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{{Infobox planet
| minorplanet = yes
| name = 4429 Chinmoy
| background = #D6D6D6
| image = Asteroid-4429-Chinmoy.jpg
| image_size = 270
| caption = ''Chinmoy'' imaged in November 2015
| discovery_ref =  <ref name="MPC-object" />
| discoverer = [[Nikolai Chernykh|N. Chernykh]]
| discovery_site = {{nowrap|[[Crimean Astrophysical Observatory|Crimean Astrophysical Obs.]]}}
| discovered = 12 September 1978
| mpc_name = (4429) Chinmoy
| alt_names = {{mp|1978 RJ|2}}{{·}}{{mp|1978 RN|1}}<br />{{mp|1978 RR|4}}{{·}}{{mp|1980 FP|2}}<br />{{mp|1980 FX|6}}{{·}}{{mp|1987 DL|2}}
| pronounced =
| named_after = [[Sri Chinmoy]] <ref name="MPC-object" /><br />{{small|(Indian spiritual leader)}}
| mp_category = [[main-belt]] <ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([[Kirkwood gap|inner]])}}<br />[[Nysa family|Nysa]] <ref name="Ferret" />
| orbit_ref =  <ref name="jpldata" />
| epoch = 23 March 2018 ([[Julian day|JD]] 2458200.5)
| uncertainty = 0
| observation_arc = 63.18 [[Julian year (astronomy)|yr]] (23,076 d)
| aphelion = 2.8874 [[Astronomical unit|AU]]
| perihelion = 1.8728 AU
| semimajor = 2.3801 AU
| eccentricity = 0.2131
| period = 3.67 yr (1,341 d)
| mean_anomaly = 249.44[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.2684|sup=ms}} / day
| inclination = 1.4590°
| asc_node = 326.92°
| arg_peri = 68.070°
| mean_diameter = {{val|3.498|0.959|ul=km}}<ref name="Masiero-2011" />
| rotation =
| albedo = {{val|0.229|0.145}}<ref name="Masiero-2011" />
| spectral_type = [[S-type asteroid|S]] {{small|(Nysian member)}}<ref name="Ferret" />
| abs_magnitude = 14.6<ref name="MPC-object" /><ref name="jpldata" />
}}

'''4429 Chinmoy''', provisional designation {{mp|1978 RJ|2}}, is a Nysian [[asteroid]] from the inner regions of the [[asteroid belt]], approximately {{convert|3.5|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 12 September 1978, by Soviet astronomer [[Nikolai Chernykh]] at the [[Crimean Astrophysical Observatory]] in Nauchnij, on the Crimean Peninsula.<ref name="MPC-object" /> The likely [[S-type asteroid]] was named after Indian spiritual leader [[Sri Chinmoy]].<ref name="MPC-object" />

== Orbit and classification ==
[[File:Video-Asteroid-4429-Chinmoy.webm|thumb|left|''Chinmoy'' moving across the sky]]

''Chinmoy'' is a member of the [[Nysa family]] ({{small|[[FIN tbl#405|405]]}}),<ref name="Ferret" /> one of the largest [[asteroid families]] and part of the [[Nysa–Polana complex]] with nearly 20 thousand identified members.<ref name="Nesvorny-2014" />

It orbits the Sun in the [[Kirkwood gap|inner]] main-belt at a distance of 1.9–2.9 [[Astronomical unit|AU]] once every 3 years and 8 months (1,341 days; [[semi-major axis]] of 2.38 AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.21 and an [[orbital inclination|inclination]] of 1[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" />

The body's [[observation arc]] begins with a [[precovery]] taken at [[Palomar Observatory]] in February 1954, more than 24 years prior to its official discovery observation at Nauchnij.<ref name="MPC-object" />

== Physical characteristics ==

''Chinmoy'' has an [[absolute magnitude]] of 14.6.<ref name="jpldata" /> While its [[Asteroid spectral type|spectral type]] has not been determined, it is likely a stony [[S-type asteroid]] based on its membership to the Nysa family and its albedo ''(see below)''.<ref name="jpldata" /><ref name="Ferret" /> As of 2018, no rotational [[lightcurve]] of ''Chinmoy'' has been obtained from [[Photometry (astronomy)|photometric]] observations. The body's [[rotation period]], [[Poles of astronomical bodies|pole]] and shape remain unknown.<ref name="jpldata" />

