217 Eudora
Eudora (minor planet designation: 217 Eudora) is a large Main belt asteroid. It was discovered by French (Corsican) astronomer J. Coggia on August 30, 1880, in Marseilles, France. It was his fourth asteroid discovery and is named after Eudora, a Hyad in Greek mythology.
3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | J. Coggia |
| Discovery date | 30 August 1880 |
| Designations | |
MPC designation | (217) Eudora |
| Pronunciation | /juːˈdɔːrə/ |
Named after | Eudora |
Alternative designations | A880 QA, 1914 RA |
Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.48 yr (47657 d) |
| Aphelion | 3.75541 AU (561.801 Gm) |
| Perihelion | 1.98080 AU (296.323 Gm) |
Semi-major axis | 2.86811 AU (429.063 Gm) |
| Eccentricity | 0.30937 |
Orbital period (sidereal) | 4.86 yr (1774.2 d) |
Average orbital speed | 17.57 km/s |
Mean anomaly | 349.290° |
Mean motion | 0° 12m 10.49s / day |
| Inclination | 10.5165° |
Longitude of ascending node | 162.594° |
| 155.320° | |
| Physical characteristics | |
| Dimensions | 66.24±2.3 km 68.62 ± 1.41 km |
| Mass | (1.52 ± 0.06) × 1018 kg |
Mean density | 8.98 ± 0.65 g/cm3 |
Synodic rotation period | 25.272 h (1.0530 d) 25.253 ± 0.003 hr |
| 0.0484±0.004 | |
| C | |
| 9.80 | |
It probably has a composition similar to carbonaceous chondrites. In 2007, a study showed it rotates every 25.253 ± 0.003 hours, based on lightcurve data. A light curve generated from photometric observations at Pulkovo Observatory, give a matching rotation period of 25.253 ± 0.002 hours and a brightness variation of 0.22 ± 0.04 in magnitude.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.