2227 Otto Struve
From Wikipedia, the free encyclopedia
The asteroid orbits the Sun in the inner main-belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,222 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic. It was first identified as 1935 UP at the Johannesburg Observatory in 1935, extending the body's observation arc by 20 years prior to its official discovery observation.[5]
Physical characteristics
As of 2016, the asteroid's composition, rotation period and shape remain unknown. According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 4.7 kilometers in diameter and its surface has an albedo of 0.388.[3] Based on its absolute magnitude of 13.4, it has an estimated diameter between 5 and 13 kilometers, assuming an albedo in the range of 0.05 to 0.25.[4] Since most asteroids in the inner main-belt are of a silicaceous rather than of a carbonaceous composition, with higheralbedos, typically around 0.20, the asteroid's diameter might be on the lower end of NASA's published conversion table, as the higher the reflectivity (albedo), the smaller the body's diameter at a constant intrinsic brightness (absolute magnitude).[4]