=== Diameter and albedo ===

According to the survey carried out by the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]], ''Chinmoy'' measures 3.498 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] of 0.229.<ref name="Masiero-2011" />

== Naming ==

This [[minor planet]] was named after Indian spiritual leader [[Sri Chinmoy]] (1931–2007).<ref name="MPC-object" /> The official naming citation was published by the [[Minor Planet Center]] on 25 April 1994 ({{small|[[Minor Planet Circulars|M.P.C.]] 23351}}).<ref name="MPC-Circulars-Archive" />

== References ==
{{reflist|30em|refs=

<ref name="jpldata">{{cite web
|type = 2017-05-02 last obs.
|title = JPL Small-Body Database Browser: 4429 Chinmoy (1978 RJ2)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004429
|publisher = [[Jet Propulsion Laboratory]]
|access-date = 23 May 2018}}</ref>

<ref name="MPC-object">{{cite web
|title = 4429 Chinmoy (1978 RJ2)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=4429
|access-date = 23 May 2018}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 23 May 2018}}</ref>

<ref name="Ferret">{{cite web
|title = Asteroid 4429 Chinmoy
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4429+Chinmoy
|access-date = 23 May 2018}}</ref>

<ref name="Nesvorny-2014">{{Cite book
|first1 = D. |last1 = Nesvorný
|first2 = M. |last2 = Broz
|first3 = V. |last3 = Carruba
|date = December 2014
|title = Identification and Dynamical Properties of Asteroid Families
|journal = Asteroids IV
|pages = 297–321
|bibcode = 2015aste.book..297N
|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628
|isbn = 9780816532131
}}</ref>

<ref name="Masiero-2011">{{cite journal
|display-authors = 6
|first1 = Joseph R. |last1 = Masiero
|first2 = A. K. |last2 = Mainzer
|first3 = T. |last3 = Grav
|first4 = J. M. |last4 = Bauer
|first5 = R. M. |last5 = Cutri
|first6 = J. |last6 = Dailey
|first7 = P. R. M. |last7 = Eisenhardt
|first8 = R. S. |last8 = McMillan
|first9 = T. B. |last9 = Spahr
|first10 = M. F. |last10 = Skrutskie
|first11 = D. |last11 = Tholen
|first12 = R. G. |last12 = Walker
|first13 = E. L. |last13 = Wright
|first14 = E. |last14 = DeBaun
|first15 = D. |last15 = Elsbury
|first16 = T., IV |last16 = Gautier
|first17 = S. |last17 = Gomillion
|first18 = A. |last18 = Wilkins
|date = November 2011
|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 20
|bibcode = 2011ApJ...741...68M
|doi = 10.1088/0004-637X/741/2/68
|arxiv = 1109.4096
}}</ref>

}} 

== External links ==
* [http://www.astrode.de/11chimmoyj15.htm (4429) Chinmoy], at astrode.de (2015), {{in lang|de}}
* [http://astronomia.zcu.cz/planety/planetka-4429 (4429) Chinmoy], orbit at astronomia.zcu.cz
* [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{AstDys|4429}}
* {{JPL small body}}

{{Use dmy dates|date=May 2018}}
{{Minor planets navigator |4428 Khotinok |number=4429 |4430 Govorukhin}}
{{Small Solar System bodies}}

{{DEFAULTSORT:Chinmoy}}
[[Category:Nysa asteroids|004429]]
[[Category:Discoveries by Nikolai Chernykh]]
[[Category:Minor planets named for people]]
[[Category:Named minor planets]]
[[Category:Sri Chinmoy|4429 Chinmoy]]
[[Category:Articles containing video clips|4429 Chinmo]]
[[Category:Astronomical objects discovered in 1978|19780912]]

4429 Chinmoy - Revision history

>Riquix at 06:12, 24 May 2021