1271 Isergina

Asteroid October 2019 yes 1271 Isergina #D6D6D6 G. Neujmin Simeiz Obs. 10 October 1931 (1271) Isergina 1931 TN1930 MK1932 CK 12003 RV 22A906 HD Pyotr Vasilyevich Isergin(Crimean physician) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 111.22 yr (40,622 days) 3.5228 AU 2.7708 AU 3.1468 AU 0.1195 5.58 yr (2,039 days) 160.82° 0.1766 ms / day 6.6687° 127.22° 269.37° 39.58 12.78 km42.32 14.32 km44.47 km (derived)47.52 0.38 km47.524 0.383 km50.897 0.464 km52.15 0.76 km 7.59932 0.00009 h7.829 0.002 h9.864 0.004 h 0.031 0.0030.038 0.0010.0392 0.01020.06 0.060.065 0.0090.0677 (derived)0.08 0.08 SMASS CX/L 10.2010.3010.39 0.2010.410.4210.60 1271 Isergina, provisional designation 1931 TN, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 45 kilometers in diameter. It was discovered on 10 October 1931, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Crimean physician and friend of the discoverer, Pyotr Isergin. Orbit and classification Isergina is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.8–3.5 AU once every 5 years and 7 months (2,039 days; semi-major axis of 3.15 AU). Its orbit has an eccentricity of 0.12 and an inclination of 7° with respect to the ecliptic. The asteroid was first identified as A906 HD at Heidelberg Observatory in April 1906. The body's observation arc begins at Simeiz with its official discovery observation in 1931. Physical characteristics In the SMASS classification, Isergina is a carbonaceous C-type asteroid. It has also been characterized as both an X- and L-type by Pan-STARRS photometric survey. Rotation period During 2016–2017, three rotational lightcurves of Isergina were obtained from photometric observations (U=3-/3-/2+). Lightcurve analysis of the adopted result gave a rotation period of 7.59932 hours with a brightness amplitude between 0.25 and 0.36 magnitude (U=3-). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Isergina measures between 39.58 and 52.15 kilometers in diameter and its surface has an albedo between 0.031 and 0.08. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0677 and a diameter of 44.47 kilometers based on an absolute magnitude of 10.3. Naming This minor planet was named after Crimean physician Pyotr Vasilyevich Isergin (1870–1936), a friend of the discoverer who was treated by him. The author of the Dictionary of Minor Planet Names learned about the naming circumstances from Crimean astronomers I. I. Neyachenko and Galina Kastelʹ (see 3982 Kastelʹ). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 117). References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 1271 Isergina (1931 TN) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001271 Jet Propulsion Laboratory 5 December 2017 Dictionary of Minor Planet Names – (1271) Isergina Schmadel Lutz D. Springer Berlin Heidelberg 105 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1272 (1271) Isergina 1271 Isergina (1931 TN) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1271 5 December 2017 Asteroids and comets rotation curves – (1271) Isergina Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001271 5 December 2017 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001271 dead 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 Asteroid 1271 Isergina – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1271 29 October 2019 1271 5 December 2017 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 5 December 2017 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 (online, AcuA catalog p. 153) 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 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 46350317 5 December 2017 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 35447010 Benishek, Vladimir October 2016 Lightcurves and Rotation Periods for 14 Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..339B The Minor Planet Bulletin 43 4 339–342 1052-8091 2016MPBu...43..339B 5 December 2017 6 Amadeo Aznar Macias Alfonso Carreno Garcerain Enrique Arce Masego Pedro Brines Rodriguez Juan Lozano de Haro Alvaro Fornas Silva Gonzalo Fornas Silva Vicente Mas Martinez Onofre Rodrigo Chiner David Herrero Porta July 2016 Twenty-one Asteroid Lightcurves at Group Observadores de Asteroides (OBAS): Late 2015 to Early 2016 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..257A The Minor Planet Bulletin 43 3 257–263 1052-8091 2016MPBu...43..257A 5 December 2017 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 53493339 5 December 2017 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 Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1271 1270 Datura 1271 1272 Gefion 001271 Category:Discoveries by Grigory Neujmin Category:Named minor planets 001271 19311010