View source for 4429 Chinmoy

{{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   = &thinsp;<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]]&thinsp;<ref name="MPC-object" /><br />{{small|(Indian spiritual leader)}}
 | mp_category     = [[main-belt]]&thinsp;<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([[Kirkwood gap|inner]])}}<br />[[Nysa family|Nysa]]&thinsp;<ref name="Ferret" />
 | orbit_ref       = &thinsp;<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&nbsp;[[Astronomical unit|AU]] once every 3 years and 8 months (1,341 days; [[semi-major axis]] of 2.38&nbsp;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>

}} <!-- end of reflist -->

== 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]]