Centaur
31824 Elatus (; provisional designation 1999 UG5 centaur from the outer Solar System , approximately 48 kilometers (30 miles) in diameter. It was discovered on 29 October 1999, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory in Arizona, United States.[ 5] minor planet was named after Elatus , a centaur from Greek mythology .[ 3]
Orbit and classification
Elatus orbits the Sun at a distance of 7.3–16.3 AU once every 40 years and 7 months (14,826 days). Its orbit has an eccentricity of 0.38 and an inclination of 5° with respect to the ecliptic .[ 1]
The body's observation arc begins with a precovery taken by the Sloan Digital Sky Survey at Apache Point Observatory in September 1998, thirteen months prior to its official discovery observation.[ 5]
Naming
This minor planet was named after Elatus , a centaur from Greek mythology , who was killed during a battle with Heracles (also see 5143 Heracles ) by a poisoned arrow that passed through his arm and continued to wound Chiron in the knee (also see 2060 Chiron ) . The name "Elatus" means "fir man" and is associated with woodlands.[ 3] naming citation was published by the Minor Planet Center on 14 June 2003 (M.P.C. 49102[ 15]
Physical characteristics
Rotation period
Two rotational lightcurves of Elatus were obtained from photometric observations. Lightcurve analysis gave a longer-than-average rotation period of 26.5 and 26.82 hours with a concurring brightness variation of 0.10 magnitude (U=2/2 [ 8] [ 9]
Diameter and albedo
According to observations by ESA's Herschel Space Observatory with its PACS instrument and the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer Elatus measures 49.8 and 57.000 kilometers in diameter and its surface has an albedo of 0.049 and 0.050, respectively.[ 6] [ 7] Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous minor planets of 0.057 and derives a diameter of 45.87 kilometers based on an absolute magnitude of 10.42.[ 4]
See also
References
^ a b c d e "JPL Small-Body Database Browser: 31824 Elatus (1999 UG5)" (2009-04-18 last obs.). Jet Propulsion Laboratory . Retrieved 21 September 2017 .^ Noah Webster (1884) A Practical Dictionary of the English Language
^ a b c Schmadel, Lutz D. (2006). "(31824) Elatus [11.8, 0.38, 5.3]". Dictionary of Minor Planet Names – Addendum to Fifth Edition: 2003–2005 . Springer Berlin Heidelberg . p. 198. doi :10.1007/978-3-540-34361-5_2331 . ISBN 978-3-540-34361-5 ^ a b c d e "LCDB Data for (31824) Elatus" . Asteroid Lightcurve Database (LCDB). Retrieved 21 September 2017 .^ a b c "31824 Elatus (1999 UG5)" . Minor Planet Center . Retrieved 21 September 2017 .^ a b c d Duffard, R.; Pinilla-Alonso, N.; Santos-Sanz, P.; Vilenius, E.; Ortiz, J. L.; Mueller, T.; et al. (April 2014). "Astronomy and Astrophysics . 564 : 17. arXiv :1309.0946 Bibcode :2014A&A...564A..92D . doi :10.1051/0004-6361/201322377 . S2CID 119177446 . ^ a b c Bauer, James M.; Grav, Tommy; Blauvelt, Erin; Mainzer, A. K.; Masiero, Joseph R.; Stevenson, Rachel; et al. (August 2013). "Centaurs and Scattered Disk Objects in the Thermal Infrared: Analysis of WISE/NEOWISE Observations". The Astrophysical Journal . 773 (1): 11. arXiv :1306.1862 Bibcode :2013ApJ...773...22B . doi :10.1088/0004-637X/773/1/22 . S2CID 51139703 . ^ a b c Gutiérrez, P. J.; Ortiz, J. L.; Alexandrino, E.; Roos-Serote, M.; Doressoundiram, A. (June 2001). "Short term variability of Centaur 1999 UG5" . Astronomy and Astrophysics . 371 : L1 – L4 . Bibcode :2001A&A...371L...1G . doi :10.1051/0004-6361:20010418 ^ a b c Bauer, James M.; Meech, Karen J.; Fernández, Yanga R.; Farnham, Tony L.; Roush, Ted L. (December 2002). "Observations of the Centaur 1999 UG5: Evidence of a Unique Outer Solar System Surface" . The Publications of the Astronomical Society of the Pacific . 114 (802): 1309– 1321. Bibcode :2002PASP..114.1309B . doi :10.1086/344586 ^ Lowry, Stephen C.; Weissman, Paul R. (May 2007). "Rotation and color properties of the nucleus of Comet 2P/Encke". Icarus . 188 (1): 212– 223. arXiv :astro-ph/0612380 Bibcode :2007Icar..188..212L . doi :10.1016/j.icarus.2006.11.014 . S2CID 119024049 . ^ a b Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited" . Astronomy and Astrophysics . 546 : 20. arXiv :1209.1896 Bibcode :2012A&A...546A.115H . doi :10.1051/0004-6361/201219566 . S2CID 54776793 . Retrieved 26 September 2019 . ^ Peixinho, N.; Delsanti, A.; Guilbert-Lepoutre, A.; Gafeira, R.; Lacerda, P. (October 2012). "The bimodal colors of Centaurs and small Kuiper belt objects" . Astronomy and Astrophysics . 546 : 12. arXiv :1206.3153 Bibcode :2012A&A...546A..86P . doi :10.1051/0004-6361/201219057 . S2CID 55876118 . Retrieved 21 September 2017 . ^ Romanishin, W.; Tegler, S. C. (December 2005). "Accurate absolute magnitudes for Kuiper belt objects and Centaurs" . Icarus . 179 (2): 523– 526. Bibcode :2005Icar..179..523R . doi :10.1016/j.icarus.2005.06.016 . Retrieved 21 September 2017 . ^ Peixinho, N.; Lacerda, P.; Ortiz, J. L.; Doressoundiram, A.; Roos-Serote, M.; Gutiérrez, P. J. (May 2001). "Photometric study of Centaurs 10199 Chariklo (1997 CU26) and 1999 UG5" . Astronomy and Astrophysics . 371 (2): 753– 759. Bibcode :2001A&A...371..753P . doi :10.1051/0004-6361:20010382 ^ "MPC/MPO/MPS Archive" . Minor Planet Center . Retrieved 21 September 2017 .
External links
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