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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2271855954561109 5.128e-08  
a 2.382202871737905 7.4383e-09 au
q 1.841000693824872 1.2361e-07 au
i 23.65096769833193 6.7067e-06 deg
node 314.1891837906184 9.6605e-06 deg
peri 38.31965779175649 1.5685e-05 deg
M 146.8861702774704 1.3075e-05 deg
tp 2458452.544930023214
(2018-Nov-30.04493002)
4.7584e-05 TDB
period 1342.970715479941
3.68
6.29e-06
1.722e-08
d
yr
n .2680624349067402 1.2555e-09 deg/d
Q 2.923405049650939 9.1282e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2144  
   data-arc span      24701 days (67.63 yr)  
   first obs. used      1952-09-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .354  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:33:16  

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 5358Last Updated: 2006-03-21

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