281 Lucretia
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| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | October 31, 1888 |
| Designations | |
| Named after | Caroline Lucretia Herschel |
| Alternative names |
A906 FD; 1948 EK; 1984 JX |
| Minor planet category | Main belt (Flora family) |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 370.638 Gm (2.478 AU) |
| Perihelion | 283.953 Gm (1.898 AU) |
| Semi-major axis | 327.295 Gm (2.188 AU) |
| Eccentricity | 0.132 |
| Orbital period | 1181.985 d (3.24 a) |
| Average orbital speed | 20.14 km/s |
| Mean anomaly | 323.188° |
| Inclination | 5.308° |
| Longitude of ascending node | 31.502° |
| Argument of perihelion | 16.288° |
| Physical characteristics | |
| Dimensions | 12 km [1] |
| Mass | ~2×1015 (estimate) |
| Mean density | ~2.7 g/cm³ (estimate) [2] |
| Equatorial surface gravity | ~0.004 m/s² (estimate) |
| Escape velocity | ~0.007 km/s (estimate) |
| Rotation period | 0.181 d (4.348 h) [3] |
| Albedo | 0.199 [1] |
| Temperature |
~183 K max: 277 K (+4°C) |
| Spectral type | S [3] |
| Absolute magnitude (H) | 12.02 |
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281 Lucretia is an asteroid belonging to the Flora family in the Main Belt.
It was discovered by Johann Palisa on October 31, 1888 in Vienna. It is named for the middle name of Caroline Herschel, one of the first female astronomers.
References
- ↑ 1.0 1.1 Supplemental IRAS Minor Planet Survey
- ↑ G. A. Krasinsky et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus 158: 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- ↑ 3.0 3.1 PDS lightcurve data
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