2874 Jim Young, provisional designation 1982 TH, is a stony Florian asteroid and slow rotator from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 13 October 1982, by American astronomer Edward Bowell at Lowell Observatory's Anderson Mesa Station near Flagstaff, Arizona.[9] The asteroid was named after American astronomer James Young.[2]
Orbit and classification
Jim Young is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,228 days). Its orbit has an eccentricity of 0.13 and an inclination of 5° with respect to the ecliptic.[1] A first precovery was taken at the Palomar Observatory in 1954, extending the asteroid's observation arc by 28 years prior to its official discovery observation at Anderson Mesa.[9]
Jim Young is a slow rotator. These are bodies that take much longer to rotate once around their axis than most other asteroids typically do. In January 2007, a rotational lightcurve was obtained by American astronomer Donald P. Pray at his Carbuncle Hill Observatory (912). It gave a long rotation period of 131.3 hours with a brightness variation of approximately 0.75 in magnitude (U=2).[7]
Diameter and albedo
According to two different data sets from NASA's space-based Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Jim Young measures between 6.6 and 7.7 kilometers in diameter and its surface has an albedo between 0.190 and 0.251.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the family's largest member and namesake – and calculates a diameter of 7.5 kilometers with an absolute magnitude of 12.8.[3]
