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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06231894007991011 5.0041e-08  
a 2.631623999025533 1.7314e-08 au
q 2.467623980717407 1.3074e-07 au
i 1.587221089153778 5.2976e-06 deg
node 319.8814198571168 0.00020607 deg
peri 113.0197876078656 0.00021174 deg
M 260.061868830624 5.0619e-05 deg
tp 2457833.375401578520
(2017-Mar-20.87540158)
0.00022046 JED
period 1559.316176366721
4.27
1.5389e-05
4.213e-08
d
yr
n .2308704324730451 2.2784e-09 deg/d
Q 2.795624017333658 1.8393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1251  
   data-arc span      14426 days (39.50 yr)  
   first obs. used      1976-05-03  
   last obs. used      2015-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51532  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 15:58:14  

Additional Information
 Earth MOID = 1.48206 au 
 Jupiter MOID = 2.36399 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 13.3 mag n/a MPO263419  

7937 (1990 QA2)          Discovered 1990-Aug-22 by Holt, H. E. at Palomar
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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