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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

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 
[ 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] (  
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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