1726 Hoffmeister

Asteroid October 2019 yes 1726 Hoffmeister #D6D6D6 24 July 1933 K. Reinmuth Heidelberg Obs. (1726) Hoffmeister 1933 OE1955 FC1955 HX1957 WDA924 UA Cuno Hoffmeister(German astronomer) main-belt(middle)Hoffmeister 4 September 2017 (JD 2458000.5) 0 91.85 yr (33,547 days) 2.9051 AU 2.6702 AU 2.7877 AU 0.0421 4.65 yr (1,700 days) 42.063° 0.2118 ms / day 3.4833° 230.97° 69.026° 17.35 km (calculated)22.03 5.3922.52 0.23 km24.61 0.5225.250 0.079 km25.438 0.118 km25.67 8.37 11.7058 0.0056 h 0.03 0.030.0360 0.00660.037 0.0050.042 0.0060.044 0.0020.05 0.050.057 (assumed) SMASS = CbC 12.082 0.002 (R)12.1012.2612.212.312.5312.54 0.24 1726 Hoffmeister, provisional designation 1933 OE, is a carbonaceous asteroid and namesake of the Hoffmeister family from the central region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 24 July 1933, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany, and named after astronomer Cuno Hoffmeister. Orbit and classification Hoffmeister is the namesake and lowest-numbered member of the very compact Hoffmeister family (519), which, based upon its low albedo, was most likely formed from the breakup of a 50–100 kilometer-sized, carbon-rich parent body within the past several hundred million years. It orbits the Sun in the central main-belt at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,700 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.04 and an inclination of 3° with respect to the ecliptic. It was first identified as 1924 UA at the Yerkes Observatory in 1924, extending the asteroid's observation arc by 9 years prior to its official discovery observation at Heidelberg. Physical characteristics In the SMASS classification, Hoffmeister is characterized as a Cb-type, a subtype of the carbonaceous C-complex. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hoffmeister measures between 22.03 and 25.67 kilometers in diameter, and its surface has a low albedo between 0.03 and 0.05. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 17.4 kilometers with an absolute magnitude of 12.53. Rotational lightcurve In December 2009, a rotational lightcurve of Hoffmeister was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. It gave a rotation period of 11.7058 0.0056 hours with a brightness variation of 0.40 magnitude (U=2). Naming This minor planet was named in memory of German astronomer Cuno Hoffmeister (1892–1968), who founded the Sonneberg Observatory in 1925, and became one of its directors (see 1039 Sonneberga). Hoffmeister discovered thousands of variable stars, co-discovered comet C/1959 O1, thoroughly investigated a large number of meteors, and discovered 5 minor planets: 2183 Neufang, 3203 Huth, 3674 Erbisbühl, 4183 Cuno (which was later named after him) and 4724 Brocken. The lunar crater Hoffmeister was also named in his honor. The official 1726 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3933). References 30em 2016-08-27 last obs. JPL Small-Body Database Browser: 1726 Hoffmeister (1933 OE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001726 https://web.archive.org/web/20200820190630/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001726 dead 20 August 2020 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1726) Hoffmeister Schmadel Lutz D. Springer Berlin Heidelberg 137 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1727 (1726) Hoffmeister 1726 Hoffmeister (1933 OE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1726 28 October 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S V. Carruba B. Novakovic S. Aljbaae March 2017 The Hoffmeister asteroid family Monthly Notices of the Royal Astronomical Society 465 4 4099–4105 2017MNRAS.465.4099C 10.1093/mnras/stw3022 free 1611.06176 Migliorini, F. Manara, A. di Martino, M. Farinella, P. June 1996 The Hoffmeister asteroid family: inferences from physical data. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1996A&A...310..681M Astronomy and Astrophysics 310 681–685 1996A&A...310..681M 17 November 2015 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 28 October 2016 1726 28 October 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 35447010 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 46350317 28 October 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 8342929 28 October 2016 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 19 April 2017 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 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 53493339 28 October 2016 External links List of 1819 members of the Hoffmeister family, D. Nesvorny, M. Broz, V. Carruba (2015), data 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 1726 1725 CrAO 1726 1727 Mette 001726 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001726 19330724