Astronomy:1633 Chimay

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1633 Chimay
1633Chimay (Lightcurve Inversion).png
Lightcurve based 3D-model of Chimay
Discovery[1]
Discovered byS. Arend
Discovery siteUccle Obs.
Discovery date3 March 1929
Designations
(1633) Chimay
Named afterChimay (Belgian town)[2]
1929 EC · 1941 KF
1946 HC · 1948 RO
1951 AM · 1952 HY3
1954 SS · 1955 XN
1972 VM1 · A917 BB
Minor planet categorymain-belt · Themis[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc100.02 yr (36,531 days)
|{{{apsis}}}|helion}}3.5907 AU
|{{{apsis}}}|helion}}2.7980 AU
3.1943 AU
Eccentricity0.1241
Orbital period5.71 yr (2,085 days)
Mean anomaly237.33°
Mean motion0° 10m 21.36s / day
Inclination2.6759°
Longitude of ascending node114.08°
65.539°
Physical characteristics
Dimensions36.07 km (derived)[3]
36.12±3.1 km (IRAS:3)[4]
36.26±0.86 km[5]
37.428±0.466[6]
37.732±0.426 km[7]
Rotation period6.58±0.01 h[8]
6.59064±0.00005 h[9]
6.5911±0.0001 h[10]
6.6367±0.0038 h[11]
Geometric albedo0.0781 (derived)[3]
0.0785±0.0135[7]
0.080±0.014[6]
0.0854±0.017 (IRAS:3)[4]
0.088±0.005[5]
S[3]
Absolute magnitude (H)10.36±0.17 (R)[8] · 10.481±0.002 (R)[11] · 10.5[5][7] · 10.6[1][3] · 10.97±0.06[12]


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.[13] Five nights later, the body was independently discovered by Max Wolf at Heidelberg Observatory in southern Germany.[2] It was later named for the Belgian town of Chimay.[2]

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.[1] 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.[13]

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 ({{{1}}}).[8][9][10][11][14]

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

Naming

This minor planet was named after the Belgian town Chimay, home of the discoverer, who also co-discovered Comet Arend–Roland.[2] The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3931).[15]

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1633 Chimay (1929 EC)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001633. Retrieved 30 June 2017. 
  2. ↑ 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(1633) Chimay". Dictionary of Minor Planet Names – (1633) Chimay. Springer Berlin Heidelberg. p. 130. doi:10.1007/978-3-540-29925-7_1634. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (1633) Chimay". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1633%7CChimay. Retrieved 1 May 2016. 
  4. ↑ 4.0 4.1 4.2 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019. 
  5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  6. ↑ 6.0 6.1 6.2 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 8 December 2016. 
  7. ↑ 7.0 7.1 7.2 7.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M. Retrieved 1 May 2016. 
  8. ↑ 8.0 8.1 8.2 Chang, Chan-Kao (June 2014). "313 New Asteroid Rotation Periods from Palomar Transient Factory Observations". The Astrophysical Journal 788 (1): 21. doi:10.1088/0004-637X/788/1/17. Bibcode: 2014ApJ...788...17C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...788...17C. Retrieved 7 January 2016. 
  9. ↑ 9.0 9.1 Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R. et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy and Astrophysics 559: 19. doi:10.1051/0004-6361/201321993. Bibcode: 2013A&A...559A.134H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...559A.134H. Retrieved 7 January 2016. 
  10. ↑ 10.0 10.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1633) Chimay". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001633. Retrieved 1 May 2016. 
  11. ↑ 11.0 11.1 11.2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 1 May 2016. 
  12. ↑ 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 1 May 2016. 
  13. ↑ 13.0 13.1 "1633 Chimay (1929 EC)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1633. Retrieved 1 May 2016. 
  14. ↑ Brinsfield, James W. (October 2008). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 2nd Quarter 2008". The Minor Planet Bulletin 35 (4): 179–181. ISSN 1052-8091. Bibcode: 2008MPBu...35..179B. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..179B. Retrieved 7 January 2016. 
  15. ↑ Schmadel, Lutz D.. "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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