146 Lucina
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A three-dimensional model of 146 Lucina based on its light curve.
|
|
| Discovery | |
|---|---|
| Discovered by | Alphonse Borrelly |
| Discovery date | 8 June 1875 |
| Designations | |
| Main belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.35 yr (47610 d) |
| Aphelion | 2.89945 AU (433.752 Gm) |
| Perihelion | 2.53641 AU (379.442 Gm) |
| 2.71793 AU (406.597 Gm) | |
| Eccentricity | 0.066786 |
| 4.48 yr (1636.6 d) | |
|
Average orbital speed
|
18.04 km/s |
| 198.102° | |
| 0° 13m 11.863s / day | |
| Inclination | 13.0947° |
| 83.9692° | |
| 146.982° | |
| Earth MOID | 1.53233 AU (229.233 Gm) |
| Jupiter MOID | 2.14062 AU (320.232 Gm) |
| Jupiter Tisserand parameter | 3.319 |
| Physical characteristics | |
| Dimensions |
132.21±2.4 km 131.893 km |
| Mass | 2.4×1018 kg |
|
Mean density
|
2.0 g/cm³ |
|
Equatorial surface gravity
|
0.0369 m/s² |
|
Equatorial escape velocity
|
0.0699 km/s |
| 18.557 h (0.7732 d) | |
|
0.0531±0.002 0.0496 ± 0.0107 |
|
| Temperature | ~169 K |
| C (Tholen) | |
| 8.20, 8.277 | |
146 Lucina is a main-belt asteroid that was discovered by Alphonse Borrelly on June 8, 1875, and named after Lucina, the Roman goddess of childbirth. It is large, dark and has a carbonaceous composition.
Photometric observations of this asteroid made during 1979 and 1981 gave a light curve with a period of 18.54 hours.
Two stellar occultations by Lucina have been observed so far, in 1982 and 1989. During the first event, a possible small satellite with an estimated 5.7 km diameter was detected at a distance of 1,600 km from 146 Lucina. A 1992 search using a CCD failed to discover a satellite larger than 0.6 km, although it may have been obscured by occultation mask. Further evidence for a satellite emerged in 2003, this time based on astrometric measurements.
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