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7937 (1990 QA2)
Classification: Main-belt Asteroid          SPK-ID: 2007937
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06315819022278056 5.6999e-08  
a 2.632131586556888 2.1352e-08 AU
q 2.465890919121739 1.5316e-07 AU
i 1.586825580085364 5.8117e-06 deg
node 319.8900802130362 0.00022702 deg
peri 113.461676452693 0.00023271 deg
M 28.66825987414924 5.1052e-05 deg
tp 2456276.289401587156
(2012-Dec-14.78940159)		 0.00022111 JED
period 1559.76733938236
4.27		 1.898e-05
5.196e-08		 d
yr
n .2308036531541645 2.8085e-09 deg/d
Q 2.798372253992037 2.2701e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      1147  
   data-arc span      13488 days (36.93 yr)  
   first obs. used      1976-05-03  
   last obs. used      2013-04-07  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .5471  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:28:49  

Additional Information
 Earth MOID = 1.48044 AU 
 T_jup = 3.396 
[ 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 13.7 mag n/a PDS3 (MPC 30745)  

7937 (1990 QA2)          Discovered 1990-Aug-22 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 QA2 = 1976 JR6 = 1981 NE1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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