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18285 Vladplatonov (1972 GJ)
Classification: Main-belt Asteroid          SPK-ID: 2018285
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1242189634859489 4.7978e-08  
a 2.671014717635651 1.4392e-08 au
q 2.339224037955236 1.3006e-07 au
i 12.36497368689883 5.0415e-06 deg
node 35.87821606040836 2.1724e-05 deg
peri 141.8080494321276 2.9208e-05 deg
M 30.19660715887514 2.134e-05 deg
tp 2458866.757789565851
(2020-Jan-18.25778957)
9.4057e-05 TDB
period 1594.457135630303
4.37
1.2887e-05
3.528e-08
d
yr
n .2257821749831417 1.8248e-09 deg/d
Q 3.002805397316066 1.618e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1736  
   data-arc span      25525 days (69.88 yr)  
   first obs. used      1950-02-17  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:43:54  

Additional Information
 Earth MOID = 1.35336 au 
 Jupiter MOID = 1.98044 au 
 T_jup = 3.337 
[ 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 12.8   n/a MPO384911  
diameter diameter 16.250 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.103 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.060   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18285 Vladplatonov           Discovered 1972 Apr. 14 by L. I. Chernykh at the Crimean Astrophysical Observatory.
Vladimir Petrovich Platonov (b. 1938), well-known journalist and documentary-film director, is the author of many books, articles and films about the creators of space-rocket technologies and the many challenges in that field.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110615/MPCPages.arcLast Updated: 2013-03-28

[ show close-approach data ]
Alternate Designations
 1972 GJ = 1972 JD = 2000 OP50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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