8405 Asbolus
| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak Obs. |
| Discovery date | 5 April 1995 |
| Designations | |
| MPC designation | 8405 Asbolus |
| Pronunciation | (/ˈæzbələs/ |
|
Named after
|
Asbolus (Greek mythology) |
| 1995 GO | |
| centaur | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 16.60 yr (6,063 days) |
| Aphelion | 29.115 AU |
| Perihelion | 6.8238 AU |
| 17.969 AU | |
| Eccentricity | 0.6203 |
| 76.17 yr (27,823 days) | |
| 68.836° | |
| 0° 0m 46.44s / day | |
| Inclination | 17.640° |
| 6.1502° | |
| 290.07° | |
| Physical characteristics | |
| Dimensions |
66±8 km 76 km 77.5±7.5 km 80.83 km (derived) 84±8 km 85±9 km |
|
4.4682±0.0003 h 8 h 8.870 h 8.932±0.002 h 8.9351 h |
|
|
0.04 0.05 0.056±0.019 0.057 (assumed) 0.095±0.015 0.12±0.03 0.13±0.03 |
|
| BR · C | |
| 8.74 · 9.1 · 9.11±0.02 · 9.13±0.25 · 9.18 · 9.19 · 9.257±0.120 (R) · 9.26 | |
8405 Asbolus (/ˈæzbələs/; from Greek: Άσβολος), provisionally designated 1995 GO, is a centaur orbiting in the Outer Solar System between the orbits of Jupiter and Neptune. It was discovered on 5 April 1995, by James Scotti and Robert Jedicke of Spacewatch (credited) at Kitt Peak Observatory in Arizona, United States. It is named after Asbolus, a centaur in Greek mythology and measures approximately 80 kilometers in diameter.
Centaurs have short dynamical lifetimes due to perturbations by the giant planets. Asbolus is estimated to have an orbital half-life of about 860 kiloannum. Asbolus is currently classified as a SN centaur since Saturn is considered to control the perihelion and Neptune controls the aphelion. It currently has a perihelion of 6.8 AU, so is also influenced by Jupiter. Centaurs with a perihelion less than 6.6 AU are very strongly influenced by Jupiter and for classification purposes are considered to have a perihelion under the control of Jupiter. In about ten thousand years, clones of the orbit of Asbolus suggest that its perihelion classification may come under the control of Jupiter.
Predicting the overall orbit and position of Asbolus beyond a few thousand years is difficult because of errors in the known trajectory, error amplification by perturbations due to all of the gas giants, and the possibility of perturbation as a result of cometary outgassing and fragmentation. Compared to centaur 7066 Nessus, the orbit of Asbolus is currently much more chaotic.
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