4001 Ptolemaeus
 Orbit of 4001 Ptolemaeus
|
|
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | 2 August 1949 |
| Designations | |
| MPC designation | 4001 |
|
Named after
|
Ptolemy |
| 1949 PV, 1949 QD1, 1982 BU9, 1987 OE | |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24302 days (66.54 yr) |
| Aphelion | 2.6824383 AU (401.28706 Gm) |
| Perihelion | 1.8908792 AU (282.87150 Gm) |
| 2.2866587 AU (342.07927 Gm) | |
| Eccentricity | 0.1730820 |
| 3.46 yr (1263.0 d) | |
| 66.637857° | |
| 0° 17m 6.135s / day | |
| Inclination | 5.459206° |
| 130.72492° | |
| 203.98891° | |
| Earth MOID | 0.880129 AU (131.6654 Gm) |
| Jupiter MOID | 2.66598 AU (398.825 Gm) |
| Jupiter Tisserand parameter | 3.575 |
| Proper orbital elements | |
|
Proper mean motion
|
0.2851 deg / yr |
|
Proper orbital period
|
1262.71484 yr (461206.594 d) |
| Physical characteristics | |
| S | |
| 13.7 | |
4001 Ptolemaeus (1949 PV) is a main-belt asteroid discovered on August 2, 1949 by K. Reinmuth at Heidelberg.
On April 24, 1989, Ptolemaeus made a close approach to the asteroid 6 Hebe. It came within 5,531,478 km of Hebe at a relative velocity of 3.6662 km/s.
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