1987 Kaplan

Stony main-belt asteroid October 2019 yes 1987 Kaplan #D6D6D6 File:1987Kaplan (Lightcurve Inversion).png Lightcurve-based 3D-model of Kaplan P. F. Shajn Simeiz Obs. 11 September 1952 (1987) Kaplan 1952 RH Samuil Kaplan(Soviet astrophysicist) main-belt(inner)Phocaea 4 September 2017 (JD 2458000.5) 0 64.54 yr (23,573 days) 2.9234 AU 1.8422 AU 2.3828 AU 0.2269 3.68 yr (1,343 days) 238.97° 0.2680 ms / day 23.645° 314.23° 38.176° 11.70 2.27 km13.017 0.159 km13.52 0.39 km13.89 km (calculated)14.606 0.104 km 9.453 0.002 hlightcurve-plot-Warner-20119.45950 0.00005 h9.46 0.01 hlightcurve-plot-Warner-20009.49 0.02 h 0.2094 0.04480.23 (assumed)0.262 0.0530.278 0.0170.28 0.12 S (assumed) 11.4011.511.8112.23 1.34 1987 Kaplan, provisional designation 1952 RH, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 11 September 1952, by Soviet astronomer Pelageya Shajn at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Soviet astrophysicist Samuil Kaplan. Orbit and classification Kaplan is a member of the Phocaea family (701), a large family of stony asteroids with nearly two thousand known members.23 It orbits the Sun in the inner main belt at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,343 days). Its orbit has an eccentricity of 0.23 and an inclination of 24° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Simeiz in September 1952. Physical characteristics Kaplan is an assumed S-type asteroid, in agreement with the overall spectral type of the Phocaea family.23 Rotation period Between 2000 and 2011, three rotational lightcurves of Kaplan were obtained from photometric observations by astronomer Brian Warner at his Palmer Divide Observatory in Colorado, United States. Lightcurve analysis gave a well-defined rotation period between 9.453 and 9.49 hours with a brightness amplitude from 0.46 to 0.65 magnitude (U=3/3/3).lightcurve-plot-Warner-2000lightcurve-plot-Warner-2011 Poles In addition a modeled lightcurve, using photometric data from various sources, gave a concurring period of 9.45950 hours and determined two spin axis of (356.0°, −58.0°) and (233.0°, −89.0°) in ecliptic coordinates. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kaplan measures between 11.70 and 14.606 kilometers in diameter and its surface has an albedo between 0.2094 and 0.28. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.23 – derived from 25 Phocaea, the family's parent body and namesake, and calculates a diameter of 13.89 kilometers based on an absolute magnitude of 11.5. Naming This minor planet was named after Samuil Kaplan (1921–1978), Soviet astronomer and astrophysicist at Lvov University Observatory (067), Ukraine, and at the Radiophysical Research Institute in Nizhny Novgorod (formerly known as Gorky), Russia. His research included a variety of astrophysical fields, such as white dwarfs, interstellar matter, radiative transfer, solar radiation, pulsars and galactic nuclei. The official naming citation was published by the Minor Planet Center on 1 June 1980 (M.P.C. 5358). Notes lightcurve-plot-Warner-2000 Lightcurve plot of (1987) Kaplan, Brian Warner at the Palmer Divide Observatory (2000). Rotation period 9.46 0.01 hours with a brightness amplitude of 0.47 0.01 mag. Quality code of 3. Summary figures at the LCDB. lightcurve-plot-Warner-2011 Lightcurve plot of (1987) Kaplan, Brian Warner at the Palmer Divide Observatory (2011). Rotation period 9.453 0.002 hours with a brightness amplitude of 0.65 0.02 mag. Quality code of 3. Summary figures at the LCDB. References 30em 2017-03-27 last obs. JPL Small-Body Database Browser: 1987 Kaplan (1952 RH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001987 Jet Propulsion Laboratory 1 November 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 161 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1988 (1987) Kaplan 1987 Kaplan (1952 RH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1987 1 November 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 1 November 2017 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 1 November 2017 Asteroid 1987 Kaplan – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1987+Kaplan#Asteroid%201987%20KaplanEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 978-0-8165-3213-1 1987 1 November 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 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 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 Warner, B. September 2001 Asteroid Photometry at the Palmer Divide Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2001MPBu...28...40W The Minor Planet Bulletin 28 40–41 2001MPBu...28...40W 1 November 2017 Warner, Brian D. January 2011 Upon Further Review: V. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...63W The Minor Planet Bulletin 38 1 63–65 1052-8091 2011MPBu...38...63W 1 November 2017 Warner, Brian D. April 2012 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2011 September – December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...69W The Minor Planet Bulletin 39 2 69–80 1052-8091 2012MPBu...39...69W 1 November 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 1 November 2017 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 1 November 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 1987 1986 Plaut 1987 1988 Delores 001987 Category:Discoveries by Pelageya Shajn Category:Named minor planets 19520911