1529 Oterma

Hildian asteroid January 2020 yes 1529 Oterma #D6D6D6 26 January 1938 Y. Väisälä Turku Obs. (1529) Oterma 1938 BC1950 PV1959 RD 1A912 VO Liisi Oterma(astronomer) main-beltHilda 4 September 2017 (JD 2458000.5) 0 66.76 yr (24,385 days) 4.7933 AU 3.1916 AU 3.9924 AU 0.2006 7.98 yr (2,914 days) 50.497° 0.1236 ms / day 9.0582° 100.59° 295.08° 0.8116 AU 54.40 km (calculated)56.327 0.28560.16 1.11 km 15.75 h 0.047 0.0020.054 0.0030.057 (assumed) Tholen = PPB–V = 0.764U–B = 0.386 10.0510.11 0.26 1529 Oterma (provisional designation 1938 BC) is a reddish, rare-type Hildian asteroid from the outermost region of the asteroid belt, approximately 56 kilometers in diameter. It was discovered on 26 January 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It is named for Liisi Oterma. Orbit and classification thumb|left|200px|Orbit of 1529 Oterma Oterma is a member of the Hilda family (001), an asteroid family within the dynamical Hilda group, a large group of asteroids that orbit in resonance with the gas giant Jupiter. Hildian asteroids are thought to have originated from the Kuiper belt in the outer Solar System. It orbits the Sun in the outer main-belt at a distance of 3.2–4.8 AU once every 7 years and 12 months (2,914 days). Its orbit has an eccentricity of 0.20 and an inclination of 9° with respect to the ecliptic. It was first identified as A912 VO at Winchester Observatory in 1912 (799). The body's observation arc begins at Turku a few weeks after its official discovery observation. Physical characteristics Oterma belongs to an exclusive group of 33 known asteroids with a spectral P-type in the Tholen classification scheme. Photometry During a study of 47 Hilda asteroids in the 1990s, a rotational lightcurve of Oterma was obtained from photometric observations at the Swedish Uppsala Astronomical Observatory and other places. It gave a rotation period of 15.75 hours with a change in brightness of 0.18 magnitude (U=2). Diameter and albedo According to the space-based surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission and by the Japanese Akari satellite, Oterma measures 56.33 and 60.1 kilometers in diameter and its surface has an albedo of 0.054 and 0.047, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 54.40 kilometers, with an absolute magnitude of 10.05. Naming Oterma was named for Liisi Oterma (1915–2001), first Finnish female astronomer with a PhD and a discoverer of minor planets and comets at the Turku observatory between 1939 and 1953. The official 1529 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 1529 Oterma (1938 BC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001529 Jet Propulsion Laboratory 30 June 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1530 (1529) Oterma 1529 Oterma (1938 BC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1529 31 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 2009dmpn.book.....S JPL Small-Body Database – Query spectral type P (Tholen) JPL Solar System Dynamics http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=OBJ;c1_item=Ay;c1_op=%3D;c1_value=P;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAiArApAxAy;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AyA 16 August 2016 6 T. Grav A. K. Mainzer J. Bauer J. Masiero T. Spahr R. S. McMillan R. Walker R. Cutri E. Wright P. R. Eisenhardt E. Blauvelt E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand A. Wilkins January 2012 WISE/NEOWISE Observations of the Hilda Population: Preliminary Results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...744..197G The Astrophysical Journal 744 2 15 2012ApJ...744..197G 10.1088/0004-637X/744/2/197 1110.0283 44000310 31 December 2016 1529 31 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) 6 M. Dahlgren J. F. Lahulla C.-I. Lagerkvist J. Lagerros S. Mottola A. Erikson M. Gonano-Beurer M. Di Martino June 1998 A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..133..247D Icarus 133 2 247–285 1998Icar..133..247D 10.1006/icar.1998.5919 16 August 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 53493339 31 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/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 1529 1528 Conrada 1529 1530 Rantaseppä 001529 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001529 19380126