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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1706707114577773 9.6338e-08  
a 2.700969173804354 2.3475e-08 AU
q 2.23999284328564 2.6071e-07 AU
i 12.00472037009231 1.0261e-05 deg
node 356.5060409286625 3.5912e-05 deg
peri 15.91268180339056 4.415e-05 deg
M 111.6915033548465 2.5338e-05 deg
tp 2456297.468126488829
(2013-Jan-04.96812649)
0.00011189 JED
period 1621.3540781942
4.44
2.1138e-05
5.787e-08
d
yr
n .2220366327390706 2.8947e-09 deg/d
Q 3.161945504323068 2.7482e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      11947 days (32.71 yr)  
   first obs. used      1981-09-03  
   last obs. used      2014-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48478  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:08:50  

Additional Information
 Earth MOID = 1.2404 AU 
 T_jup = 3.315 
[ 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 13.4 mag n/a MPO250420  

21043 (1990 RT2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar (675)
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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