9260 Edwardolson

9260 Edwardolson
Discovery [1]
Discovered by Indiana Asteroid Program
Discovery site Goethe Link Obs.
Discovery date 8 October 1953
Designations
MPC designation 9260 Edwardolson
Named after
 Edward C. Olson
(astronomer)[2]
1953 TA1 · 1991 QH
main-belt · Flora [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 61.77 yr (22,562 days)
Aphelion 2.8170 AU
Perihelion 1.7626 AU
2.2898 AU
Eccentricity 0.2302
3.47 yr (1,266 days)
297.95°
Inclination 5.0971°
214.60°
148.34°
Known satellites 1 [lower-alpha 1][4]
Physical characteristics
Dimensions 4.115±0.362 km[5]
4.052 km[6]
4.05 km (taken)[3]
3.0852±0.0001 h[7]
0.2620±0.0369[5]
0.1643[6]
S [3]
14.1[1]
14.54[3][6]
14.0[5]

    9260 Edwardolson, provisional designation 1953 TA1, is a stony binary[lower-alpha 1] asteroid from the inner regions of the asteroid belt, about 4.1 kilometers in diameter. It was discovered by the Indiana Asteroid Program at the U.S Goethe Link Observatory in Indiana, on 8 October 1953.[8]

    The 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 (1,266 days). Its orbit shows an eccentricity of 0.23 and an inclination of 5 degrees from the plane of the ecliptic.[1]

    A photometric light-curve analysis performed at several places including the Slovakian Skalnaté pleso Observatory, rendered a rotation period of 3.0852±0.0001 hours with a low brightness amplitude of 0.11 in magnitude, which suggests that the body has a nearly spheroidal shape.[7] 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.[5][6]

    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 (17.785±0.003 hours),[4] and an estimated mean-diameter ratio of 0.27±0.03, which would give the satellite a diameter of approximately 1.0 to 1.3 kilometers.[lower-alpha 1]

    The minor planet was named in honor of American astronomer Edward C. Olson (b. 1930) of the University of Illinois whose observations demonstrated how the outer layers of mass-gaining stars are distorted, and how angular momentum from the mass-transfer process can spin stars up close to the stability limit.[2] Olson is also an active member of the International Astronomical Union, affiliated with its Division G Stars and Stellar Physics.[9]

    References

    1. 1 2 3 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 17.785±0.003 hours. The primary rotates with a period of 3.0852±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 0.27±0.03.
      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
    1. 1 2 3 4 "JPL Small-Body Database Browser: 9260 Edwardolson (1953 TA1)" (2015-07-17 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
    2. 1 2 Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (9260) Edwardolson, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 44. ISBN 978-3-540-34360-8. Retrieved January 2016.
    3. 1 2 3 4 "LCDB Data for (9260) Edwardolson". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
    4. 1 2 Johnston, Robert. "(9260) Edwardolsen". johnstonsarchive.net. Retrieved January 2016.
    5. 1 2 3 4 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. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved January 2016.
    6. 1 2 3 4 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 January 2016.
    7. 1 2 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 January 2016.
    8. ↑ "9260 Edwardolson (1953 TA1)". Minor Planet Center. Retrieved January 2016.
    9. ↑ "Edward C. Olson". IAU – International Astronomical Union. Retrieved January 2016.

    External links


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