331 Etheridgea
Main-belt asteroid
From Wikipedia, the free encyclopedia
331 Etheridgea is a large main belt asteroid.[1] It was discovered by Auguste Charlois on 1 April 1892 in Nice. The meaning of the name is unknown.[2] This asteroid is orbiting the Sun at a distance of 3.02 AU with a period of 5.26 years and an eccentricity (ovalness) of 0.10. The orbital plane is tilted at an angle of 6.05° to the plane of the ecliptic.[1]
Lightcurve-base 3D-model of 331 Etheridgea. | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 1 April 1892 |
| Designations | |
| (331) Etheridgea | |
| Pronunciation | /ˌɛθəˈrɪdʒiə/ |
Named after | Possibly Robert Etheridge |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.95 yr (45,274 d) |
| Aphelion | 3.32623 AU (497.597 Gm) |
| Perihelion | 2.72055 AU (406.988 Gm) |
| 3.02339 AU (452.293 Gm) | |
| Eccentricity | 0.10016 |
| 5.26 yr (1,920.2 d) | |
| 88.5392° | |
| 0° 11m 14.939s / day | |
| Inclination | 6.05385° |
| 22.0346° | |
| 333.055° | |
| Physical characteristics | |
| Dimensions | 74.92±2.7 km |
| 25.315 h (1.0548 d) | |
| 0.0447±0.003 | |
| 9.62 | |
Analysis of the asteroid light curve generated from photometric data collected in 2015 provided a rotation period of 25.315±0.001 h. This result is completely different from the previous rotation period estimates.[3] It is a low albedo, carbonaceous C-type asteroid and spans a girth of 74.9±2.7 km.[4]
It may have been named for the geologist and paleontologist Robert Etheridge (1819–1903).[5][6]
_mathilde.jpg){kind=small}