Discovered by E. F. Helin MPC designation 19982 Barbaradoore Discovered 22 January 1990 Orbits Sun | Discovery date 22 January 1990 Alternative names 1990 BJ · 1983 AD2 Absolute magnitude 13.1 Discoverer Eleanor F. Helin Asteroid group Asteroid belt | |
Minor planet category Mars crosser main-belt Similar 4015 Wilson–Harrington, Sun, 6489 Golevka, 9969 Braille, 4769 Castalia | ||
19982 Barbaradoore, provisional designation 1990 BJ, is an eccentric, stony asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by American astronomer Eleanor Helin at the U.S. Palomar Observatory, California, on 22 January 1990.
The S-type asteroid orbits the Sun at a distance of 1.7–3.0 AU once every 3 years and 7 months (1,303 days). Its orbit has an eccentricity of 0.29 and an inclination of 22° with respect to the ecliptic. The Collaborative Asteroid Lightcurve Link (CALL) also classifies it as a Mars-crossing asteroid, because its perihelion lies between 1.3 and 1.668 AU (with no rounding), while the MPC and JPL's database exclusively classifies the body as a main-belt and not as a Mars-crosser, since its perihelion of 1.6685 AU is larger than the aphelion of Mars (1.666 AU). By these standards, the body does not even classify for an outer Mars grazer.
A photometric light-curve analysis by Czech astronomer Petr Pravec at Ondřejov Observatory in 2010, rendered a well-defined rotation period of 7000331620000000000♠3.3162±0.0003 hours with a brightness amplitude of 0.28 in magnitude (U=3). According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the asteroid has a high albedo of 0.35 and 0.31 with a corresponding diameter of 5.0 and 5.7 kilometers, respectively, while CALL assumes an albedo of 0.20, which is a more typical value for stony asteroids, and calculates a diameter of 4.7 kilometers.
The minor planet was named after a cousin of the discoverer, Barbara Hendricks Doore (b. 1933). She is described by the discoverer as an admirer of sports and as an appreciated leader and volunteer, who has dedicated much of her time at Cathedral City's Boys and Girls Club in California. Naming citation was published on 24 June 2002 (M.P.C. 46012).