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]
It orbits the Sun in the inner main-belt at a distance of 1.9–2.9AU once every 3 years and 8 months (1,341 days; semi-major axis of 2.38AU). Its orbit has an eccentricity of 0.21 and an inclination of 1° with respect to the ecliptic.[2]
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]
123Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; etal. (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.
