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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06275670568625731 5.2979e-08  
a 2.630614489036937 1.8649e-08 AU
q 2.465525789774442 1.3882e-07 AU
i 1.587416245185887 5.563e-06 deg
node 319.8834269571699 0.00021401 deg
peri 113.0150360315728 0.00021972 deg
M 121.5126589086026 5.0748e-05 deg
tp 2456274.478782765189
(2012-Dec-12.97878277)
0.00021888 JED
period 1558.419014984828
4.27
1.6572e-05
4.537e-08
d
yr
n .2310033415522108 2.4565e-09 deg/d
Q 2.795703188299432 1.982e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1206  
   data-arc span      13854 days (37.93 yr)  
   first obs. used      1976-05-03  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54492  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:53:40  

Additional Information
 Earth MOID = 1.47983 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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