2751 Campbell
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| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 7 September 1962 |
| Designations | |
| (2751) Campbell | |
Named after | William Wallace Campbell (American astronomer)[2] |
| 1962 RP · 1973 RD 1975 EO2 · 1977 RN6 1981 WF4 | |
| main-belt · Nysa[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 54.74 yr (19,995 days) |
| Aphelion | 2.8245 AU |
| Perihelion | 1.9880 AU |
| 2.4062 AU | |
| Eccentricity | 0.1738 |
| 3.73 yr (1,363 days) | |
| 191.78° | |
| 0° 15m 50.76s / day | |
| Inclination | 1.4901° |
| 246.29° | |
| 201.65° | |
| Physical characteristics | |
| Dimensions | 5.73±1.14 km[4] 6.907±0.287 km[5][6] 7.46 km (calculated)[3] |
| 2.747±0.001 h[7] | |
| 0.20 (assumed)[3] 0.281±0.011[5][6] 0.30±0.14[4] | |
| S[3] | |
| 12.75±0.31[8] · 12.8[5] · 13.0[1][3] · 13.34[4] | |
2751 Campbell, provisional designation 1962 RP, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.
It was discovered on 7 September 1962, by IU's Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States.[9] It is named for American astronomer William Wallace Campbell.[2]
Campbell is a member of the stony subgroup of the Nysa family (FIN: 405), a group of asteroids in the inner main-belt not far from the Kirkwood gap at 2.5 AU, a depleted zone where a 3:1 orbital resonance with the orbit of Jupiter exists. The Nysian group is named after its largest member 44 Nysa.
It orbits the Sun in the inner main-belt at a distance of 2.0–2.8 AU once every 3 years and 9 months (1,363 days). Its orbit has an eccentricity of 0.17 and an inclination of 1° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made.[9]
Physical characteristics
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Campbell measures 5.73 and 6.907 kilometers in diameter, and its surface has an albedo of 0.30 and 0.281, respectively,[4][5][6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a larger diameter of 7.46 kilometers, with an absolute magnitude of 13.0.[3] Campbell is an assumed S-type asteroid.[3]
Rotation and shape
In November 2007, a rotational lightcurve of Campbell was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a rotation period of 2.747 hours with a brightness variation of 0.08 magnitude, which indicates, that the body has a nearly spheroidal shape (U=3-).[7]
