1617 Alschmitt

Main-belt asteroid October 2019 yes 1617 Alschmitt #D6D6D6 20 March 1952 L. Boyer Algiers Obs. (1617) Alschmitt Alfred Schmitt (astronomer) 1952 FB1929 CC 11935 ER1941 HH1947 LS1952 DK 21975 AJA906 DC main-belt(outer) 4 September 2017 (JD 2458000.5) 0 111.18 yr (40,607 days) 3.6085 AU 2.7913 AU 3.1999 AU 0.1277 5.72 yr (2,091 days) 167.85° 0.1722 ms / day 13.265° 154.96° 24.216° 21.12 2.86 km21.283 0.267 km36.78 km (calculated) 7.0602 0.0033 h7.0613 0.0007 h7.062 0.002 h 0.057 (assumed)0.190 0.0460.270 0.020 C 10.410.8010.807 0.002 (R)10.9 1617 Alschmitt, provisional designation 1952 FB, is an assumed carbonaceous asteroid from in the outer parts of the main belt, approximately 30 kilometers in diameter. It was discovered on 20 March 1952, by French astronomer Louis Boyer at Algiers Observatory in Algeria, Northern Africa, and named after French astronomer Alfred Schmitt. Orbit and classification This asteroid orbits the Sun in the outer main-belt at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,091 days). Its orbit has an eccentricity of 0.13 and an inclination of 13° with respect to the ecliptic. Alschmitt was first identified as A906 DC at Heidelberg in 1906, extending the body's observation arc by 46 years prior to its official discovery observation. Physical characteristics Alschmitt is a presumed carbonaceous C-type asteroid. Lightcurves Two rotational lightcurve of Alschmitt obtained in 2003 and 2004, by René Roy and Laurent Bernasconi, gave a well-defined rotation period of 7.0613 and 7.062 hours with a brightness variation of 0.39 and 0.52 in magnitude, respectively (U=3/3). In October 2010, the Palomar Transient Factory derived a period of 7.0602 hours with an amplitude 0.49 magnitude (U=2). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alschmitt measures 21.12 and 21.28 kilometers in diameter, and its surface has an albedo of 0.190 and 0.270, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 36.78 kilometers using an absolute magnitude of 10.9. Naming Boyer named this minor planet for his colleague Alfred Schmitt (1907–1973), astronomer at Algiers, Strasbourg and Quito observatories, who, 20 years earlier, had named the asteroid 1215 Boyer in his honor. The official 1617 naming citation was published by the Minor Planet Center on 1 August 1978 (M.P.C. 4418). References 2017-04-26 last obs. JPL Small-Body Database Browser: 1617 Alschmitt (1952 FB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001617 Jet Propulsion Laboratory 4 June 2017 Dictionary of Minor Planet Names – (1617) Alschmitt Schmadel Lutz D. Springer Berlin Heidelberg 128 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1618 (1617) Alschmitt 1617 Alschmitt (1952 FB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1617 28 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited 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 – (1617) Alschmitt Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001617 28 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001617 dead 1617 28 December 2016 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 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 28 December 2016 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 http://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 28 December 2016 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 28 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 1617 1616 Filipoff 1617 1618 Dawn 001617 Category:Discoveries by Louis Boyer (astronomer) Category:Named minor planets 19520320