281 Lucretia
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| Discovery A | |
|---|---|
| Discoverer | Johann Palisa |
| Discovery date | October 31, 1888 |
| Alternate designations B |
A906 FD; 1948 EK; 1984 JX |
| Category | Main belt (Flora family) |
| Orbital elements C | |
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| Eccentricity (e) | 0.132 |
| Semi-major axis (a) | 327.295 Gm (2.188 AU) |
| Perihelion (q) | 283.953 Gm (1.898 AU) |
| Aphelion (Q) | 370.638 Gm (2.478 AU) |
| Orbital period (P) | 1181.985 d (3.24 a) |
| Mean orbital speed | 20.14 km/s |
| Inclination (i) | 5.308° |
| Longitude of the ascending node (Ω) |
31.502° |
| Argument of perihelion (ω) |
16.288° |
| Mean anomaly (M) | 323.188° |
| Physical characteristics D | |
| Dimensions | 12 km [1] |
| Mass | ~2×1015 (estimate) |
| Density | ~2.7 g/cm³ (estimate) [2] |
| Surface gravity | ~0.004 m/s² (estimate) |
| Escape velocity | ~0.007 km/s (estimate) |
| Rotation period | 0.181 d (4.348 h) [3] |
| Spectral class | S [3] |
| Absolute magnitude | 12.02 |
| Albedo (geometric) | 0.199 [1] |
| Mean surface temperature |
~183 K max: 277 K (+4°C) |
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.
[edit] References
- ^ a b Supplemental IRAS Minor Planet Survey
- ^ G. A. Krasinsky et al (2002). "Hidden Mass in the Asteroid Belt". Icarus 158: 98. doi:.
- ^ a b PDS lightcurve data
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