| Discovery[1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 5 April 1981 |
| Designations | |
| (2433) Sootiyo | |
Named after | "star boy"(Hopi language)[2] |
| 1981 GJ · 1939 KA 1960 KA · 1969 QF 1974 VZ1 · 1978 SG6 1978 UL | |
| main-belt · (middle)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.40 yr (23,157 days) |
| Aphelion | 3.1849AU |
| Perihelion | 2.0276 AU |
| 2.6062 AU | |
| Eccentricity | 0.2220 |
| 4.21yr (1,537 days) | |
| 195.45° | |
| 0° 14m 3.48s / day | |
| Inclination | 10.366° |
| 188.27° | |
| 71.294° | |
| Physical characteristics | |
| Dimensions | 12.076±0.136 km[1][4] 12.946±0.103 km[5] 14.85±0.37 km[6] 14.89 km(calculated)[3] |
| 7h[7][a] 7.2298±0.0002 h[8] | |
| 0.156±0.009[6] 0.20(assumed)[3] 0.2690±0.0630[5] 0.304±0.062[1][4] | |
| LS[9] · S[3] | |
| 11.5[1][3][5] · 11.80[6] · 11.86±0.62[9] | |
2433 Sootiyo, provisional designation1981 GJ, is a stonyasteroid from the middle region of theasteroid belt, approximately 13 kilometers in diameter. It was discovered on 5 April 1981, by American astronomerEdward Bowell at Lowell'sAnderson Mesa Station near Flagstaff, Arizona.[10] The asteroid was named "Sootiya" meaning "star boy" in theHopi language.[2]
Sootiyo orbits the Sun in thecentral main-belt at a distance of 2.0–3.2 AU once every 4 years and 3 months (1,537 days). Its orbit has aneccentricity of 0.22 and aninclination of 10° with respect to theecliptic.[1] The first usedprecovery was taken atPalomar Observatory in 1953, extending the asteroid'sobservation arc by 28 years prior to its discovery observation.[10]
PanSTARRS photometric survey characterizedSootiyo as a LS-type, an intermediary between the stonyS-type and rareL-type asteroids.[9]
French amateur astronomerRené Roy obtained a rotationallightcurve from photometric observations in October 2007. It gave arotation period of7.2298 hours with a brightness variation of 0.54magnitude (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).[7][a]
According to the survey carried out by the JapaneseAkari satellite, the asteroid measures 14.9 kilometers in diameter and its surface has analbedo of 0.156,[6] while two different data sets from NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission give a diameter of 12.1 and 12.9 kilometers with an albedo of 0.269 and 0.304, respectively.[4][5]
TheCollaborative 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 with anabsolute magnitude of 11.5.[3]
Thisminor planet is named "Sootiya" which means "star boy" in thelanguage of theHopi Tribe of northern Arizona. Correspondingly, the Vestian asteroid2432 Soomana stands for "star girl".[2] Naming citation was proposed by Michael Lomatewama and Ekkehart Malotki and published on 8 February 1982 (M.P.C. 6650).[11]
