1510 Charlois

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 byA. Patry
Discovery siteNice Obs.
Discovery date22 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 arc78.10 yr (28,525 days)
Aphelion3.0649 AU
Perihelion2.2791 AU
2.6720 AU
Eccentricity0.1470
4.37 yr (1,595 days)
16.619°
0° 13m 32.52s / day
Inclination11.821°
331.49°
165.25°
Physical characteristics
Dimensions20.30±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±0.0003 h[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]

    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]

    gollark: Not practically.
    gollark: Well, its autohaxor™ hasn't been programmed to target wireless devices yet.
    gollark: * safe
    gollark: None are sage.
    gollark: The modems I mean.

    References
    1. "JPL Small-Body Database Browser: 1510 Charlois (1939 DC)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 30 June 2017.
    2. Schmadel, Lutz D. (2007). "(1510) Charlois". Dictionary of Minor Planet Names – (1510) Charlois. Springer Berlin Heidelberg. p. 120. doi:10.1007/978-3-540-29925-7_1511. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1510) Charlois". Asteroid Lightcurve Database (LCDB). Retrieved 7 August 2016.
    4. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 7 August 2016.
    5. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    6. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 9 December 2016.
    7. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    8. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 7 August 2016.
    9. Behrend, Raoul. "Asteroids and comets rotation curves – (1510) Charlois". Geneva Observatory. Retrieved 7 August 2016.
    10. Bennefeld, Craig; Cantu, Jenel; Vashti, Holly; Latoya, Jordon; Tierra, Martin; Soar, Elysabeth; et al. (April 2009). "Asteroid Lightcurve Analysis at Ricky Observatory". The Minor Planet Bulletin. 36 (2): 45–48. Bibcode:2009MPBu...36...45B. Retrieved 7 August 2016.
    11. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 7 August 2016.
    12. "1510 Charlois (1939 DC)". Minor Planet Center. Retrieved 7 August 2016.
    13. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

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