6398 Timhunter
| Discovery | |
|---|---|
| Discovered by |
C. S. Shoemaker E. M. Shoemaker D. H. Levy |
| Discovery site | Palomar Obs. |
| Discovery date | 10 February 1991 |
| Designations | |
| MPC designation | 6398 Timhunter |
|
Named after
|
Tim Hunter (amateur astronomer) |
|
1991 CD1 · 1955 DB 1988 PG |
|
| main-belt · Phocaea | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 61.26 yr (22,375 days) |
| Aphelion | 2.8682 AU |
| Perihelion | 1.8175 AU |
| 2.3429 AU | |
| Eccentricity | 0.2242 |
| 3.59 yr (1,310 days) | |
| 64.526° | |
| 0° 16m 29.28s / day | |
| Inclination | 23.858° |
| 128.98° | |
| 67.666° | |
| Physical characteristics | |
| Dimensions |
5.20±1.11 km 5.528±0.112 km 5.79 km (calculated) |
|
7.1074±0.0007 h 14.55±0.01 h |
|
| 0.23 (assumed) 0.27±0.12 0.333±0.049 |
|
| S | |
| 13.1 · 13.4 · 13.59±0.81 · 13.63 | |
6398 Timhunter, provisional designation 1991 CD1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 10 February 1991, by American astronomer couple Carolyn and Eugene Shoemaker, in collaboration with Canadian astronomer David H. Levy at Palomar Observatory in California, United States. It was named for American amateur astronomer Tim Hunter.
The stony S-type asteroid is a member of the Phocaea family, a relatively small group of asteroids with similar orbital characteristics. Timhunter orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 7 months (1,310 days). Its orbit has an eccentricity of 0.22 and an inclination of 24° with respect to the ecliptic. It was first identified as 1955 DB at Goethe Link Observatory in 1955, extending the body's observation arc by 36 years prior to its official discovery observation at Palomar.
In March 2009, a rotational lightcurve of Timhunter was obtained from photometric observations by astronomer Petr Pravec at the Ondřejov Observatory in the Czech Republic. Lightcurve analysis gave a well-defined rotation period of 14.55 hours with a brightness variation of 0.29 magnitude (U=3). One month later, another lightcurve was obtained by French amateur astronomers David Romeuf, Maurice Audejean and René Roy, which gave an alternative period solution of 7.1074 hours with an amplitude of 0.32 magnitude (U=2-).
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