3202 Graff
| Discovery | |
|---|---|
| Discovered by | M. F. Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 3 January 1908 |
| Designations | |
| MPC designation | 3202 Graff |
|
Named after
|
Gareth V. Williams (astronomer) |
| A908 AA · 1981 ES13 | |
| main-belt · Hilda | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.78 yr (39,733 days) |
| Aphelion | 4.3889 AU |
| Perihelion | 3.4837 AU |
| 3.9363 AU | |
| Eccentricity | 0.1150 |
| 7.81 yr (2,853 days) | |
| 269.86° | |
| 0° 7m 34.32s / day | |
| Inclination | 11.107° |
| 205.14° | |
| 268.83° | |
| Physical characteristics | |
| Dimensions |
35.914±0.244 36.78 km (calculated) |
| 17.32±0.02 h | |
|
0.055±0.013 0.057 (assumed) |
|
| D · C | |
| 10.9 · 11.31±0.28 | |
3202 Graff, provisional designation A908 AA, is a carbonaceous Hilda asteroid from the outermost region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 3 January 1908, by German astronomer Max Wolf at Heidelberg Observatory in southern Germany.
The dark C-type asteroid is classified as a rare D-type by Pan-STARRS' large-scale survey, and belongs to the Hilda family of asteroids, which are in a 3:2 orbital resonance with the giant planet Jupiter. It orbits the Sun at a distance of 3.5–4.4 AU once every 7 years and 10 months (2,853 days). Its orbit has an eccentricity of 0.12 and an inclination of 11° with respect to the ecliptic. The asteroid's observation arc begins 3 weeks after its discovery with its first used observation at Heidelberg.
In July 2015, a rotational light-curve for this asteroid was obtained by astronomer Robert Stephens at the Center for Solar System Studies. It gave a well-defined rotation period of 17.32±0.02 hours with a brightness variation of 0.18 in magnitude (U=3-). According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 35.9 kilometers in diameter and its surface has an albedo of 0.055. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 36.8 kilometers based on an absolute magnitude of 10.9.
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