Discovered by L. Chernykh MPC designation 1856 Růžena Discovered 8 October 1969 Orbits Sun Asteroid group Asteroid belt | Discovery date 8 October 1969 Minor planet category main-belt · (inner) Absolute magnitude 12.8 | |
Alternative names 1969 TW1 · 1941 FP1971 DL1 Discovery site | ||
1856 Růžena, provisional designation 1969 TW1, is a stony asteroid from the inner regions of the asteroid belt, approximately 6.6 kilometers in diameter. It was discovered on 8 October 1969, by Russian astronomer Lyudmila Chernykh at Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.
The bright S-type asteroid orbits the Sun at a distance of 2.1–2.4 AU once every 3 years and 4 months (1,222 days). Its orbit has an eccentricity of 0.08 and an inclination of 5° with respect to the ecliptic. Růžena was first identified as 1941 FP at the Finnish Iso-Heikkilä Observatory. The body's observation arc, however, starts with its official discovery observation in 1969.
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Růžena measures 6.62 kilometers in diameter and its surface has an albedo of 0.335. As of 2016, the body's rotation period and shape remains unknown.
This asteroid was named in honor of Růžena Petrovicova, observer of comets and minor planets and staff member of the Kleť Observatory, located in what is now the Czech Republic. Naming citation was published before November 1977 (M.P.C. 3825).