280 Philia
Main-belt asteroid
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280 Philia is a fairly large Main belt asteroid.[2] It was discovered by Johann Palisa on 29 October 1888 at the Vienna Observatory.
Lightcurve-base 3D-model of 280 Philia. | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 29 October 1888 |
| Designations | |
| (280) Philia | |
| Pronunciation | /ËfɪliÉ/ |
Named after | Philia (nymph) |
| A888 UB | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 126.17 yr (46,083 d) |
| Aphelion | 3.26133 AU (487.888 Gm) |
| Perihelion | 2.62787 AU (393.124 Gm) |
| 2.94460 AU (440.506 Gm) | |
| Eccentricity | 0.10756 |
| 5.05 yr (1,845.6 d) | |
| 52.7987° | |
| 0° 11m 42.212s / day | |
| Inclination | 7.44582° |
| 9.91179° | |
| 90.0510° | |
| Physical characteristics | |
| Dimensions | 45.69±2.0 km |
| 70.26 h (2.928 d) | |
| 0.0444±0.004 | |
| 10.9 | |
Sparse data collected during a 1987 study indicated this asteroid has a rotation period of approximately 64 hours, which is much longer than can be continually observed from one site. During 2010â2011, an international collaboration to study the asteroid collected 9,037 photometric data points over 38 sessions. The resulting light curve analysis displays a rotation period of 70.26±0.03 h with a brightness variation of 0.15±0.02 in magnitude.[3]
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