7346 Boulanger
From Wikipedia, the free encyclopedia
Boulanger is a member of the Koronis family (605),[3] a very large outer asteroid family with nearly co-planar ecliptical orbits.[6] It orbits the Sun in the outer main-belt at a distance of 2.6–3.1 AU once every 4 years and 11 months (1,781 days; semi-major axis of 2.88 AU). Its orbit has an eccentricity of 0.08 and an inclination of 3° with respect to the ecliptic.[2]
The body's observation arc begins with a precovery taken at Palomar Observatory in April 1955, nearly 38 years prior to its official discovery observation at Caussols.[1]
Physical characteristics
In the SDSS-based taxonomy, Boulanger is a common, stony S-type asteroid,[5] which agrees with the overall spectral type for Koronian asteroids.[6]: 23 It has an absolute magnitude of 12.8.[1][2] As of 2018, no rotational lightcurve of Boulanger has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Boulanger measures 7.378 kilometers in diameter and its surface has an albedo of 0.270.[4]
