(8201) 1994 AH2

Near-Earth asteroid October 2019 yes (8201) 1994 AH 2 #FFC2E0 5 January 1994 G. J. Garradd Siding Spring Obs. (8201) 1994 AH 2 ApolloNEOAlinda group 4 September 2017 (JD 2458000.5) 0 34.86 yr (12,731 days) 4.3322 AU 0.7436 AU 2.5379 AU 0.7070 4.04 yr (1,477 days) 285.46° 0.2438 ms / day 9.5538° 164.12° 25.120° 0.1012 AU39.4 LD 0.6611 AU 1.859 0.183 km2.17 km (calculated)2.2 km 23.949 h24 hlcdb-Pravec-1998 0.15 (estimated)0.154 0.0420.18 (assumed) SMASSOO 15.816.3 (8201) 1994 AH 2 is a highly eccentric, rare-type asteroid, classified as a near-Earth object of the Apollo group of asteroids, approximately 2 kilometers in diameter. It was discovered on 5 January 1994, by Australian amateur astronomer Gordon Garradd during the AANEAS survey at the Siding Spring Observatory, Australia. It has an Earth minimum orbit intersection distance of 0.1 AU e6km unit on and is associated with the Beta Taurids daytime meteor shower. Orbit and classification The asteroid orbits the Sun at a distance of 0.7–4.3 AU once every 4.04 years (1,477 days). Its orbit has an eccentricity of 0.71 and an inclination of 10° with respect to the ecliptic. It is a member of the Alinda group of asteroids with a 3:1 resonance with Jupiter that has excited the eccentricity of the orbit over the eons. As an Alinda asteroid it makes approaches to Jupiter, Earth, and Venus. 1994 AH 2 has an Earth minimum orbital intersection distance of 0.1012 AU km on off 3, which corresponds to 39.4 lunar distances. Due to its elongated orbit, it also approaches the orbit of Jupiter within 0.1022 AU km on off 3. On 4 January 2079, it will pass 0.3595 AU km on on 3 from the Earth. A first precovery was taken at the discovering observatory in 1981, extending the asteroid's observation arc by 13 years prior to its discovery. Physical characteristics In the SMASS classification, 1994 AH 2 is characterized as a rare O-type asteroid. Rotation period In the late 1990s, Czech astronomer Petr Pravec obtained two rotational lightcurves for this asteroid from photometric observations taken at the Ondřejov Observatory, Czech Republic. They gave a longer-than average rotation period of 23.949 and 24 hours with a brightness variation of 0.27 and 0.3 magnitude, respectively (U=2/n.a.).lcdb-Pravec-1998 Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 1.86 kilometers in diameter and its surface has an albedo of 0.154. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.18 and calculates a diameter of 2.17 kilometers, based on an absolute magnitude of 15.8. American astronomer Richard Binzel gives a diameter of 2.2 kilometers. Naming As of 2017, 1994 AH 2 remains unnamed. Notes lcdb-Pravec-1998 Pravec (1998) web: Observation from 15 July 1998. Rotation period 24 hours with a brightness amplitude of 0.3 mag. No quality rating available. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (8201) and Pravec, P.; Wolf, M.; Sarounova, L. (1998) References 30em 2016-10-24 last obs. JPL Small-Body Database Browser: 8201 (1994 AH2) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2008201;cad=1 Jet Propulsion Laboratory 26 May 2017 8201 (1994 AH2) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=8201 1 September 2016 2016-08-27 last obs. JPL Close-Approach Data: 8201 (1994 AH2) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=8201;cad=1#cad Jet Propulsion Laboratory 1 September 2016 R. P. Binzel D. Lupishko M. di Martino R. J. Whiteley G. J. Hahn March 2002 Physical Properties of Near-Earth Objects http://www.lpi.usra.edu/books/AsteroidsIII/pdf/3048.pdf Asteroids III 255–271 10.2307/j.ctv1v7zdn4.24 2002aste.book..255B 1 September 2016 8201 1 September 2016 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 Petr Pravec Lenka Sarounová Marek Wolf December 1996 Lightcurves of 7 Near-Earth Asteroids Icarus 124 2 471–482 1996Icar..124..471P 10.1006/icar.1996.0223 6 A. Mainzer T. Grav J. Bauer J. Masiero R. S. McMillan R. M. Cutri R. Walker E. Wright P. Eisenhardt D. J. Tholen T. Spahr R. Jedicke L. Denneau E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand W. Mo J. Watkins A. Wilkins G. L. Bryngelson A. Del Pino Molina S. Desai M. Gómez Camus S. L. Hidalgo I. Konstantopoulos J. A. Larsen C. Maleszewski M. A. Malkan J.-C. Mauduit B. L. Mullan E. W. Olszewski J. Pforr A. Saro J. V. Scotti L. H. Wasserman December 2011 NEOWISE Observations of Near-Earth Objects: Preliminary Results The Astrophysical Journal 743 2 17 2011ApJ...743..156M 10.1088/0004-637X/743/2/156 1109.6400 Babadzhanov P. B. Search for meteor showers associated with Near-Earth Asteroids Astronomy and Astrophysics 373 1 329–335 2001 10.1051/0004-6361:20010583 2001A&A...373..329B free The Alinda Family of Asteroids John S Lewis 2015-08-03 http://www.johnslewis.com/2015/08/the-alinda-family-of-asteroids.html 2019-06-26 External links AANEAS: A Valedictory Report, AANEAS Discoveries 1990-96 Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend 8201 8201 1994AH2 8200 Souten 8201 (8201) 1994 AH 2 8202 Gooley 008201 008201 Category:Discoveries by Gordon J. Garradd 008201 19940105