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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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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
4.7523e-05 TDB
period 1342.97071539299
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 
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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] (  
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] (  

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 5358Last Updated: 2006-03-21

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2119-Mar-23 21:21 < 00:01 Ceres 0.0499610036331712 0.0499523541073064 0.0499696532769639 10.7004215989078 10.7004208086667 2495090.389690619 0.440431742415898 447.537742668796 34.6368113937892 -15.7661925640058 60710.2178916701 T 32 CATAB v2.0f-lin.ifort 2020-Jun-23 15:39:51 2020-Jun-23 15:39
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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