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 | 3.1849 AU |
Perihelion | 2.0276 AU |
2.6062 AU | |
Eccentricity | 0.2220 |
4.21 yr (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] |
7
h
[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 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. [10] The asteroid was named "Sootiya" meaning "star boy" in the Hopi language. [2]
Sootiyo orbits the Sun in the central main-belt 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. [1] 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. [10]
PanSTARRS photometric survey characterized Sootiyo as a LS-type, an intermediary between the stony S-type and rare L-type asteroids. [9]
French amateur astronomer René Roy obtained a rotational lightcurve from photometric observations in October 2007. It gave a rotation period of 7.2298 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). [7] [a]
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, [6] 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. [4] [5]
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 with an absolute magnitude of 11.5. [3]
This 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". [2] Naming citation was proposed by Michael Lomatewama and Ekkehart Malotki and published on 8 February 1982 ( M.P.C. 6650). [11]