+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2271855960444744 5.1262e-08   a 2.382202871635081 7.4269e-09 au q 1.841000692343807 1.2356e-07 au i 23.6509676464564 6.6951e-06 deg node 314.1891839333711 9.5739e-06 deg peri 38.3196579337998 1.5587e-05 deg M 146.8861701478928 1.306e-05 deg tp 2458452.544930542078 (2018-Nov-30.04493054) 4.7523e-05 TDB period 1342.97071539299 3.68 6.2804e-06 1.719e-08 d yr n .2680624349240959 1.2536e-09 deg/d Q 2.923405050926356 9.1142e-09 au   Orbit Determination Parameters    # obs. used (total)      2220      data-arc span      24737 days (67.73 yr)      first obs. used      1952-09-11      last obs. used      2020-06-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .35422      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:39:37   Additional Information  Earth MOID = .868767 au   Jupiter MOID = 2.56011 au   T_jup = 3.391  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.6   n/a MPO502172   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. 2019-August); 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.] 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 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-22 09:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin