10249 Harz

Main-belt asteroid May 2018 yes 10249 Harz #D6D6D6 C. J. van HoutenI. van Houten-G.T. Gehrels Palomar Obs. 17 October 1960 (10249) Harz 9515 P-L1985 TY Harz(German mountain range) main-belt(middle)background 23 March 2018 (JD 2458200.5) 0 55.64 yr (20,323 d) 2.8174 AU 2.3354 AU 2.5764 AU 0.0935 4.14 yr (1,510 d) 291.52° 0.2383 ms / day 3.6347° 51.878° 342.89° 3.15 km (calculated)3.59 0.26 km 3.631 0.0006 h3.64 0.01 h 0.20 (assumed)0.261 0.070 S (assumed) 14.3014.414.41 0.17 (R)14.426 0.003 (R)14.82 0.2514.88 10249 Harz, provisional designation 9515 P-L, is a background asteroid from the central regions of the asteroid belt, approximately 3.5 km mi off 2 us in diameter. It was discovered on 17 October 1960, by Ingrid and Cornelis van Houten at Leiden, and Tom Gehrels at Palomar Observatory in California, United States. The assumed S-type asteroid is likely elongated and has a short rotation period of 3.63 hours. It was named after the German mountain range Harz. Orbit and classification Harz is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.3–2.8 AU once every 4 years and 2 months (1,510 days; semi-major axis of 2.58 AU). Its orbit has an eccentricity of 0.09 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Palomar in October 1960. Palomar–Leiden survey The survey designation "P-L" stands for Palomar–Leiden, named after Palomar Observatory and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis van Houten at Leiden Observatory where astrometry was carried out. The trio are credited with the discovery of several thousand asteroid discoveries. Physical characteristics Harz is an assumed S-type asteroid, which agrees with the measured albedo (see below) by the Wide-field Infrared Survey Explorer (WISE). Rotation period In October 2010, and December 2014, two rotational lightcurves of Harz were obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.631 and 3.64 hours with a brightness amplitude of 0.47 and 0.52 magnitude, respectively, indicating that the body has an elongated shape (U=2/2). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's WISE telescope, Harz measures between 3.59 kilometers in diameter and its surface has an albedo of 0.26, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.15 kilometers based on an absolute magnitude of 14.88. Naming This minor planet was named after the Harz mountains, an old German mountain range where silver was mined until the last century. Legend has it that the witches gathered on their broomsticks on a plateau in the Harz mountains on the first day of May. The legendary place where the witches danced is known as Hexentanzplatz. The official naming citation was published by the Minor Planet Center on 1 May 2003 (M.P.C. 48390). References 30em 2016-06-08 last obs. JPL Small-Body Database Browser: 10249 Harz (9515 P-L) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010249 Jet Propulsion Laboratory 1 May 2018 10249 Harz (9515 P-L) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=10249 1 May 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 1 May 2018 Asteroid 10249 Harz – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=10249 29 October 2019 Minor Planet Discoverers Minor Planet Center https://www.minorplanetcenter.net/iau/lists/MPDiscsNum.html 2018 1 May 2018 10249 1 May 2018 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 The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 46350317 6 Chan-Kao Chang Hsing-Wen Lin Wing-Huen Ip Ip Wing-huen Thomas A. Prince Shrinivas R. Kulkarni David Levitan Russ Laher Jason Surace December 2016 Large Super-fast Rotator Hunting Using the Intermediate Palomar Transient Factory The Astrophysical Journal Supplement Series 227 2 13 2016ApJS..227...20C 10.3847/0067-0049/227/2/20 1608.07910 free 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 The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 8342929 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 Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 53493339 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 Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center 10249 10248 Fichtelgebirge 10249 10250 Hellahaasse 010249 Category:Discoveries by Cornelis Johannes van Houten Category:Discoveries by Ingrid van Houten-Groeneveld Category:Discoveries by Tom Gehrels 9515 Category:Named minor planets 19601017