+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2273767881275715 5.0688e-08   a 2.381847332304025 7.4286e-09 au q 1.840270536074511 1.2219e-07 au i 23.65169172137799 6.5898e-06 deg node 314.190122875639 9.5476e-06 deg peri 38.32697155892546 1.5405e-05 deg M 200.4893740368821 1.3072e-05 deg tp 2459795.417066041120 (2022-Aug-03.91706604) 5.022e-05 TDB period 1342.670072803323 3.68 6.2813e-06 1.72e-08 d yr n .2681224578487597 1.2543e-09 deg/d Q 2.923424128533538 9.1177e-09 au   Orbit Determination Parameters    # obs. used (total)      2287      data-arc span      24964 days (68.35 yr)      first obs. used      1952-09-11      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .35538      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:59:37   Additional Information  Earth MOID = .866239 au   Jupiter MOID = 2.56056 au   T_jup = 3.392  [ 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 11.63   n/a E2021B10   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 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 08:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin