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21043 (1990 RT2)
Classification: Main-belt Asteroid          SPK-ID: 2021043
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1716288292982348 9.3187e-08  
a 2.698628350079818 2.2118e-08 au
q 2.235465925644592 2.5339e-07 au
i 12.01220749638586 1.0086e-05 deg
node 356.4946645335561 3.2395e-05 deg
peri 15.74175225432227 3.9174e-05 deg
M 245.2376864125918 2.4958e-05 deg
tp 2457916.690299451748
(2017-Jun-12.19029945)
0.00011592 JED
period 1619.246789244048
4.43
1.9907e-05
5.45e-08
d
yr
n .222325591374535 2.7332e-09 deg/d
Q 3.161790774515044 2.5914e-08 au
  Orbit Determination Parameters
   # obs. used (total)      853  
   data-arc span      12285 days (33.63 yr)  
   first obs. used      1981-09-03  
   last obs. used      2015-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48489  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:31  

Additional Information
 Earth MOID = 1.23539 au 
 Jupiter MOID = 2.3052 au 
 T_jup = 3.316 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5 mag n/a MPO337436  

21043 (1990 RT2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RT2 = 1981 RT7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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