281 Lucretia
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A three-dimensional model of 281 Lucretia based on its light curve.
|
|
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 31 October 1888 |
| Designations | |
|
Named after
|
Caroline Lucretia Herschel |
| A906 FD; 1948 EK; 1984 JX |
|
| Main belt (Flora family) | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 126.00 yr (46020 d) |
| Aphelion | 2.47750 AU (370.629 Gm) |
| Perihelion | 1.89821 AU (283.968 Gm) |
| 2.18786 AU (327.299 Gm) | |
| Eccentricity | 0.13239 |
| 3.24 yr (1182.0 d) | |
|
Average orbital speed
|
20.14 km/s |
| 161.880° | |
| 0° 18m 16.423s / day | |
| Inclination | 5.30407° |
| 31.4134° | |
| 16.7540° | |
| Earth MOID | 0.906973 AU (135.6812 Gm) |
| Jupiter MOID | 2.88103 AU (430.996 Gm) |
| Jupiter Tisserand parameter | 3.658 |
| Physical characteristics | |
| Dimensions |
11.76±0.9 km 12 km |
| Mass | ~2×1015(estimate) |
|
Mean density
|
~2.7 g/cm³ (estimate) |
|
Equatorial surface gravity
|
~0.004 m/s² (estimate) |
|
Equatorial escape velocity
|
~0.007 km/s (estimate) |
| 0.181 d (4.348 h) | |
|
0.1987±0.035 0.199 |
|
| Temperature | ~183 K max: 277 K (+4°C) |
| S | |
| 12.02 | |
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.
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