1682 Karel

Stony asteroid October 2019 yes 1682 Karel #D6D6D6 1682Karel (Lightcurve Inversion).png Lightcurve-based 3D-model of Karel padding: 5px 0; line-height: 1.3em; 2 August 1949 K. Reinmuth Heidelberg Obs. (1682) Karel 1949 PH1929 SD1939 RK1946 WC1949 QQ1949 QX 11949 SL1959 PH1988 CR 3 Karel van Houten(son of astronomers)Cornelis and Ingrid main-beltFlora 4 September 2017 (JD 2458000.5) 0 87.39 yr (31,918 days) 2.6685 AU 1.8085 AU 2.2385 AU 0.1921 3.35 yr (1,223 days) 106.49° 0.2943 ms / day 4.0276° 325.78° 9.9066° 4.80 0.55 km7.267 0.195 km7.47 km (calculated) 3.37485 0.00003 h3.37485 0.00005 h 0.24 (assumed)0.278 0.0270.531 0.124 S 12.7012.812.82 0.3212.90 1682 Karel, provisional designation 1949 PH, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 2 August 1949, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and later named after the son of Dutch astronomer couple Ingrid and Cornelis van Houten. Orbit and classification Karel is a member of the Flora family, one of the largest collisional populations of stony asteroids in the inner main-belt. It orbits the Sun at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,223 days). Its orbit has an eccentricity of 0.19 and an inclination of 4° with respect to the ecliptic. In 1929, Karel was first identified as 1929 SD at Heidelberg, extending the body's observation arc by 20 years prior to its official discovery observation. Physical characteristics Rotation period Astronomers François Colas, Jean Lecacheux, Federico Manzini and Raoul Behrend obtained a rotational lightcurve of Karel from photometric observations in January 2008. It gave a well-defined rotation period of 3.37485 hours with a brightness variation of 0.47 in magnitude (U=3). An identical period was modeled from the Lowell Photometric Database (U=n.a.). Diameter and albedo According to the survey carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Karel measures 4.80 and 7.27 kilometers in diameter, and its surface has an albedo of 0.278 and 0.531, respectively. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this family – and calculates a diameter of 7.47 kilometers based on an absolute magnitude of 12.8. Naming This minor planet was named after Karel van Houten, son of Dutch astronomers Ingrid and Cornelis van Houten of the Leiden Observatory. Together with Ingrid, Reinmuth discovered the minor planet 1691 Oort in 1956. Reinmuth also named his two discoveries, 1673 van Houten and 1674 Groeneveld, after the prolific couple of Dutch astronomers. The official 1682 naming citation was published by the Minor Planet Center on 15 December 1968 (M.P.C. 2901). References 2017-02-15 last obs. JPL Small-Body Database Browser: 1682 Karel (1949 PH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001682 Jet Propulsion Laboratory 6 June 2017 Dictionary of Minor Planet Names – (1682) Karel Schmadel Lutz D. Springer Berlin Heidelberg 134 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1683 (1682) Karel Dictionary of Minor Planet Names – (1674) Groeneveld Schmadel Lutz D. Springer Berlin Heidelberg 133 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1675 (1674) Groeneveld Dictionary of Minor Planet Names – (1673) van Houten Schmadel Lutz D. Springer Berlin Heidelberg 133 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1674 (1673) van Houten 1682 Karel (1949 PH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1682 22 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 Asteroids and comets rotation curves – (1682) Karel Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001682 22 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001682 dead 1682 22 December 2016 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 free (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 22 December 2016 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 22 December 2016 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 22 December 2016 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1682 1681 Steinmetz 1682 1683 Castafiore 001682 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19490802