1622 Chacornac

Inner belt asteroid October 2019 yes 1622 Chacornac #D6D6D6 15 March 1952 A. Schmitt Uccle Obs. (1622) Chacornac 1952 EA1932 DD1933 UX1939 KE1942 EB 11949 KF1952 DP 21953 TM 1 Jean Chacornac(astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 85.94 yr (31,388 days) 2.5989 AU 1.8705 AU 2.2347 AU 0.1630 3.34 yr (1,220 days) 146.41° 0.2950 ms / day 6.4607° 4.3644° 256.53° 8.43 0.32 km9.85 km (calculated)10.27 0.65 km 11.485 0.006 h12.2044 0.0041 h12.206 0.002 h12.2190 0.0116 h 0.224 0.0300.24 (assumed)0.360 0.042 S 11.954 0.001 (R)12.040 0.001 (R)12.04 1.2512.1012.2 1622 Chacornac (provisional designation 1952 EA) is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 15 March 1952, by French astronomer Alfred Schmitt at the Royal Observatory of Belgium in Uccle, and named after astronomer Jean Chacornac. Orbit and classification The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,220 days). Its orbit has an eccentricity of 0.16 and an inclination of 6° with respect to the ecliptic. The first precovery was taken at Lowell Observatory in 1930, extending Chacornac's observation arc by 22 years prior to its official discovery observation. Lightcurves Between 2009 and 2013, several rotational lightcurves for this asteroid were obtained from photometric observations at the Palomar Transient Factory and the Hunters Hill Observatory, as well as by astronomers Eric Barbotin and Raoul Behrend. Lightcurve analysis gave a rotation period between 11.48 and 12.20 hours with a brightness variation between 0.21 and 0.25 in magnitude (U=2/2/2). Diameter and albedo According to the survey carried out by the Japanese Akari satellite, Chacornac measures 10.3 kilometers in diameter and its surface has an albedo of 0.224, while observations by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission gave a diameter of 8.4 kilometers and a high albedo of 0.36. The Collaborative Asteroid Lightcurve Link agrees with the results obtained by AKARI and assumes an albedo of 0.24 – derived from 8 Flora, the family's largest member and namesake – and calculates a diameter of 9.9 kilometers with an absolute magnitude of 12.2. Naming This minor planet was named in memory of French astronomer Jean Chacornac (1823–1873), an early discoverer of minor planets himself, most notably 25 Phocaea. He also discovered the parabolic comet C/1852 K1 (Chacornac) in 1852 and independently discovered 20 Massalia. The lunar crater Chacornac also bears his name. The official 1622 naming citation was published by the Minor Planet Center on 1 August 1978 (M.P.C. 4418). References 2016-11-19 last obs. JPL Small-Body Database Browser: 1622 Chacornac (1952 EA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001622 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1622) Chacornac Schmadel Lutz D. Springer Berlin Heidelberg 129 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1623 (1622) Chacornac 1622 Chacornac (1952 EA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1622 1 August 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 Asteroids and comets rotation curves – (1622) Chacornac Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001622 1 August 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001622 dead 1622 1 August 2016 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 free (online, AcuA catalog p. 153) 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri C. Nugent M. S. Cabrera November 2012 Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 1 August 2016 David Higgins Brian D. Warner October 2009 Lightcurve Analysis at Hunters Hill Observatory and Collaborating Stations - Autumn 2009 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36..159H The Minor Planet Bulletin 36 4 159–160 1052-8091 2009MPBu...36..159H 1 August 2016 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1 August 2016 1504.04041 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 1 August 2016 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1622 1621 Druzhba 1622 1623 Vivian 001622 Category:Discoveries by Alfred Schmitt Category:Named minor planets 19520315