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21038 (1990 EP3)
Classification: Main-belt Asteroid          SPK-ID: 2021038
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1154536002822123 3.3902e-08  
a 3.185299671768231 1.8922e-08 au
q 2.817545356684839 1.0426e-07 au
i 5.523645092775744 4.6026e-06 deg
node 331.2012424287944 3.752e-05 deg
peri 254.758639188631 4.2826e-05 deg
M 94.04162667050124 1.9912e-05 deg
tp 2458658.072743862078
(2019-Jun-23.57274386)
0.00011513 TDB
period 2076.461447161513
5.69
1.8503e-05
5.066e-08
d
yr
n .1733718680364202 1.5448e-09 deg/d
Q 3.553053986851622 2.1107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      11207 days (30.68 yr)  
   first obs. used      1990-02-28  
   last obs. used      2020-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50219  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:15:33  

Additional Information
 Earth MOID = 1.81388 au 
 Jupiter MOID = 1.49312 au 
 T_jup = 3.181 
[ 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 13.6   n/a MPO474042  
diameter diameter 11.561 km 1.892 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.058   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21038 (1990 EP3)          Discovered 1990-Mar-02 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 EP3 = 1990 GJ = 1998 SF82 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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