astro.wikisort.org - Asteroid

1510 Charlois, provisional designation 1939 DC, is a carbonaceous Eunomia asteroid from the middle region of the asteroid belt, approximately 24 kilometers in diameter.

1510 Charlois

Shape model of Charlois from its lightcurve
Discovery[1]
Discovered by	A. Patry
Discovery site	Nice Obs.
Discovery date	22 February 1939
Designations
MPC designation	(1510) Charlois
Named after	Auguste Charlois (astronomer)[2]
Alternative designations	1939 DC · 1959 WE 1963 UB
Minor planet category	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	3.0649 AU
Perihelion	2.2791 AU
Semi-major axis	2.6720 AU
Eccentricity	0.1470
Orbital period (sidereal)	4.37 yr (1,595 days)
Mean anomaly	16.619°
Mean motion	0° 13m 32.52s / day
Inclination	11.821°
Longitude of ascending node	331.49°
Argument of perihelion	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]
Synodic rotation period	5.866±0.0003 h[9] 6.653±0.008 h[10]
Geometric albedo	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]
Spectral type	SMASS = C[1] · C[3][11]
Absolute magnitude (H)	11.2[7][8] · 11.40[4] · 11.5[1][3]

It was discovered on 22 February 1939, by French astronomer André Patry at Nice Observatory in southeastern France, and later named after astronomer Auguste Charlois.[2][12]

Orbit and classification

Charlois is a carbonaceous C-type asteroid and 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 in the central main-belt 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.[1] As no precoveries were taken and no prior identifications were made, the body's observation arc begins with its discovery observation in 1939.[12]

Physical characteristics

Diameter and albedo

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,[4][5][6][7][8] 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.[3]

Rotation period

In November 2007, a rotational lightcurve, 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).[10] Another lightcurve, 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).[9]

Naming

This minor planet was named in memory of French astronomer Auguste Charlois (1864–1910), an early discoverer 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 official naming citation was published by the Minor Planet Center on 30 June 1977 (M.P.C. 4190).[13]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1510 Charlois at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1510 Charlois at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1510) Charlois

(1510) Charlois ist ein Asteroid des Hauptgürtels, der am 22. Februar 1939 von dem französischen Astronomen André Patry in Nizza entdeckt wurde.

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- [en] 1510 Charlois

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[es] (1510) Charlois

(1510) Charlois es un asteroide perteneciente al cinturón de asteroides descubierto por André Patry el 22 de febrero de 1939 desde el Observatorio de Niza, Francia.

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[ru] (1510) Шарлуа

(1510) Шарлуа (фр. Charlois) — небольшой астероид главного пояса, который открыл 22 февраля 1939 года французский астроном Андре Патри в обсерватории Ниццы и назван в честь другого французского астронома, работавшего в этой обсерватории Огюста Шарлуа[1].

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