4429 Chinmoy

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4429 Chinmoy is a small asteroid in the inner part of the asteroid belt, about 3.5 kilometers wide. It belongs to the Nysa family, a large group of asteroids. It was discovered on September 12, 1978, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij (Crimea). The asteroid was named after Indian spiritual leader Sri Chinmoy.

Orbit and size:
Chinmoy orbits the Sun every about 3.67 years (about 1,341 days) at a distance of roughly 1.87 to 2.89 astronomical units. Its orbit is slightly elongated (eccentricity ~0.21) and tilted by about 1.5 degrees to the plane of the solar system. Its diameter is about 3.5 km, and its surface reflects about 23% of the sunlight it receives (an albedo of ~0.23). Its absolute magnitude is 14.6. It is likely a stony S-type asteroid, matching its Nysa family membership.

Rotation:
Chinmoy spins in a tumbling (non-simple) motion, with two observed rotation periods of about 45 hours and 50 hours.

Other notes:
A precovery image from 1954 at Palomar Observatory extends the observation record. NEOWISE measurements provide the diameter and albedo used above.