|Discovered by||Indiana University
(Indiana Asteroid Program)
|Discovery site||Goethe Link Obs.|
|Discovery date||8 October 1953|
|MPC designation||9260 Edwardolson|
|Edward C. Olson
|1953 TA1 · 1991 QH|
|main-belt · Flora |
|Orbital characteristics |
|Epoch 31 July 2016 (JD 2457600.5)|
|Uncertainty parameter 0|
|Observation arc||61.77 yr (22,562 days)|
|3.46 yr (1,265 days)|
|0° 17m 4.2s / day|
|Known satellites||1 [a]|
|Earth MOID||0.7619 AU|
|Dimensions||4.05 km (taken)
±0.362 km 4.115
9260 Edwardolson, provisional designation 1953 TA1, is a Florian binary[a] asteroid from the inner regions of the asteroid belt, approximately 4.1 kilometers in diameter. It was discovered on 8 October 1953, by Indiana University during its Indiana Asteroid Program at Goethe Link Observatory in Brooklyn, Indiana, United States.
The stony S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.8–2.8 AU once every 3 years and 6 months (1,265 days). Its orbit has an eccentricity of 0.23 and an inclination of 5° with respect to the ecliptic. As no precoveries were taken, the asteroid's observation arc begins with its discovery in 1953.
A rotational light-curve for this asteroid was obtained from photometric observations in several locations including the Slovakian Skalnaté pleso Observatory. It rendered a rotation period of ±0.0001 hours with a low brightness variation of 0.11 in 3.0852magnitude, which suggests that the body has a nearly spheroidal shape (U=n/a). According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid has an albedo of 0.26 and 0.16, and an respective absolute magnitude of 14.0 and 14.54. Both data sets converge to a diameter of 4.1 kilometers.
In 2005, a satellite was discovered around the asteroid, making it a binary system. The minor-planet moon has a fairly short orbital period of 17 hours, 47 minutes, and 2 seconds (±0.003 hours), 17.785 and an estimated mean-diameter ratio of ±0.03, which would give the satellite a diameter of approximately 1.0 to 1.3 kilometers. 0.27[a]
The minor planet was named in honor of American astronomer Edward C. Olson (b. 1930) of the University of Illinois whose observations explained the distortion of the outer layers of mass-gaining stars, and how their rotation can come close to the stability limit during the involved mass-transfer process and the preserved angular momentum. Olson was also an active member of the International Astronomical Union, affiliated with its Division G Stars and Stellar Physics. Naming citation was published on 13 July 2004 (M.P.C. 52322).
- Central Bureau for Astronomical Telegrams, No.270, 2 November 2005, for (9260) EDWARDOLSON
A photometric observations obtained during Oct. 6-30 show that the minor planet (9260) is a binary system with an orbital period of ±0.003 hours. The primary rotates with a period of 17.785±0.0001 hours, and its lightcurve amplitude of 0.11 magnitude is indicative of a nearly spheroidal shape. Mutual eclipse/occultation events that are 0.08-0.15 mag deep indicate a secondary-to-primary mean-diameter ratio of 3.0852±0.03. 0.27
Reported by M. Jakubik and M. Husarik, Skalnate Pleso Observatory; J. Vilagi, S. Gajdos, and A. Galad, Modra Observatory; P. Pravec and P. Kusnirak, Ondrejov Observatory; W. Cooney, J. Gross and D. Terrell via Sonoita Research Observatory (Sonoita, AZ); D. Pray, Greene, RI; and R. Stephens, Yucca Valley, CA
Central Bureau for Astronomical Telegrams
- "JPL Small-Body Database Browser: 9260 Edwardolson (1953 TA1)" (2015-07-17 last obs.). Jet Propulsion Laboratory. Retrieved 24 July 2016.
- Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (9260) Edwardolson, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 44. ISBN 978-3-540-34361-5. Retrieved 24 July 2016.
- "LCDB Data for (9260) Edwardolson". Asteroid Lightcurve Database (LCDB). Retrieved 24 July 2016.
- Johnston, Robert. "(9260) Edwardolsen". johnstonsarchive.net. Retrieved 1 January 2016.
- Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 1 January 2016.
- 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:. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 24 July 2016.
- Jakubik, M.; Husarik, M.; Vilagi, J.; Gajdos, S.; Galad, A.; Pravec, P.; et al. (November 2005). "(9260) Edwardolson". Central Bureau Electronic Telegrams (270). Bibcode:2005CBET..270....1J. Retrieved 1 January 2016.
- "9260 Edwardolson (1953 TA1)". Minor Planet Center. Retrieved 24 July 2016.
- "Edward C. Olson". IAU – International Astronomical Union. Retrieved 1 January 2016.
- "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 July 2016.
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 9260 Edwardolson at the JPL Small-Body Database