1633 Chimay

1633 Chimay, provisional designation 1929 EC, is a Themistian asteroid from the outer region of the asteroid belt, approximately 37 kilometers in diameter.

1633 Chimay
Lightcurve based 3D-model of Chimay
Discovery [1]
Discovered byS. Arend
Discovery siteUccle Obs.
Discovery date3 March 1929
Designations
(1633) Chimay
Named after
Chimay (Belgian town)[2]
1929 EC · 1941 KF
1946 HC · 1948 RO
1951 AM · 1952 HY3
1954 SS · 1955 XN
1972 VM1 · A917 BB
main-belt · Themis [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc100.02 yr (36,531 days)
Aphelion3.5907 AU
Perihelion2.7980 AU
3.1943 AU
Eccentricity0.1241
5.71 yr (2,085 days)
237.33°
0° 10m 21.36s / day
Inclination2.6759°
114.08°
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]
6.58±0.01 h[8]
6.59064±0.00005 h[9]
6.5911±0.0001 h[10]
6.6367±0.0038 h[11]
0.0781 (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]
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]

    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 (U=3/3-/2).[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]

    gollark: I was on a somewhat tight budget, so it's two partial-cube-edgey-bits and assorted wiring off to the side.
    gollark: Well, two, but your other end is going to be on the ME core where it's nice and cheap to run dense cables or whatever.
    gollark: You have a ME P2P tunnel on one end, and another on the other end, and bind them together, and then you can run 32 channels over that one channel the P2P tunnel takes.
    gollark: All 32 channels are supplied by a single channel of P2P-backbone network on my main base cable.
    gollark: Crystal growth, weird stuff I forgot to move, inscribers, chargers, AA laser, fluid transposer.

    References
    1. "JPL Small-Body Database Browser: 1633 Chimay (1929 EC)" (2017-01-28 last obs.). Jet Propulsion Laboratory. Retrieved 30 June 2017.
    2. 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. "LCDB Data for (1633) Chimay". Asteroid Lightcurve Database (LCDB). Retrieved 1 May 2016.
    4. 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.
    5. 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)
    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 8 December 2016.
    7. 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 1 May 2016.
    8. Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (June 2014). "313 New Asteroid Rotation Periods from Palomar Transient Factory Observations". The Astrophysical Journal. 788 (1): 21. arXiv:1405.1144. Bibcode:2014ApJ...788...17C. doi:10.1088/0004-637X/788/1/17. Retrieved 7 January 2016.
    9. 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. arXiv:1309.4296. Bibcode:2013A&A...559A.134H. doi:10.1051/0004-6361/201321993. Retrieved 7 January 2016.
    10. Behrend, Raoul. "Asteroids and comets rotation curves – (1633) Chimay". Geneva Observatory. Retrieved 1 May 2016.
    11. 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. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. 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. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 1 May 2016.
    13. "1633 Chimay (1929 EC)". Minor Planet Center. 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. Bibcode:2008MPBu...35..179B. ISSN 1052-8091. 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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