4429 Chinmoy

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4429 Chinmoy
Asteroid-4429-Chinmoy.jpg
Chinmoy imaged in November 2015
Discovery [1]
Discovered by N. Chernykh
Discovery site Crimean Astrophysical Obs.
Discovery date12 September 1978
Designations
(4429) Chinmoy
Named after
 Sri Chinmoy [1]
(Indian spiritual leader)
1978 RJ2 ·1978 RN1
1978 RR4 ·1980 FP2
1980 FX6 ·1987 DL2
main-belt [1] [2]  ·(inner)
Nysa [3]
Orbital characteristics [2]
Epoch 05 May 2025 (JD 2460800.5)
Uncertainty parameter 0
Observation arc 70.27 yr (25,667 d)
Aphelion 2.888141253195207 AU
Perihelion 1.872856138062281 AU
2.380498695628744 AU
Eccentricity 0.2132505086008386
3.672908624768403 yr (1341,529875196659 d)
227.6172089339865°
0° 16m 6.24s / day
Inclination 1.457653536105314°
326.8470471482925°
67.97928881241477°
Physical characteristics
3.498±0.959  km [4]
P1= 44.99 ±0.05h P2= 50.35 ±0.08h
0.229±0.145 [4]
S (Nysian member) [3]
14.6 [1] [2]

    4429 Chinmoy, provisional designation 1978 RJ2, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 3.5 kilometers (2.2 miles) 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. [1] The likely S-type asteroid was named after Indian spiritual leader Sri Chinmoy. [1]

    Contents

    Orbit and classification

    Chinmoy moving across the sky

    Chinmoy is a member of the Nysa family ( 405 ), [3] one of the largest asteroid families and part of the Nysa–Polana complex with nearly 20 thousand identified members. [5]

    It orbits the Sun in the inner main-belt at a distance of 1.9–2.9  AU once every 3 years and 8 months (1,341 days; semi-major axis of 2.38 AU). Its orbit has an eccentricity of 0.21 and an inclination of 1° with respect to the ecliptic. [2]

    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. [1]

    Physical characteristics

    Chinmoy has an absolute magnitude of 14.6. [2] While its 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). [2] [3] 4429 Chinmoy appears to be in non-principal axis rotation ("tumbling") with P1= 44.99 ±0.05h main period and P2= 50.35 ±0.08h secondary period (Center for Solar System Studies Observatory, August 2022). [2]

    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 albedo of 0.229. [4]

    Naming

    This minor planet was named after Indian spiritual leader Sri Chinmoy (1931–2007). [1] The official naming citation was published by the Minor Planet Center on 25 April 1994 ( M.P.C. 23351). [6]

    References

    1. 1 2 3 4 5 6 7 8 "4429 Chinmoy (1978 RJ2)". Minor Planet Center. Retrieved 23 May 2018.
    2. 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 4429 Chinmoy (1978 RJ2)" (2017-05-02 last obs.). Jet Propulsion Laboratory . Retrieved 23 May 2018.
    3. 1 2 3 4 "Asteroid 4429 Chinmoy". Small Bodies Data Ferret. Retrieved 23 May 2018.
    4. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68.
    5. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv: 1502.01628 . Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN   9780816532131.
    6. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 23 May 2018.
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