(7335) 1989 JA

Near-Earth asteroid in 2022 September 2020 yes (7335) 1989 JA #FFC2E0 1989JA Goldstone radar May26.gif Radar images of 1989 JA and its satellite, imaged by the Goldstone observatory in May 2022 1 May 1989 E. F. Helin Palomar Obs. (7335) 1989 JA ApolloNEOPHA 4 September 2017 (JD 2458000.5) 0 27.98 yr (10,221 days) 2.6277 AU 0.9136 AU 1.7706 AU 0.4840 2.36 yr (861 days) 341.87° 0.4183 ms / day 15.196° 61.325° 232.24° 0.0225 AU8.8 LD 0.932 0.153 km1.18 km (calculated)1.8 km (outdated) <12 h 0.20 (assumed)0.31 0.300.322 0.150 S 17.017.8 0.3 (7335) 1989 JA is a stony asteroid of the Apollo group, classified as a near-Earth object and potentially hazardous asteroid, approximately 1 kilometer in diameter. It was discovered on 1 May 1989, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California. On 27 May 2022, the asteroid made a close approach 0.027 AU e6km e6mi in from Earth. During the close approach, optical observations detected signs of an orbiting satellite, which was later confirmed by radar imaging at NASA's Goldstone Solar System Radar in California. +2022 close approach Date JPL SBDBnominal geocentricdistance uncertaintyregion(3-sigma)2022-05-27 4024703 km ± 153 km Orbit and classification The S-type asteroid orbits the Sun at a distance of 0.9–2.6 AU once every 2 years and 4 months (861 days). Its orbit has an eccentricity of 0.48 and an inclination of 15° with respect to the ecliptic. The first observation was made at the discovering observatory in April 1989, extending the asteroid's observation arc by 1 month prior to its discovery observation. It has a minimum orbital intersection distance to Earth of 0.0225 AU km on off 3 which corresponds to 8.8 lunar distances. Physical characteristics During its discovery in May 1989, radiometric observations for this asteroid at Arecibo and Goldstone Observatory rendered a rotation period of less than 12 hours (U=n.a.). According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 0.93 kilometers in diameter and its surface has a high albedo of 0.31–0.32, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 1.18 kilometers, based on an absolute magnitude of 17.0. Naming As of 2022, 1989 JA remains unnamed. References 2017-03-31 last obs. JPL Small-Body Database Browser: 7335 (1989 JA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007335 Jet Propulsion Laboratory 26 May 2017 7335 (1989 JA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=7335 26 September 2016 7335 26 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 6 Pravas R. Mahapatra Lance A. M. Benner Steven J. Ostro Raymond F. Jurgens Jon D. Giorgini Donald K. Yeomans John F. Chandler Irwin I. Shapiro March 2002 Radar observations of asteroid 7335 (1989 JA) http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002P&SS...50..257M Planetary and Space Science 50 3 257–260 2002P&SS...50..257M 10.1016/S0032-0633(02)00002-8 26 September 2016 W. Z. Wisniewski T. M. Michalowski A. W. Harris R. S. McMillan March 1995 Photoelectric Observations of 125 Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995LPI....26.1511W Abstracts of the Lunar and Planetary Science Conference 26 1511 1995LPI....26.1511W 26 September 2016 6 A. Mainzer T. Grav J. Masiero J. Bauer E. Wright R. M. Cutri R. S. McMillan M. Cohen M. Ressler P. Eisenhardt August 2011 Thermal Model Calibration for Minor Planets Observed with Wide-field Infrared Survey Explorer/NEOWISE http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...736..100M The Astrophysical Journal 736 2 9 2011ApJ...736..100M 10.1088/0004-637X/736/2/100 26 September 2016 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...743..156M The Astrophysical Journal 743 2 17 2011ApJ...743..156M 10.1088/0004-637X/743/2/156 26 September 2016 1109.6400 Goldstone Radar Observations Planning: (7335) 1989 JA, 388945 2008 TZ3, and 467460 2006 JF42 https://echo.jpl.nasa.gov/asteroids/1989JA/1989JA.2022.goldstone.planning.html Lance A. M. Benner Asteroid Radar Research Jet Propulsion Laboratory 15 June 2022 External links 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 7335 7335 1989JA 2007335 7334 Sciurus 7335 7336 Saunders 007335 Category:Discoveries by Eleanor F. Helin 007335 19890501 007335 007335