2201 Oljato

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2201 Oljato
Discovery [1]
Discovered by H. L. Giclas
Discovery site Lowell Obs.
Discovery date 12 December 1947
Designations
MPC designation 2201 Oljato
Named after
Oljato–Monument Valley
(Navajo Reservation)[2]
1947 XC · 1979 VU2
1979 XA
Amor · NEO · PHA[1]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 84.90 yr (31,008 days)
Aphelion 3.7259 AU
Perihelion 0.6241 AU
2.1750 AU
Eccentricity 0.7131
3.21 yr (1,172 days)
194.26°
Inclination 2.5224°
74.995°
98.257°
Earth MOID 0.0031 AU (1.2 LD)
Physical characteristics
Dimensions 1.80±0.1 km (IRAS:11)[3]
2.15 km[4]
24 h[5]
26 h[a]
0.24[4]
0.4328±0.030 (IRAS:11)[3]
SMASS = Sq [1] · C[6] · S[7][8]
15.00[8] · 15.25[1][3] · 15.50[7][4] · 15.50±0.42[6] · 15.55[5]

2201 Oljato, provisional designation 1947 XC, is stony and extremely eccentric asteroid, classified as near-Earth object. It measures approximately 2 kilometers in diameter and is a sizable member of the Apollo asteroids, a subgroup of near-Earth asteroids which cross the orbit of Earth. It was discovered by American astronomer Henry L. Giclas at the U.S Lowell Observatory in Flagstaff, Arizona, on 12 December 1947.[9] After its discovery, the body became a lost asteroid for 32 years and was recovered under the provisional designation 1979 XA, by the American astronomers Passey and Bus at the Californian Palomar Observatory in 1979.[2]

Due to its size and its Earth minimum orbit intersection distance (MOID) of 0.0031 AU (460,000 km), which is only about 1.2 lunar distances, the near-Earth Apollo asteroid is also a potentially hazardous object. It orbits the Sun at a distance of 0.6–3.7 AU once every 3 years and 3 months (1,172 days). Its orbit has an eccentricity of 0.71 and an inclination of 3° with respect to the ecliptic.[1]

It has a rotation period of 26 hours.[a] The stony asteroid is classified as a Sq-subtype in the SMASS taxonomic scheme, with a geometric albedo of 0.24.[4] An alternative and exceptionally high albedo of 0.43 was determined by 11 observations from the Infrared Astronomical Satellite, IRAS.[3]

It was a target of Hubble search for transition comets, a spectroscopic study involving amateur astronomers and the use of the Hubble Space Telescope. The asteroid belongs to the Taurid Complex (also see Taurids), a group of near-Earth asteroids thought to be extinct cometary nuclei, that are associated with four meteor showers on Earth, due to their disintegration. The Taurid Complex includes several other Apollo asteroids such as 4183 Cuno, 4341 Poseidon, 5143 Heracles, and 5731 Zeus.[10]

The minor planet was named after the Oljato–Monument Valley in Utah, on the Navajo Indian Reservation.[2] Naming citation was published on 28 March 1983 (M.P.C. 7782).[11]

References[edit]

  1. ^ a b Pravec (1995) web: rotation period 26 hours with a brightness amplitude of 0.1 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (2201) Oljato
  1. ^ a b c d e f "JPL Small-Body Database Browser: 2201 Oljato (1947 XC)" (2016-10-25 last obs.). Jet Propulsion Laboratory. Retrieved 7 December 2016. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2201) Oljato. Springer Berlin Heidelberg. p. 179. ISBN 978-3-540-00238-3. Retrieved 7 December 2016. 
  3. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 7 December 2016. 
  4. ^ a b c d Harris, Alan W. (February 1998). "A Thermal Model for Near-Earth Asteroids". Icarus. 131 (2): 291–301. Bibcode:1998Icar..131..291H. doi:10.1006/icar.1997.5865. Retrieved 15 December 2015. 
  5. ^ a b Harris, A. W.; Young, J. W. (April 1983). "Asteroid rotation. IV". Icarus: 59–109. Bibcode:1983Icar...54...59H. doi:10.1016/0019-1035(83)90072-6. ISSN 0019-1035. Retrieved 15 December 2015. 
  6. ^ a b 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 7 December 2016. 
  7. ^ a b "LCDB Data for (2201) Oljato". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 2016. 
  8. ^ a b Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus. 268: 340–354. Bibcode:2016Icar..268..340C. doi:10.1016/j.icarus.2015.12.047. Retrieved 7 December 2016. 
  9. ^ "2201 Oljato (1947 XC)". Minor Planet Center. Retrieved 7 December 2016. 
  10. ^ Babadzhanov, P. B. (2001). "Search for meteor showers associated with Near-Earth Asteroids". Astronomy and Astrophysics. 373 (1): 329–335. Bibcode:2001A&A...373..329B. doi:10.1051/0004-6361:20010583. 
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 December 2016. 

External links[edit]