10252 Heidigraf

Koronian asteroid from the outer regions of the asteroid belt May 2018 yes 10252 Heidigraf #D6D6D6 C. J. van HoutenI. van Houten-G.T. Gehrels Palomar Obs. 26 March 1971 (10252) Heidigraf 4164 T-11978 VX 15 Heidi Graf(ESA manager) main-belt(outer)Koronis 23 March 2018 (JD 2458200.5) 0 46.83 yr (17,106 d) 3.0525 AU 2.6524 AU 2.8524 AU 0.0701 4.82 yr (1,760 d) 138.89° 0.2046 ms / day 2.2591° 33.300° 289.53° 5.15 km (calculated)5.782 0.203 km 0.24 (assumed)0.331 0.0570.4007 0.1010 S (assumed) 12.813.160 0.190 (R)13.213.61 10252 Heidigraf, provisional designation 4164 T-1, is a Koronian asteroid from the outer regions of the asteroid belt, approximately 6 km mi off 2 us in diameter. It was discovered during the Palomar–Leiden Trojan survey on 26 March 1971, by Ingrid and Cornelis van Houten at Leiden, and Tom Gehrels at Palomar Observatory in California, United States. The likely elongated S-type asteroid has a brightness variation of 0.56 magnitude. It was named after Heidi Graf, a former Head of the ESTEC Communications Office. Orbit and classification Heidigraf is a core member of the Koronis family (605), a very large outer asteroid family of six thousand known members with nearly co-planar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.1 AU once every 4 years and 10 months (1,760 days; semi-major axis of 2.85 AU). Its orbit has an eccentricity of 0.07 and an inclination of 2° with respect to the ecliptic. The body's observation arc begins at Palomar on 24 March 1971, two nights prior to its official discovery observation. Palomar–Leiden Trojan survey The survey designation "T-1" stands for the first Palomar–Leiden Trojan survey, named after the fruitful collaboration of the Palomar and Leiden Observatory in the 1960s and 1970s. 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 Heidigraf is an assumed stony S-type asteroid, which is the overall spectral type of the Koronis family.23 Rotation period In January 2014, astronomers at the Palomar Transient Factory observed Heidigraf photometrically in the R-band during which it showed a brightness amplitude of 0.56 magnitude, indicative for a non-spheroidal shape. However no rotational lightcurve could be constructed and its rotation period remains unknown. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Heidigraf measures 5.782 kilometers in diameter and its surface has an albedo of 0.331 and 0.4007, respectively. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and calculates a diameter of 5.15 kilometers based on an absolute magnitude of 13.61. Naming This minor planet was named after Heidi Graf (born 1941), former Head of the European Space Research and Technology Centre (ESTEC) Communications Office from 1977 to 2006 at the European Space Agency, ESA. The official naming citation was published by the Minor Planet Center on 9 November 2006 (M.P.C. 57950). References 30em 2018-01-22 last obs. JPL Small-Body Database Browser: 10252 Heidigraf (4164 T-1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010252 Jet Propulsion Laboratory 1 May 2018 10252 Heidigraf (4164 T-1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=10252 1 May 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 1 May 2018 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 Minor Planet Discoverers Minor Planet Center https://www.minorplanetcenter.net/iau/lists/MPDiscsNum.html 2018 1 May 2018 Asteroid 10252 Heidigraf – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=10252+Heidigraf#Asteroid%2010252%20HeidigrafEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 27 October 2019 https://web.archive.org/web/20200819064234/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=10252+Heidigraf#Asteroid%2010252%20HeidigrafEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 19 August 2020 dead D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 9780816532131 10252 1 May 2018 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 6 Chan-Kao Chang Wing-Huen Ip Ip Wing-huen Hsing-Wen Lin Yu-Chi Cheng Chow-Choong Ngeow Ting-Chang Yang Adam Waszczak Shrinivas R. Kulkarni David Levitan Branimir Sesar Russ Laher Jason Surace Thomas. A. Prince August 2015 Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory The Astrophysical Journal Supplement Series 219 2 19 2015ApJS..219...27C 10.1088/0067-0049/219/2/27 1506.08493 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 10252 10251 Mulisch 10252 10253 Westerwald 010252 Category:Discoveries by Cornelis Johannes van Houten Category:Discoveries by Ingrid van Houten-Groeneveld Category:Discoveries by Tom Gehrels 4164 Category:Named minor planets 19710326