2433 Sootiyo

From Wikipedia, the free encyclopedia
Jump to: navigation, search
2433 Sootiyo
Discovery [1]
Discovered by E. Bowell
Discovery site Anderson Mesa Stn.
Discovery date 5 April 1981
MPC designation 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 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 62.84 yr (22,953 days)
Aphelion 3.1848 AU
Perihelion 2.0289 AU
2.6068 AU
Eccentricity 0.2217
4.21 yr (1,537 days)
0° 14m 3.12s / day
Inclination 10.366°
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]
7 h[a]
7.2298±0.0002 h[8]
0.20 (assumed)[3]
LS[9] · S[3]

2433 Sootiyo, provisional designation 1981 GJ, is a stony asteroid from the middle region of the asteroid belt, approximately 14 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 stony S-type asteroid is also classified as a transitional LS-type by PanSTARRS large-scale survey.[9] 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.[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]

French amateur astronomer René Roy obtained a rotational light-curve from photometric observations in October 2007. I gave a rotation period of 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).[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, based on an absolute magnitude of 11.5.[3]

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".[2] Naming citation was proposed by Michael Lomatewama and Ekkehart Malotki and published on 8 February 1982 (M.P.C. 6650).[11]


  1. ^ a b ECLA (2011) web: rotation period hours with a brightness amplitude of mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (2433) Sootiyo Proyecto ECLA (Silvia Alonso Perez) (2011)
  1. ^ a b c d e f "JPL Small-Body Database Browser: 2433 Sootiyo (1981 GJ)" (2016-08-13 last obs.). Jet Propulsion Laboratory. Retrieved 1 September 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2433) Sootiyo. Springer Berlin Heidelberg. p. 198. ISBN 978-3-540-00238-3. Retrieved 1 September 2016. 
  3. ^ a b c d e f "LCDB Data for (2433) Sootiyo". Asteroid Lightcurve Database (LCDB). Retrieved 1 September 2016. 
  4. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645free to read. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 1 September 2016. 
  5. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407free to read. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 1 September 2016. 
  6. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 1 September 2016. 
  7. ^ a b Angeli, C. A.; Guimarã; es, T. A.; Lazzaro, D.; Duffard, R.; Fernández, S.; et al. (April 2001). "Rotation Periods for Small Main-Belt Asteroids From CCD Photometry". The Astronomical Journal. 121 (4): 2245–2252. Bibcode:2001AJ....121.2245A. doi:10.1086/319936. Retrieved 1 September 2016. 
  8. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (2433) Sootiyo". Geneva Observatory. Retrieved 1 September 2016. 
  9. ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762free to read. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 1 September 2016. 
  10. ^ a b "2433 Sootiyo (1981 GJ)". Minor Planet Center. Retrieved 1 September 2016. 
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 September 2016. 

External links[edit]