1633 Chimay
Themistian asteroid
title: "1633 Chimay" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["themis-asteroids", "discoveries-by-sylvain-arend", "named-minor-planets", "astronomical-objects-discovered-in-1929"] description: "Themistian asteroid" topic_path: "general/themis-asteroids" source: "https://en.wikipedia.org/wiki/1633_Chimay" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Themistian asteroid ::
::data[format=table title="Infobox planet"]
| Field | Value |
|---|---|
| minorplanet | yes |
| name | 1633 Chimay |
| background | #D6D6D6 |
| image | 1633Chimay (Lightcurve Inversion).png |
| caption | |
| discovery_ref | |
| discovered | 3 March 1929 |
| discoverer | S. Arend |
| discovery_site | Uccle Obs. |
| mpc_name | (1633) Chimay |
| alt_names | 1929 EC1941 KF |
| 1946 HC1948 RO | |
| 1951 AM | |
| 1954 SS1955 XN | |
| A917 BB | |
| named_after | Chimay (Belgian town) |
| mp_category | main-beltThemis |
| orbit_ref | |
| epoch | 4 September 2017 (JD 2458000.5) |
| uncertainty | 0 |
| observation_arc | 100.02 yr (36,531 days) |
| aphelion | 3.5907 AU |
| perihelion | 2.7980 AU |
| semimajor | 3.1943 AU |
| eccentricity | 0.1241 |
| period | 5.71 yr (2,085 days) |
| mean_anomaly | 237.33° |
| mean_motion | / day |
| inclination | 2.6759° |
| asc_node | 114.08° |
| arg_peri | 65.539° |
| dimensions | 36.07 km (derived) |
| km (IRAS:3) | |
| km |
km | | rotation | h h h h | | albedo | 0.0781 (derived)
(IRAS:3) | | spectral_type | S | | abs_magnitude | (R) (R)10.510.6 | ::
| minorplanet = yes | name = 1633 Chimay | background = #D6D6D6 | image = 1633Chimay (Lightcurve Inversion).png | image_scale = | caption = | discovery_ref = | discovered = 3 March 1929 | discoverer = S. Arend | discovery_site = Uccle Obs. | mpc_name = (1633) Chimay | alt_names = 1929 EC1941 KF 1946 HC1948 RO 1951 AM 1954 SS1955 XN A917 BB | named_after = Chimay (Belgian town) | mp_category = main-beltThemis | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 100.02 yr (36,531 days) | aphelion = 3.5907 AU | perihelion = 2.7980 AU | semimajor = 3.1943 AU | eccentricity = 0.1241 | period = 5.71 yr (2,085 days) | mean_anomaly = 237.33° | mean_motion = / day | inclination = 2.6759° | asc_node = 114.08° | arg_peri = 65.539° | dimensions = 36.07 km (derived) km (IRAS:3) km
km | rotation = h h h h | albedo = 0.0781 (derived)
(IRAS:3)
| spectral_type = S | abs_magnitude = (R) (R)10.510.6
1633 Chimay, provisional designation , 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 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 ().
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 was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3931).
