1382 Gerti

Asteroid October 2019 yes 1382 Gerti #D6D6D6 File:1382Gerti (Lightcurve Inversion).png Lightcurve-based 3D-model of Gerti K. Reinmuth Heidelberg Obs. 21 January 1925 (1382) Gerti 1925 BB1929 LH1933 UL 11936 QB 1 Gertrud Höhne(ARI secretary) main-belt(inner)Florabackground 4 September 2017 (JD 2458000.5) 0 92.18 yr (33,670 days) 2.5119 AU 1.9274 AU 2.2196 AU 0.1317 3.31 yr (1,208 days) 258.61° 0.2980 ms / day 1.5621° 353.04° 246.96° 8.54 km (derived)9.14 0.95 km9.75 1.68 km11.94 0.19 km 3.0 0.2 h3.081545 0.000005 h3.082 0.0004 h3.082 0.002 h 0.196 0.0240.24 (assumed)0.278 0.0590.28 0.08 S (assumed) 11.765 0.000 (R)12.0012.04 0.2812.2012.2712.5112.51 0.01 1382 Gerti, provisional designation 1925 BB, is a Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 21 January 1925, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after a secretary of the Astronomical Calculation Institute, Gertrud Höhne. Orbit and classification Gerti has been dynamically classified as a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt. It is, however, a non-family asteroid of the main belt's background population when applying the Hierarchical Clustering Method to its proper orbital elements (both by Nesvorný as well as by Novakovic, Knežević and Milani). It orbits the Sun in the inner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,208 days). Its orbit has an eccentricity of 0.13 and an inclination of 2° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Heidelberg in January 1925. Physical characteristics The LCDB assumes it to be a stony S-type asteroid, due to its dynamical classification as a member of the Flora family (402). Rotation period Two rotational lightcurve of Gerti were obtained from photometric observations by Wiesław Wiśniewski in February 1988, and by astronomers at the Palomar Transient Factory in January 2011, respectively. Lightcurve analysis gave an identical rotation period of 3.082 hours with a respective brightness amplitude of 0.20 and 0.29 magnitude (U=3/2). A third lightcurve by René Roy in March 2008 gave a period of 3.0 hours with an amplitude of 0.36 magnitude (U=2). Poles In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue and other sources gave a concurring sidereal period of 3.081545 hours, as well as two spin axis of (268.0°, 23.0°) and (87.0°, 28.0°) in ecliptic coordinates (λ, β). 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, Gerti measures between 9.14 and 11.94 kilometers in diameter and its surface has an albedo between 0.196 and 0.28. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – taken from 8 Flora, the Flora family's parent body – and derives a diameter of 8.54 kilometers based on an absolute magnitude of 12.51. Naming This minor planet was named after Gertrud Höhne who was a secretary at the Berlin Astronomical Calculation Institute (de Astronomisches Rechen-Institut. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 125). References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 1382 Gerti (1925 BB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001382 https://web.archive.org/web/20200918061812/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001382 dead 18 September 2020 Jet Propulsion Laboratory 27 October 2017 Dictionary of Minor Planet Names – (1382) Gerti Schmadel Lutz D. Springer Berlin Heidelberg 112 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1383 (1382) Gerti 1382 Gerti (1925 BB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1382 27 October 2017 Asteroids and comets rotation curves – (1382) Gerti Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001382 27 October 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001382 dead Asteroid 1382 Gerti – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1382 29 October 2019 1382 27 October 2017 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 27 October 2017 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 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) 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 27 October 2017 6 Hanus, J. Durech, J. Broz, M. Warner, B. D. Pilcher, F. Stephens, R. Oey, J. Bernasconi, L. Casulli, S. Behrend, R. Polishook, D. Henych, T. Lehký, M. Yoshida, F. Ito, T. June 2011 A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011A&A...530A.134H Astronomy & Astrophysics 530 16 2011A&A...530A.134H 10.1051/0004-6361/201116738 1104.4114 27 October 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 27 October 2017 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 27 October 2017 11104/0217021 free 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 27 October 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 1382 1381 Danubia 1382 1383 Limburgia 001382 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19250121