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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06261177627537604 5.0896e-08  
a 2.63096639347498 1.7501e-08 AU
q 2.466236914258692 1.3256e-07 AU
i 1.587393320072691 5.3303e-06 deg
node 319.8805246889702 0.00020917 deg
peri 113.0539464444345 0.00021482 deg
M 167.6779874380048 5.0468e-05 deg
tp 2456274.486109701637
(2012-Dec-12.98610970)
0.00021694 JED
period 1558.731736352957
4.27
1.5553e-05
4.258e-08
d
yr
n .230956996386248 2.3044e-09 deg/d
Q 2.795695872691268 1.8596e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1231  
   data-arc span      13933 days (38.15 yr)  
   first obs. used      1976-05-03  
   last obs. used      2014-06-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51723  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:52:44  

Additional Information
 Earth MOID = 1.48108 AU 
 T_jup = 3.397 
[ 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 13.3 mag n/a MPO263419  

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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