Discovered by E. Bowell MPC designation 2433 Sootiyo Discovered 5 April 1981 Orbits Sun | Discovery date 5 April 1981 Minor planet category main-belt · (middle) Absolute magnitude 11.8 Discoverer Edward L. G. Bowell Asteroid group Asteroid belt | |
Alternative names 1981 GJ · 1939 KA1960 KA · 1969 QF1974 VZ1 · 1978 SG61978 UL People also search for 2432 Soomana, Sun, 2648 Owa | ||
2433 Sootiyo, provisional designation 1981 GJ, is a stony asteroid from the middle region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 5 April 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona.
The stony S-type asteroid is also classified as a transitional LS-type by PanSTARRS large-scale survey. It orbits the Sun at a distance of 2.0–3.2 AU once every 4 years and 3 months (1,537 days). Its orbit has an eccentricity of 0.22 and an inclination of 10° with respect to the ecliptic. The first used precovery was taken at Palomar Observatory in 1953, extending the asteroid's observation arc by 28 years prior to its discovery observation.
French amateur astronomer René Roy obtained a rotational light-curve from photometric observations in October 2007. I gave a rotation period of 7000722980000000000♠7.2298±0.0002 hours with a brightness variation of 0.54 magnitude (U=2+), superseding observations by Brazilian Cláudia Angeli and by the Spanish ECLA project, which both gave a period of 7 hours with an amplitude of 0.57 and 0.4 magnitude, respectively (U=1/2).
According to the survey carried out by the Japanese Akari satellite, the asteroid measures 14.9 kilometers in diameter and its surface has an albedo of 0.156, while two different data sets from NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission give a diameter of 12.1 and 12.9 kilometers with an albedo of 0.269 and 0.304, respectively. The Collaborative Asteroid Lightcurve Link agrees with the results obtained by Akari, assuming a standard albedo for stony asteroids of 0.20 and calculating a diameter of 14.9 kilometers, based on an absolute magnitude of 11.5.
The minor planet is named "Sootiya" which means "star boy" in the language of the Hopi Tribe of northern Arizona. Correspondingly, the Vestian asteroid 2432 Soomana stands for "star girl". Naming citation was proposed by Michael Lomatewama and Ekkehart Malotki and published on 8 February 1982 (M.P.C. 6650).