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3620 Platonov (1981 RU2)
Classification: Main-belt Asteroid          SPK-ID: 2003620
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1126359350620058 1.5856e-08  
a 2.988743196959555 1.4625e-08 au
q 2.652103312309807 5.2606e-08 au
i 8.967567671816875 8.4146e-07 deg
node 272.337850745623 6.1776e-06 deg
peri 125.1102340464101 1.2453e-05 deg
M 188.1308253143985 1.4699e-05 deg
tp 2460101.504206281512
(2023-Jun-06.00420628)
8.0015e-05 TDB
period 1887.258229142577
5.17
1.3853e-05
3.793e-08
d
yr
n .1907529104607777 1.4001e-09 deg/d
Q 3.325383081609303 1.6272e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2062  
   data-arc span      23904 days (65.45 yr)  
   first obs. used      1955-10-11  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46127  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:06:40  

Additional Information
 Earth MOID = 1.67176 au 
 Jupiter MOID = 2.08048 au 
 T_jup = 3.229 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.51   n/a E2021B10  
diameter diameter 12.677 km 0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.145   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3620 Platonov (1981 RU2)          Discovered 1981-Sep-07 by Karachkina, L. G. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 RU2 = 1955 TG = 1978 EN4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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