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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1706707638179755 1.0208e-07  
a 2.700969170756041 2.2365e-08 AU
q 2.239992699334303 2.7401e-07 AU
i 12.00472173920563 1.0254e-05 deg
node 356.5060673629637 3.7863e-05 deg
peri 15.91266271226812 4.5997e-05 deg
M 111.6914990087864 2.6369e-05 deg
tp 2456297.468146914029
(2013-Jan-04.96814691)
0.00011643 JED
period 1621.354075449411
4.44
2.0138e-05
5.513e-08
d
yr
n .2220366331149563 2.7578e-09 deg/d
Q 3.161945642177778 2.6182e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      754  
   data-arc span      11836 days (32.41 yr)  
   first obs. used      1981-09-03  
   last obs. used      2014-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49966  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 18:32:06  

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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