+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1987 Kaplan (1952 RH) Classification: Main-belt Asteroid          SPK-ID: 2001987 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2275466549411485 2.1214e-08   a 2.381482608156449 6.7332e-09 au q 1.839584206869927 5.0235e-08 au i 23.65175975863168 5.5503e-07 deg node 314.1901711398401 3.2527e-06 deg peri 38.34822585547015 1.0277e-05 deg M 253.0305560372304 6.9391e-06 deg tp 2459795.365786786269 (2022-Aug-03.86578679) 2.6668e-05 TDB period 1342.3616868854 3.68 5.6929e-06 1.559e-08 d yr n .2681840546531733 1.1374e-09 deg/d Q 2.923381009442971 8.2653e-09 au   Orbit Determination Parameters    # obs. used (total)      2495      data-arc span      25125 days (68.79 yr)      first obs. used      1952-09-11      last obs. used      2021-06-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .34552      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 13:00:53   Additional Information  Earth MOID = .866699 au   Jupiter MOID = 2.56066 au   T_jup = 3.392  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.64   n/a MPO614063   diameter diameter 13.017 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 9.453 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2001) Minor Planet Bull. 28, 40-41.] [Warner, B.D. (2011) Minor Planet Bull. 38, 63-65.] [Warner, B.D (2012) Minor Planet Bull. 39, 69-80.] [Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.] [Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.] [Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.262   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1987 Kaplan           Discovered 1952 Sept. 11 by P. F. Shajn at Simeis. Named in memory of Samuil Aronovich Kaplan (1921-1978), head of the astrophysics department at the Lvov Observatory from 1948 to 1961 and subsequently a staff member of the Scientific Research Radiophysics Institute in Gorkij. He contributed extensively to a wide range of astrophysical topics, including white dwarfs, interstellar matter, radiative transfer, solar radiation, pulsars and galactic nuclei. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC 5358 Last Updated: 2006-03-21 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-26 14:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin