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1633 Chimay
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Themistian asteroid
October 2019
yes
1633 Chimay
#D6D6D6
1633Chimay (Lightcurve Inversion).png
Lightcurve based 3D-model of Chimay padding: 5px 0; line-height:1.3em;
3 March 1929
S. Arend
Uccle Obs.
(1633) Chimay
1929 EC1941 KF1946 HC1948 RO1951 AM1952 HY 31954 SS1955 XN1972 VM 1A917 BB
Chimay (Belgian town)
main-beltThemis
4 September 2017 (JD 2458000.5)
0
100.02 yr (36,531 days)
3.5907 AU
2.7980 AU
3.1943 AU
0.1241
5.71 yr (2,085 days)
237.33°
0.1726 ms / day
2.6759°
114.08°
65.539°
36.07 km (derived)36.12 3.1 km (IRAS:3)36.26 0.86 km37.428 0.46637.732 0.426 km
6.58 0.01 h6.59064 0.00005 h6.5911 0.0001 h6.6367 0.0038 h
0.0781 (derived)0.0785 0.01350.080 0.0140.0854 0.017 (IRAS:3)0.088 0.005
S
10.36 0.17 (R)10.481 0.002 (R)10.510.610.97 0.06
1633 Chimay, provisional designation 1929 EC, is a Themistian asteroid from the outer region of the asteroid belt, approximately 37 kilometers in diameter.
It was discovered on 3 March 1929, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle. Five nights later, the body was independently discovered by Max Wolf at Heidelberg Observatory in southern Germany. It was later named for the Belgian town of Chimay.
Classification and orbit
Chimay is a member of the Themis family, a dynamical family of asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,085 days). Its orbit has an eccentricity of 0.12 and an inclination of 3° with respect to the ecliptic. Chimay was first identified as A917 BB at Heidelberg in 1917, extending the body's observation arc by 12 years prior to its official discovery observation.
Physical characteristics
Several rotational lightcurves were obtained from photometric observations. Lightcurve analysis gave a well-defined, concurring rotation period of 6.58–6.63 hours with a brightness variation between 0.31 and 0.58 magnitude (U=3/3-/2).
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Chimay measures between 36.1 and 37.7 kilometers in diameter, and its surface has a low albedo between 0.079 and 0.089. In accordance with the space-based surveys, the Collaborative Asteroid Lightcurve Link (CALL) derives an albedo of 0.078, and calculates a diameter of 36.1 kilometers. CALL also classifies Chimay as a S-type rather than a carbonaceous C-type asteroid.
Naming
This minor planet was named after the Belgian town Chimay, home of the discoverer, who also co-discovered Comet Arend–Roland. The official 1633 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3931).
References
2017-01-28 last obs.
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https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001633
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Schmadel Lutz D.
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1633 Chimay (1929 EC)
Minor Planet Center
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1 May 2016
Asteroids and comets rotation curves – (1633) Chimay
Behrend
Raoul
Geneva Observatory
http://obswww.unige.ch/~behrend/page4cou.html#001633
1 May 2016
1 April 2019
https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001633
dead
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IRAS Minor Planet Survey V6.0
https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab
NASA Planetary Data System
12
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External links
Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 )
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR https://web.archive.org/web/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
1633
1632 Sieböhme 1633 1634 Ndola
001633
Category:Discoveries by Sylvain Arend
Category:Named minor planets
19290303