1162 Larissa

Hildian asteroid Neptune's moon Larissa (moon) October 2019 yes 1162 Larissa #D6D6D6 K. Reinmuth Heidelberg Obs. 5 January 1930 (1162) Larissa 1930 AC1948 KJ l @ ' r I s @Noah Webster (1884) A Practical Dictionary of the English Language Larissa (Greek city) main-belt(outer)Hilda 4 September 2017 (JD 2458000.5) 0 87.50 yr (31,958 days) 4.3705 AU 3.5082 AU 3.9393 AU 0.1095 7.82 yr (2,856 days) 315.27° 0.1261 ms / day 1.8856° 39.808° 209.55° 0.6683 AU 41.3 0.9 km42.243 0.111 km44.32 km (derived)48.59 1.50 km 6.514 0.003 hCS3-lightcurve-plot6.516 0.002 h 6.520 0.0021 h13.0 h (dated) 0.1153 (derived)0.127 0.0090.169 0.0120.18 0.03 Tholen PMB–V 0.761U–B 0.226 9.314 0.001 (R)9.409.42 0.439.449.73 1162 Larissa, provisional designation 1930 AC, is a metallic Hildian asteroid from the outermost regions of the asteroid belt, approximately 43 kilometers in diameter. It was discovered on 5 January 1930, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was named after the Greek city of Larissa. Orbit and classification Larissa belongs to the Hilda group located outermost part of the main-belt. Asteroids in this dynamical group have semi-major axis between 3.7 and 4.2 AU and stay in a 3:2 resonance with the gas giant Jupiter. Larissa, however, is a background asteroid and not a member of the (collisional) Hilda family (101). The asteroid orbits the Sun at a distance of 3.5–4.4 AU once every 7 years and 10 months (2,856 days). Its orbit has an eccentricity of 0.11 and an inclination of 2° with respect to the ecliptic. The body's observation arc begins 15 days after its official discovery observation at Heidelberg. Physical characteristics Larissa has been characterized as a metallic M-type asteroid by the Wide-field Infrared Survey Explorer (WISE). In the Tholen classification, the asteroid a primitive P-type asteroid, which typically have lower albedos than those measured by WISE and Akari (see below). Rotation period In April 2017, a rotational lightcurve of Larissa was obtained from photometric observations by American astronomers Brian Warner and Robert Stephens at the Center for Solar System Studies (U81/U82) in California. Lightcurve analysis gave a well-defined rotation period of 6.514 hours with a brightness variation of 0.12 magnitude (U=3).CS3-lightcurve-plot In May 2010, a lightcurve form the Oakley Southern Sky Observatory (E09) in Australia, gave a concurring period of 6.516 hours with an amplitude of 0.20 magnitude (U=3). Another period of 6.520 hours (Δ0.12 mag) was measured at the Palomar Transient Factory in October 2012 (U=2). The first photometric observation of Larissa, which gave a period of 13.0 hours, is now considered incorrect (U=1). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Larissa measures between 41.3 and 48.59 kilometers in diameter and its surface has an albedo between 0.127 and 0.18. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1153 and a diameter of 44.32 kilometers based on an absolute magnitude of 9.73. Naming This minor planet was named for the city of Larissa, capital of the Thessaly region in Greece, after which the asteroid 1161 Thessalia was named. The name was also given to Larissa (Neptune VII), one of the moons of Neptune. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108). Notes CS3-lightcurve-plot Lightcurve plot of (1162) Larissa, by Stephens and Warner (2017), Center for Solar System Studies (CS3) References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 1162 Larissa (1930 AC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001162 Jet Propulsion Laboratory 7 September 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 98 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1163 (1162) Larissa 1162 Larissa (1930 AC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1162 7 September 2017 Asteroid 1162 Larissa – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1162 28 October 2019 1162 7 September 2017 6 T. Grav A. K. Mainzer J. Bauer J. Masiero T. Spahr R. S. McMillan R. Walker R. Cutri E. Wright P. R. Eisenhardt E. Blauvelt E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand A. Wilkins January 2012 WISE/NEOWISE Observations of the Hilda Population: Preliminary Results https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...744..197G The Astrophysical Journal 744 2 15 2012ApJ...744..197G 10.1088/0004-637X/744/2/197 1110.0283 44000310 7 September 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 M. Dahlgren J. F. Lahulla C.-I. Lagerkvist J. Lagerros S. Mottola A. Erikson M. Gonano-Beurer M. Di Martino June 1998 A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..133..247D Icarus 133 2 247–285 1998Icar..133..247D 10.1006/icar.1998.5919 7 September 2017 Zachary Pligge Adam Monnier John Pharo Kellen Stolze Arnold Yim Richard Ditteon January 2011 Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2010 May https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38....5P The Minor Planet Bulletin 38 1 5–7 1052-8091 2011MPBu...38....5P 7 September 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 https://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 7 September 2017 Brian D. Warner Robert D. Stephens July 2017 Lightcurve Analysis of Hilda Asteroids at the Center for Solar System Studies: 2016 December thru 2017 April https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..220W The Minor Planet Bulletin 44 3 220–222 32455402 7243934 1052-8091 2017MPBu...44..220W 7 September 2017 Richard P. Binzel Linda M. Sauter February 1992 Trojan, Hilda, and Cybele asteroids - New lightcurve observations and analysis https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1992Icar...95..222B Icarus 95 2 222–238 0019-1035 1992Icar...95..222B 10.1016/0019-1035(92)90039-A 7 September 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 https://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 7 September 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 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1162 1161 Thessalia 1162 1163 Saga 001162 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001162 19300105