.01h[6] | |
| 0.057(assumed)[3] 0.1500±0.0264[5] 0.180±0.020[4] | |
| C[3] | |
| 11.5[1][3] · 11.3[5] | |
7476 Ogilsbie, provisional designation1993 GE, is a carbonaceousasteroid from the outer region of theasteroid belt, approximately 20 kilometers in diameter. It was discovered by American astronomerTimothy Spahr at the U.S.Catalina Station in Tucson, Arizona, on 14 April 1993.[7]
Ogilsbie orbits the Sun in theouter main-belt at a distance of 2.4–3.9 AU once every 5 years and 7 months (2,043 days). Its orbit has aneccentricity of 0.23 and aninclination of 26° with respect to theecliptic.[1] The first usedprecovery was obtained atPalomar Observatory in 1990, extending the asteroid'sobservation arc by 3 years prior to its discovery. The first (unused) observation at Palomar dates back to 1953.[7]
In 2010, a photometriclightcurve analysis by Italian astronomer Andrea Ferrero at the Bigmuskie Observatory (B88) in Mombercelli, Italy, rendered a well-definedrotation period of3.92±0.01 hours with a brightness amplitude of 0.40 inmagnitude (U=3).[6]
According to the survey carried out by theNEOWISE mission of NASA's space-basedWide-field Infrared Survey Explorer,Ogilsbie has a diameter of 18.5 and 19.0 kilometer based on analbedo of 0.15 and 0.18, respectively,[5][4] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo forcarbonaceous asteroids of 0.057 and hence calculates a larger diameter of 27.9 kilometers.[3]
Thisminor 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] The official naming citation was published by theMinor Planet Center on 27 April 2002 (M.P.C. 45336).[8]
