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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 asteroid was named "Sootiya" meaning "star boy" in the Hopi language.

Orbit and classification

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. 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.

Physical characteristics

PanSTARRS photometric survey characterized Sootiyo as a LS-type, an intermediary between the stony S-type and rare L-type asteroids.

Rotation period

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).

Diameter and albedo

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 with an absolute magnitude of 11.5.

Naming

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

Notes

1. ^ ECLA (2011) web: rotation period hours with a brightness amplitude of mag. Summary figures for (2433) Sootiyo at Collaborative Asteroid Lightcurve Link (CALL) and Proyecto ECLA (Silvia Alonso Perez) (2011)

References

1. ^ "JPL Small-Body Database Browser: 2433 Sootiyo (1981 GJ)" (2017-03-05 last obs.). Jet Propulsion Laboratory. Retrieved 13 June 2017.
2. ^ Schmadel, Lutz D. (2007). "(2433) Sootiyo". Dictionary of Minor Planet Names – (2433) Sootiyo. Springer Berlin Heidelberg. p. 198. doi:10.1007/978-3-540-29925-7_2434. ISBN 978-3-540-00238-3.
3. ^ "LCDB Data for (2433) Sootiyo". Asteroid Lightcurve Database (LCDB). Retrieved 1 September 2016.
4. ^ 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:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 1 September 2016.
5. ^ Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
6. ^ 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". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
7. ^ 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. ^ 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 1 September 2016.
10. ^ "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

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2433 Sootiyo at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2433 Sootiyo at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Background asteroids
• Discoveries by Edward L. G. Bowell
• Named minor planets
• Astronomical objects discovered in 1981