13 Egeria: Difference between revisions
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Egeria [[occultation|occulted]] a [[star]] on [[January 8]], [[1992]]. The former's disc was determined to be quite circular (217×196 km). |
Egeria [[occultation|occulted]] a [[star]] on [[January 8]], [[1992]]. The former's disc was determined to be quite circular (217×196 km). |
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==References== |
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<references/> |
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{{MinorPlanets Navigator|12 Victoria|14 Irene}} |
{{MinorPlanets Navigator|12 Victoria|14 Irene}} |
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Revision as of 23:29, 15 January 2008
| Discovery | |
|---|---|
| Discovered by | Annibale de Gasparis |
| Discovery date | November 2, 1850 |
| Designations | |
| none | |
| Main belt | |
| Orbital characteristics | |
| Epoch July 14, 2004 (JD 2453200.5) | |
| Aphelion | 417.953 Gm (2.794 AU) |
| Perihelion | 352.719 Gm (2.358 AU) |
| 385.336 Gm (2.576 AU) | |
| Eccentricity | 0.085 |
| 1509.977 d (4.13 a) | |
Average orbital speed | 18.56 km/s |
| 339.787° | |
| Inclination | 16.540° |
| 43.305° | |
| 81.401° | |
| Physical characteristics | |
| Dimensions | 207.6 km (217×196 km) |
| Mass | ~9.4×1018 kg |
Mean density | 2 ? g/cm³ |
| ~0.0580 m/s² | |
| ~0.1098 km/s | |
| 0.2935 d[1] | |
| Albedo | 0.083[2] |
| Temperature | ~174 K |
Spectral type | G-type asteroid |
| 6.74 | |
13 Egeria (Template:PronEng, Template:Lang-la) is a large Main belt asteroid.
It was discovered by A. de Gasparis on November 2, 1850, and was named by Urbain J. J. Le Verrier, whose computations led to the discovery of Neptune. Egeria was a goddess (other sources say a nymph) of Aricia, in Italy, and the wife of Numa Pompilius, second king of Rome.
Egeria occulted a star on January 8, 1992. The former's disc was determined to be quite circular (217×196 km).