1527 Malmquista

Main-belt asteroid other uses of Malmquist Malmquist (disambiguation) October 2019 yes 1527 Malmquista #D6D6D6 1527Malmquista (Lightcurve Inversion).png Lightcurve-based 3D-model of Malmquista padding: 5px 0; 18 October 1939 Y. Väisälä Turku Obs. (1527) Malmquista 1939 UG1929 TG1932 OB1972 TKA909 TC Gunnar Malmquist(astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 87.47 yr (31,948 days) 2.6694 AU 1.7846 AU 2.2270 AU 0.1987 3.32 yr (1,214 days) 203.99° 0.2966 ms / day 5.1939° 16.133° 304.49° 9.55 0.49 km10.040 0.134 km10.338 0.071 km10.80 km (calculated) 14.044 0.0244 h14.0591 h14.077 0.004 h 0.2202 0.01690.24 (assumed)0.307 0.037 S 12.012.212.481 0.002 (S) 1527 Malmquista (provisional designation 1939 UG) is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 18 October 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was named for the Swedish astronomer Gunnar Malmquist. Orbit and classification Malmquista is a member of the Flora family, one of the largest families of stony asteroids in the main belt. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,214 days). Its orbit has an eccentricity of 0.20 and an inclination of 5° with respect to the ecliptic. In 1909, it was first observed at Heidelberg Observatory as A909 TC. The body's observation arc begins at Lowell Observatory in 1929, when it was identified as 1929 TG, 10 years prior to its official discovery observation at Turku. Physical characteristics Rotation period In September 2002, a first rotational lightcurve of Malmquista was obtained from photometric observations by Stephen Brincat at Flarestar Observatory on the island of Malta. Lightcurve analysis gave a well-defined rotation period of 14.077 hours with a brightness variation of 0.60 magnitude (U=3). In September 2012, observations at the Palomar Transient Factory, California, gave a period of 14.044 hours and an amplitude of 0.42 magnitude (U=2). Spin axis In 2013, an international study modeled a lightcurve with a period of 14.0591 hours and found a spin axis of (5.0°, 80.0°) in ecliptic coordinates (λ, β) (U=n.a.). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Malmquista measures between 9.55 and 10.338 kilometers in diameter and its surface has an albedo between 0.220 and 0.307. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, a S-type asteroid and the family's largest member and namesake – and calculates a diameter of 10.80 kilometers with an absolute magnitude of 12.0. Naming This minor planet was named after Swedish astronomer Gunnar Malmquist (1893–1982), director of the Uppsala Astronomical Observatory in Sweden. The official 1527 naming citation was published by the Minor Planet Center in January 1956 (M.P.C. 1350). References 2017-03-29 last obs. JPL Small-Body Database Browser: 1527 Malmquista (1939 UG) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001527 Jet Propulsion Laboratory 13 June 2017 Dictionary of Minor Planet Names – (1527) Malmquista Schmadel Lutz D. Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1528 (1527) Malmquista 1527 Malmquista (1939 UG) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1527 7 April 2017 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 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 7 April 2017 1527 7 April 2017 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 7 April 2017 Brincat, Stephen M. December 2002 Rotation period and lightcurve of asteroid 1527 Malmquista http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003MPBu...30...19B The Minor Planet Bulletin 30 2 19 1052-8091 2003MPBu...30...19B 7 April 2017 6 J. Hanus M. Broz J. Durech B. D. Warner J. Brinsfield R. Durkee D. Higgins R. A. Koff J. Oey F. Pilcher R. Stephens L. P. Strabla Q. Ulisse R. Girelli November 2013 An anisotropic distribution of spin vectors in asteroid families http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...559A.134H Astronomy and Astrophysics 559 19 2013A&A...559A.134H 10.1051/0004-6361/201321993 1309.4296 7 April 2017 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 7 April 2017 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 1527 1526 Mikkeli 1527 1528 Conrada 001527 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19391018