References
|type = 2017-01-28 last obs. |title = JPL Small-Body Database Browser: 1633 Chimay (1929 EC) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001633 |publisher = Jet Propulsion Laboratory |accessdate = 30 June 2017}}
|title = Dictionary of Minor Planet Names – (1633) Chimay |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 130 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1634 |chapter = (1633) Chimay }}
|title = 1633 Chimay (1929 EC) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1633 |accessdate = 1 May 2016}}
|title = Asteroids and comets rotation curves – (1633) Chimay |last = Behrend |first=Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page4cou.html#001633 |accessdate = 1 May 2016}}
|title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) |chapter = Appendix – Publication Dates of the MPCs |last = Schmadel |first=Lutz D. |publisher = Springer Berlin Heidelberg |page = 221 |isbn = 978-3-642-01964-7 |doi = 10.1007/978-3-642-01965-4}}
|first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. D. |last4 = Price |date = October 2004 |title = IRAS Minor Planet Survey V6.0 |url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System |volume = 12 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 22 October 2019}}
|title = LCDB Data for (1633) Chimay |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1633%7CChimay |accessdate = 1 May 2016}}
|display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |doi-access= free
|display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 |access-date= 1 May 2016}}
|author = Brinsfield, James W. |date = October 2008 |title = Asteroid Lightcurve Analysis at the Via Capote Observatory: 2nd Quarter 2008 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..179B |journal = The Minor Planet Bulletin |volume = 35 |issue = 4 |pages = 179–181 |issn = 1052-8091 |bibcode = 2008MPBu...35..179B |access-date= 7 January 2016}}
|display-authors = 6 |first1 = J. |last1 = Hanus |first2 = M. |last2 = Broz |first3 = J. |last3 = Durech |first4 = B. D. |last4 = Warner |first5 = J. |last5 = Brinsfield |first6 = R. |last6 = Durkee |first7 = D. |last7 = Higgins |first8 = R. A. |last8 = Koff |first9 = J. |last9 = Oey |first10 = F. |last10 = Pilcher |first11 = R. |last11 = Stephens |first12 = L. P. |last12 = Strabla |first13 = Q. |last13 = Ulisse |first14 = R. |last14 = Girelli |date = November 2013 |title = An anisotropic distribution of spin vectors in asteroid families |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...559A.134H |journal = Astronomy and Astrophysics |volume = 559 |page = 19 |bibcode = 2013A&A...559A.134H |doi = 10.1051/0004-6361/201321993 |arxiv = 1309.4296 |access-date= 7 January 2016}}
|display-authors = 6 |first1 = Chan-Kao |last1 = Chang |first2 = Wing-Huen |last2 = Ip |author2-link = Ip Wing-huen |first3 = Hsing-Wen |last3 = Lin |first4 = Yu-Chi |last4 = Cheng |first5 = Chow-Choong |last5 = Ngeow |first6 = Ting-Chang |last6 = Yang |first7 = Adam |last7 = Waszczak |first8 = Shrinivas R. |last8 = Kulkarni |first9 = David |last9 = Levitan |first10 = Branimir |last10 = Sesar |first11 = Russ |last11 = Laher |first12 = Jason |last12 = Surace |first13 = Thomas. A. |last13 = Prince |date = June 2014 |title = 313 New Asteroid Rotation Periods from Palomar Transient Factory Observations |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...788...17C |journal = The Astrophysical Journal |volume = 788 |issue = 1 |page = 21 |bibcode = 2014ApJ...788...17C |doi = 10.1088/0004-637X/788/1/17 |arxiv = 1405.1144 |access-date= 7 January 2016}}
|display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 1 May 2016}}
|display-authors = 6 |first1 = Peter |last1 = Veres |first2 = Robert |last2 = Jedicke |first3 = Alan |last3 = Fitzsimmons |first4 = Larry |last4 = Denneau |first5 = Mikael |last5 = Granvik |first6 = Bryce |last6 = Bolin |first7 = Serge |last7 = Chastel |first8 = Richard J. |last8 = Wainscoat |first9 = William S. |last9 = Burgett |first10 = Kenneth C. |last10 = Chambers |first11 = Heather |last11 = Flewelling |first12 = Nick |last12 = Kaiser |first13 = Eugen A. |last13 = Magnier |first14 = Jeff S. |last14 = Morgan |first15 = Paul A. |last15 = Price |first16 = John L. |last16 = Tonry |first17 = Christopher |last17 = Waters |date = November 2015 |title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 1 May 2016}}
|display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = T. |last2 = Grav |first3 = A. K. |last3 = Mainzer |first4 = C. R. |last4 = Nugent |first5 = J. M. |last5 = Bauer |first6 = R. |last6 = Stevenson |first7 = S. |last7 = Sonnett |date = August 2014 |title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M |journal = The Astrophysical Journal |volume = 791 |issue = 2 |page = 11 |bibcode = 2014ApJ...791..121M |doi = 10.1088/0004-637X/791/2/121 |arxiv = 1406.6645 |access-date= 8 December 2016}}
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