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1980 Tezcatlipoca

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1980 Tezcatlipoca
Light curve-based 3D-model of 1980 Tezcatlipoca
Discovery [1]
Discovered byA. G. Wilson
A.A.E. Wallenquist
Discovery sitePalomar Obs.
Discovery date19 June 1950
Designations
1980 Tezcatlipoca
Named after
Tezcatlipoca
(Aztec creator god)[2]
1950 LA
Amor · NEO [1]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc65.95 yr (24,089 days)
Aphelion2.3333 AU
Perihelion1.0860 AU
1.7097 AU
Eccentricity0.3648
2.24 yr (817 days)
152.28°
0° 26m 27.24s / day
Inclination26.859°
246.60°
115.42°
Earth MOID0.2445 AU
Physical characteristics
Dimensions4.3 km[1]
4.50±0.04 km[3]
5.998 km[4]
6.00 km (taken)[5]
6.012±0.083 km[6]
6.66 km[7]
7.24612±0.00005 h[8]
7.2505±0.0008 h[9]
7.25225 h[10]
7.251±0.002 h[11]
7.25226±0.00005 h[12]
0.1279[4][5]
0.132±0.028[6]
0.145[7]
0.247±0.005[3]
0.25[1]
0.47±0.43[13]
B–V = 0.955[1]
U–B = 0.455[1]
SU (Tholen)[1]
Sl (SMASS)[1]
Sw (ExploreNEOs)[14]
S (LCDB)[5]
13.6[7]
13.92[1][3][6]
13.96±0.1[4][5][9]
14.30±1.07[15]

1980 Tezcatlipoca, provisional designation 1950 LA, is an eccentric, stony asteroid, classified as a near-Earth object of the Amor group of asteroids, approximately 6 kilometers in diameter. It was discovered on 19 June 1950, by American astronomer Albert G. Wilson and Swedish astronomer Åke Wallenquist at the U.S. Palomar Observatory in California.[16]

The S-type asteroid is classified as a Sw-type by the ExploreNEOs project,[14] and as a SU and Sl-type on the Tholen and SMASS taxonomic scheme, respectively.[1] It orbits the Sun at a distance of 1.1–2.3 AU once every 2 years and 3 months (817 days). Its orbit has an eccentricity of 0.36 and an inclination of 27° with respect to the ecliptic.[1] Its Earth minimum orbit intersection distance is slightly less than 0.245 AU (36,700,000 km)*, which corresponds to 95.3 lunar distances.[1]

Between 1988 and 2015, five rotational light-curves were obtained for this asteroid from photometric observations and gave a well-defined, concurring rotation period of 7.25 hours with a brightness variation between 0.22 and 1.01 in magnitude, indicative of a non-spheroidal shape (U=3/n.a./2+/3-/n.a.).[8][9][10][11][12]

According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 4.5 and 6.0 kilometers in diameter and its surface has an albedo between 0.128 and 0.247.[3][4][6] The Collaborative Asteroid Lightcurve Link agrees with the revised NEOWISE observations, that is, an albedo of 0.128 and a diameter of 6.0 kilometers, based on an absolute magnitude of 13.96.[5]

The asteroid was named after Tezcatlipoca, the Aztech deity of matter, whose name translates to "Smoking Mirror" in the Nahuatl language. His animal counterpart was the jaguar and his contender was Quetzálcoatl, after which the minor planet 1915 Quetzálcoatl is named. Both deities are Aztec creator gods and were depicted as twin serpents that coil round each other to produce time.[2] Naming citation was published before November 1977 (M.P.C. 4237).[17]

References

  1. ^ a b c d e f g h i j k l m "JPL Small-Body Database Browser: 1980 Tezcatlipoca (1950 LA)" (2016-06-01 last obs.). Jet Propulsion Laboratory. Retrieved 30 August 2016.
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1980) Tezcatlipoca. Springer Berlin Heidelberg. p. 160. ISBN 978-3-540-00238-3. Retrieved 30 August 2016.
  3. ^ 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". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 30 August 2016.
  4. ^ a b c d 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 30 August 2016.
  5. ^ a b c d e "LCDB Data for (1980) Tezcatlipoca". Asteroid Lightcurve Database (LCDB). Retrieved 30 August 2016.
  6. ^ 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 30 August 2016.
  7. ^ a b c Harris, Alan W.; Davies, John K. (December 1999). "Physical Characteristics of Near-Earth Asteroids from Thermal Infrared Spectrophotometry". Icarus. 142 (2): 464–475. Bibcode:1999Icar..142..464H. doi:10.1006/icar.1999.6248. Retrieved 30 August 2016.
  8. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1980) Tezcatlipoca". Geneva Observatory. Retrieved 30 August 2016.
  9. ^ a b c Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 30 August 2016.
  10. ^ a b Kaasalainen, Mikko; Pravec, Petr; Krugly, Yurij N.; Sarounová, Lenka; Torppa, Johanna; Virtanen, Jenni; et al. (January 2004). "Photometry and models of eight near-Earth asteroids". Icarus. 167 (1): 178–196. Bibcode:2004Icar..167..178K. doi:10.1016/j.icarus.2003.09.012. Retrieved 30 August 2016.
  11. ^ a b Warner, Brian D. (October 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 March-June". The Minor Planet Bulletin. 42 (4): 256–266. Bibcode:2015MPBu...42..256W. ISSN 1052-8091. Retrieved 30 August 2016.
  12. ^ a b Hanus, J.; Delbo', M.; Durech, J.; Alí-Lagoa, V. (August 2015). "Thermophysical modeling of asteroids from WISE thermal infrared data - Significance of the shape model and the pole orientation uncertainties". Icarus. 256: 101–116. arXiv:1504.04199. Bibcode:2015Icar..256..101H. doi:10.1016/j.icarus.2015.04.014. Retrieved 30 August 2016.
  13. ^ Thomas, C. A.; Trilling, D. E.; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A. M.; et al. (September 2011). "ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population". The Astronomical Journal. 142 (3): 12. Bibcode:2011AJ....142...85T. doi:10.1088/0004-6256/142/3/85. Retrieved 26 December 2015.
  14. ^ a b Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects" (PDF). Icarus. 228: 217–246. arXiv:1310.2000. Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. Retrieved 30 August 2016.
  15. ^ 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 30 August 2016.
  16. ^ "1980 Tezcatlipoca (1950 LA)". Minor Planet Center. Retrieved 30 August 2016.
  17. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 August 2016.
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