1510 Charlois
| Discovery | |
|---|---|
| Discovered by | A. Patry |
| Discovery site | Nice Obs. |
| Discovery date | 22 February 1939 |
| Designations | |
| MPC designation | 1510 Charlois |
|
Named after
|
Auguste Charlois (astronomer) |
| 1939 DC · 1959 WE 1963 UB |
|
| main-belt · Eunomia | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 77.72 yr (28,386 days) |
| Aphelion | 3.0648 AU |
| Perihelion | 2.2792 AU |
| 2.6720 AU | |
| Eccentricity | 0.1470 |
| 4.37 yr (1,595 days) | |
| 331.51° | |
| 0° 13m 32.52s / day | |
| Inclination | 11.821° |
| 331.49° | |
| 165.21° | |
| Physical characteristics | |
| Dimensions |
20.30±0.39 km 23.68 km (derived) 23.80±2.8 km (IRAS:11) 24.507±0.345 26.98±0.64 km 27.608±0.373 km |
|
5.866±0.0003 h 6.653±0.008 h |
|
|
0.0769±0.0086 0.0791 (derived) 0.081±0.004 0.1033±0.029 (IRAS:11) 0.118±0.017 |
|
| SMASS = C · C | |
| 11.2 · 11.40 · 11.5 | |
1510 Charlois, provisional designation 1939 DC, is a carbonaceous Eunomia asteroid from the middle region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 22 February 1939, by French astronomer André Patry at Nice Observatory in southeastern France.
Charlois is a member of the Eunomia family, a large group of otherwise mostly S-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.3–3.1 AU once every 4 years and 4 months (1,595 days). Its orbit has an eccentricity of 0.15 and an inclination of 12° with respect to the ecliptic. As no precoveries were taken and no prior identifications were made, the body's observation arc begins with its discovery observation in 1939.
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Charlois measures between 20.3 and 27.6 kilometers in diameter, and its surface has an albedo between 0.077 and 0.12, while the Collaborative Asteroid Lightcurve Link derives an albedo of 0.079 and a diameter of 23.7 kilometers based on an absolute magnitude of 11.5.
In November 2007, a rotational light-curve, constructed from photometric observations by Crag Bennefeld at the Rick Observatory, gave a rotation period of 6.653±0.008 hours with a brightness variation of 0.23 in magnitude (U=2). Another light-curve, obtained by French astronomers Pierre Antonini and René Roy in February 2013, gave a period of 5.866±0.0003 hours with an amplitude of 0.18 (U=2).
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