1985 Hopmann

Dark main-belt asteroid October 2019 yes 1985 Hopmann #D6D6D6 001985-asteroid shape model (1985) Hopmann.png Shape of Hopmann modeled from its lightcurve K. Reinmuth Heidelberg Obs. 13 January 1929 (1985) Hopmann 1929 AE1951 CA 21951 CP1952 KE1964 PJ1973 AA 4 Josef Hopmann(German astronomer) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 88.16 yr (32,201 days) 3.6021 AU 2.6408 AU 3.1214 AU 0.1540 5.51 yr (2,014 days) 334.27° 0.1787 ms / day 17.159° 305.15° 234.25° 35.47 km (derived)35.51 3.1 km (IRAS:6)44.33 3.53 km 17.476 0.003 h17.478 0.004 h17.4787 0.0001 h17.480 0.002 h 0.039 0.007 (IRAS:6)0.0613 (derived) C 10.75 0.1910.910.91 1985 Hopmann (prov. designation: 1929 AE) is a dark background asteroid in the outer regions of the asteroid belt. It was discovered on 13 January 1929, by astronomer Karl Reinmuth at Landessternwarte Heidelberg-Königstuhl in southern Germany. The asteroid has a rotation period of 17.5 hours and measures approximately 36 km mi off 2 us in diameter. It was later named after German astronomer Josef Hopmann (1890–1975). Orbit and classification Hopmann is a dark C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,014 days). Its orbit has an eccentricity of 0.15 and an inclination of 17° with respect to the ecliptic. The first observation used for the body's observation arc was taken at the discovering observatory on 4 February 1926, or 22 days after its official discovering observation. Naming This minor planet was named in memory of German astronomer Josef Hopmann (1890–1975), a director of Vienna Observatory between 1951 and 1962, a productive observer of variable and binary stars, and a participant in the international program to observe near-Earth asteroid 433 Eros in the early 1930s. The lunar crater Hopmann is also named in his honour. The official 1985 naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4237). Physical characteristics According to the survey carried out by the Infrared Astronomical Satellite IRAS, Hopmann measures 35.51 kilometers in diameter. The Collaborative Asteroid Lightcurve Link agrees with the Supplemental IRAS Minor Planet Survey (SIMPS) data and derives an albedo of 0.039 and a diameter of 35.47 kilometers, while observations with NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission gave an albedo of 0.06 and a diameter of 44.33 kilometers. In January and February 2012, three rotational lightcurves were obtained by Robert Stephens at Santana Observatory (646), California, Josep Maria Aymami at Carmelita Observatory (B20), Barcelona, and Patricia Moravec at Oakley Southern Sky Observatory (E09), Australia. The lightcurves gave a well-defined rotation period of 17.476, 17.478 and 17.480 hours, respectively, with a brightness variation between 0.36 and 0.44 magnitude (U=3/3/3-). In 2016, a re-modeled lightcurve, constructed from data compiled in the Lowell Photometric Database, also gave a concurring period. References 2017-03-29 last obs. JPL Small-Body Database Browser: 1985 Hopmann (1929 AE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001985 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names https://archive.org/details/dictionaryminorp00schm limited Schmadel Lutz D. Springer Berlin Heidelberg (1985) Hopmann 160 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1986 1985 Hopmann (1929 AE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1985 25 October 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 1985 25 October 2016 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 25 October 2016 Stephens Robert D. July 2012 Asteroids Observed from GMARS and Santana Observatories: 2012 January - March Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_39-3.pdf 39 3 181–183 2012MPBu...39..181S 1052-8091 17 March 2020 23 March 2020 https://web.archive.org/web/20200323222606/http://www.minorplanet.info/MPB/issues/MPB_39-3.pdf dead Aymami Josep Maria July 2012 CCD Photometry and Lightcurve Analysis of Main-Belt Asteroids 14 Irene 4874 Burke, 1985 Hopmann, 3017 Petrovic, and 3070 Aitken from Observatori Carmelita in Tiana Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_39-3.pdf 39 3 179–181 2012MPBu...39..179A 1052-8091 17 March 2020 23 March 2020 https://web.archive.org/web/20200323222606/http://www.minorplanet.info/MPB/issues/MPB_39-3.pdf dead 6 Moravec Patricia Cochren Joseph Gerhardt Michael Harris Andrew Karnemaat Ryan Melton Elizabeth Stolze Kellen West Josh Ditteon Richard October 2012 Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2012 January–April Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_39-4.pdf 39 4 213–216 2012MPBu...39..213M 1052-8091 17 March 2020 20 July 2020 https://web.archive.org/web/20200720004354/http://www.minorplanet.info/MPB/issues/MPB_39-4.pdf dead J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 25 October 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 25 October 2016 External links Prof. Dr. phil. habil. Josef Hopmann, catalogus professorum (Leipzig University) Lightcurve Database Query (LCDB), at www.minorplanet.info 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1985 1984 Fedynskij 1985 1986 Plaut 001985 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19290113