146 Lucina
Main-belt asteroid From Wikipedia, the free encyclopedia
Main-belt asteroid From Wikipedia, the free encyclopedia
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. The spectra of the asteroid displays evidence of aqueous alteration.[7]
![]() A three-dimensional model of 146 Lucina based on its light curve. | |
Discovery[1] | |
---|---|
Discovered by | Alphonse Borrelly |
Discovery date | 8 June 1875 |
Designations | |
(146) Lucina | |
Pronunciation | /luːˈsaɪnə/[2] or as Latin Lūcīna[3] |
A875 LC; 1950 CY | |
Main belt | |
Orbital characteristics[4][5] | |
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) |
TJupiter | 3.319 |
Physical characteristics | |
Dimensions | 132.21±2.4 km[5] 131.893 km[6] |
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[5] 0.0496 ± 0.0107[6] | |
Temperature | ~169 K |
C[6] (Tholen) | |
8.20,[5] 8.277[6] | |
Photometric observations of this asteroid made during 1979 and 1981 gave a light curve with a period of 18.54 hours.[8]
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.[9] 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.[10] Further evidence for a satellite emerged in 2003, this time based on astrometric measurements.[11]