1337 Gerarda

Main-belt asteroid October 2019 yes 1337 Gerarda #D6D6D6 001337-asteroid shape model (1337) Gerarda.png Modelled shape of Gerarda from its lightcurve H. van Gent Johannesburg Obs. 9 September 1934 (1337) Gerarda 1934 RA 11942 EE 1 Gerarda Prins(wife of astronomer) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 83.06 yr (30,337 days) 3.1978 AU 2.6247 AU 2.9113 AU 0.0984 4.97 yr (1,814 days) 257.78° 0.1984 ms / day 17.979° 160.29° 201.86° 35.56 11.35 km38.84 km (derived)38.86 3.6 km40.875 0.305 km40.91 0.49 km41.53 0.48 km43.22 12.45 km46.464 0.379 km 12.462 0.0145 h12.52 h 0.0297 0.00420.03 0.020.034 0.0070.04 0.040.042 0.0010.0425 (derived)0.0441 0.010 PXC (assumed) 10.88 0.4510.970 0.001 (R)11.0611.1011.2011.29 1337 Gerarda, provisional designation 1934 RA 1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. The asteroid was named after Gerarda Prins, the wife of an orbit computer at Leiden Observatory. Orbit and classification Gerarda is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,814 days; semi-major axis of 2.91 AU). Its orbit has an eccentricity of 0.10 and an inclination of 18° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg. Physical characteristics Gerarda has been characterized as a dark and primitive P-type asteroid by the Wide-field Infrared Survey Explorer (WISE). It has also been classified as an X-type asteroid by Pan-STARRS photometric survey, while the Collaborative Asteroid Lightcurve Link (CALL) assumes it to be a carbonaceous C-type asteroid. Rotation period In November 1984, a first rotational lightcurve of Gerarda was obtained from photometric observations by American astronomer Richard Binzel. Lightcurve analysis gave a rotation period of 12.52 hours with a brightness variation of 0.23 magnitude (U=2). A similar period of 12.462 with an identical amplitude of 0.23 was measured by astronomers at the Palomar Transient Factory in June 2012 (U=2). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Gerarda measures between 35.56 and 46.464 kilometers in diameter and its surface has an albedo between 0.0297 and 0.0441. CALL derives an albedo of 0.0425 and a diameter of 38.84 kilometers based on an absolute magnitude of 11.10. Naming This minor planet was named by Dutch astronomer Gerrit Pels, who computed this asteroid's orbit. It was named after Gerarda Prins, the wife of G. Prins, an orbit computer at Leiden Observatory. The author of the Dictionary of Minor Planet Names, Lutz Schmadel, learned about the naming circumstances from Ingrid van Houten-Groeneveld, who was herself a long-time staff member at the Leiden Observatory. References 30em 2017-09-30 last obs. JPL Small-Body Database Browser: 1337 Gerarda (1934 RA1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001337 Jet Propulsion Laboratory 28 November 2017 Dictionary of Minor Planet Names – (1337) Gerarda Schmadel Lutz D. Springer Berlin Heidelberg 109 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1338 (1337) Gerarda 1337 Gerarda (1934 RA1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1337 28 November 2017 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 1337 Gerarda – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1337 29 October 2019 1337 28 November 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 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 28 November 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 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 E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 22 October 2019 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 28 November 2017 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 1504.04041 8342929 28 November 2017 Binzel, R. P. October 1987 A photoelectric survey of 130 asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B Icarus 72 1 135–208 0019-1035 1987Icar...72..135B 10.1016/0019-1035(87)90125-4 28 November 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 28 November 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 1337 1336 Zeelandia 1337 1338 Duponta 001337 Category:Discoveries by Hendrik van Gent Category:Named minor planets 19340909