_Charlois.png) Shape model of Charlois from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | A. Patry |
| Discovery site | Nice Obs. |
| Discovery date | 22 February 1939 |
| Designations | |
| (1510) Charlois | |
Named after | Auguste Charlois(astronomer)[2] |
| 1939 DC · 1959 WE 1963 UB | |
| main-belt · Eunomia[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.10 yr (28,525 days) |
| Aphelion | 3.0649AU |
| Perihelion | 2.2791 AU |
| 2.6720 AU | |
| Eccentricity | 0.1470 |
| 4.37yr (1,595 days) | |
| 16.619° | |
| 0° 13m 32.52s / day | |
| Inclination | 11.821° |
| 331.49° | |
| 165.25° | |
| Physical characteristics | |
| Dimensions | 20.30±0.39 km[4] 23.68 km(derived)[3] 23.80±2.8 km(IRAS:11)[5] 24.507±0.345[6] 26.98±0.64 km[7] 27.608±0.373 km[8] |
| 5.866±0.0003h[9] 6.653±0.008 h[10] | |
| 0.0769±0.0086[8] 0.0791(derived)[3] 0.081±0.004[7] 0.1033±0.029(IRAS:11)[5] 0.118±0.017[4][6] | |
| SMASS =C[1] · C[3][11] | |
| 11.2[7][8] · 11.40[4] · 11.5[1][3] | |
1510 Charlois (provisional designation1939 DC) is a carbonaceous Eunomiaasteroid from the middle region of theasteroid belt, approximately 24 kilometers in diameter.
It was discovered on 22 February 1939, by French astronomerAndré Patry atNice Observatory in southeastern France, and later named after astronomerAuguste Charlois.[2][12]
Charlois is a carbonaceousC-type asteroid and a member of theEunomia family, a large group of otherwise mostlyS-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun in thecentral main-belt at a distance of 2.3–3.1 AU once every 4 years and 4 months (1,595 days). Its orbit has aneccentricity of 0.15 and aninclination of 12° with respect to theecliptic.[1]As noprecoveries were taken and no prior identifications were made, the body'sobservation arc begins with its discovery observation in 1939.[12]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, Charlois measures between 20.3 and 27.6 kilometers in diameter, and its surface has analbedo between 0.077 and 0.12,[4][5][6][7][8] while theCollaborative Asteroid Lightcurve Link derives an albedo of 0.079 and a diameter of 23.7 kilometers based on anabsolute magnitude of 11.5.[3]
In November 2007, a rotationallightcurve, constructed from photometric observations by Crag Bennefeld at the Rick Observatory, gave arotation period of6.653±0.008 hours with a brightness variation of 0.23 inmagnitude (U=2).[10] Another lightcurve, obtained by French astronomersPierre Antonini andRené Roy in February 2013, gave a period of5.866±0.0003 hours with an amplitude of 0.18 (U=2).[9]
Thisminor planet was named in memory of French astronomerAuguste Charlois (1864–1910), an earlydiscoverer of minor planets at the Nice Observatory where this asteroid was discovered. He was a pioneer during the transition from visual to photographic discoveries in the late 19th century. Until his homicide in 1910, he had discovered 99 asteroids.[2] The officialnaming citation was published by theMinor Planet Center on 30 June 1977 (M.P.C. 4190).[13]
