1750 Eckert

Mars-crossing asteroid April 2018 yes 1750 Eckert #FA8072 001750-asteroid shape model (1750) Eckert.png Shape model of Eckert from its lightcurve 15 July 1950 K. Reinmuth Heidelberg Obs. (1750) Eckert 1950 NA 11950 OA Wallace Eckert(astronomer) Mars-crosserHungaria 4 September 2017 (JD 2458000.5) 0 66.89 yr (24,431 days) 2.2597 AU 1.5932 AU 1.9265 AU 0.1730 2.67 yr (977 days) 346.00° 19.084° 273.76° 109.00° 0.6934 AU 6.95 0.21 km6.97 km (calculated) 4.49 0.01 h (dated)375 5 h377.5 0.5 h 0.20 (assumed)0.203 0.013 B–V = 0.885U–B = 0.500Tholen = SS 13.1513.67 0.33 1750 Eckert, provisional designation 1950 NA 1, is a stony slow rotating Hungaria asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 15 July 1950, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after American astronomer Wallace Eckert. Classification and orbit The Mars crossing asteroid is also a member of the Hungaria family, a group that forms the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.6–2.3 AU once every 2 years and 8 months (977 days). Its orbit has an eccentricity of 0.17 and an inclination of 19° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, Eckerts observation arc begins with its official discovery observation. Rotation period In October 2009, a rotational lightcurve of Eckert was obtained by American astronomer Brian Warner at his Palmer Divide Observatory (716) in Colorado. It gave an exceptionally long rotation period of 375 hours with a brightness variation of 0.87 magnitude (U=3-). A modeled lightcurve obtained from the Lowell Photometric Database in 2016, gave a similar period of 377.5 hours (U=n.a.). Eckert has the sixth-longest rotation period of all known Mars-crossers. Diameter and albedo According to the survey carried out by the Japanese Akari satellite, the asteroid measures 6.95 kilometers in diameter, and its surface has an albedo of 0.203. The Collaborative Asteroid Lightcurve Link agrees with Akarai and assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 6.97 kilometers with an absolute magnitude of 13.15. Naming The minor planet was named in memory of American astronomer Wallace Eckert (1902–1971), director at the United States Naval Observatory from 1940 to 1945, president of IAU's Commission 7, and pioneer in the use of automatic computing machines. In the late 1940s and early 1950s, he used the then most powerful computing machines ever built, SSEC and NORC, for astronomical calculations. The asteroid 1625 The NORC was named after one of these early super-computers. Eckert also produced the integration of the orbits of the five outer planets in collaboration with Brouwer and Clemence, after whom the minor planets 1746 Brouwer and 1919 Clemence were named. By use of sophisticated computing techniques, Eckert was able to check and extend Brown's lunar theory (also see 1643 Brown). The official 1750 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3934). References 30em 2017-06-04 last obs. JPL Small-Body Database Browser: 1750 Eckert (1950 NA1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001750 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1750) Eckert Schmadel Lutz D. Springer Berlin Heidelberg 139 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1751 (1750) Eckert 1750 Eckert (1950 NA1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1750 20 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 JPL Small-Body Database Search Engine: orbital class (MCA) and rot_per > 0 (h) JPL Solar System Dynamics http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;ast_orbit_class=MCA;OBJ_field=0;ORB_field=0;c1_group=OBJ;c1_item=As;c1_op=%3E;c1_value=0;table_format=HTML;max_rows=50;format_option=comp;c_fields=AcBhBgBjBiBnBsAiAs;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=AsD 20 December 2015 1750 20 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 (online, AcuA catalog p. 153) Warner, Brian D. April 2010 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 September–December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...57W The Minor Planet Bulletin 37 2 57–64 1052-8091 2010MPBu...37...57W 20 December 2016 Dimitrij Bonzo Albino Carbognani July 2010 Lightcurves and Periods for Asteriods [sic] 1001 Gaussia, 1060 Magnolia, 1750 Eckert, 2888 Hodgson, and 3534 Sax http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...93B The Minor Planet Bulletin 37 3 93–95 1052-8091 2010MPBu...37...93B 20 December 2016 6 J. Hanus J. Durech D. A. Oszkiewicz R. Behrend B. Carry M. Delbo O. Adam V. Afonina R. Anquetin P. Antonini L. Arnold M. Audejean P. Aurard M. Bachschmidt B. Baduel E. Barbotin P. Barroy P. Baudouin L. Berard N. Berger L. Bernasconi J.-G. Bosch S. Bouley I. Bozhinova J. Brinsfield L. Brunetto G. Canaud J. Caron F. Carrier G. Casalnuovo S. Casulli M. Cerda L. Chalamet S. Charbonnel B. Chinaglia A. Cikota F. Colas J.-F. Coliac A. Collet J. Coloma M. Conjat E. Conseil R. Costa R. Crippa M. Cristofanelli Y. Damerdji Debackè A. re A. Decock Q. Déhais T. Déléage S. Delmelle C. Demeautis M. Drózdz G. Dubos T. Dulcamara M. Dumont R. Durkee R. Dymock A. Escalante del Valle N. Esseiva R. Esseiva M. Esteban T. Fauchez M. Fauerbach M. Fauvaud S. Fauvaud E. Forné C. Fournel D. Fradet J. Garlitz O. Gerteis C. Gillier M. Gillon R. Giraud J.-P. Godard R. Goncalves Hiroko Hamanowa Hiromi Hamanowa K. Hay S. Hellmich S. Heterier D. Higgins R. Hirsch G. Hodosan M. Hren A. Hygate N. Innocent H. Jacquinot S. Jawahar E. Jehin L. 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Wolf February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...586A.108H Astronomy and Astrophysics 586 24 2016A&A...586A.108H 10.1051/0004-6361/201527441 20 December 2016 1510.07422 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 20 December 2016 External links About NORC: 8ZtdVUB007A Smartest Brain Joins The Navy (1954) (time 0:45 min.) Lightcurve plot of 1750 Eckert, Palmer Divide Observatory, B. D. Warner (2009) 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 1750 1749 Telamon 1750 1751 Herget 001750 001750 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001750 001750 19500715