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9959 (1991 VF2)
Classification: Main-belt Asteroid          SPK-ID: 2009959
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398796140668026 4.9384e-08  
a 2.243838909815092 1.3948e-08 AU
q 1.929971589082082 1.1255e-07 AU
i 5.648500335525155 6.888e-06 deg
node 216.2210300575911 5.4468e-05 deg
peri 247.1167137383291 6.2646e-05 deg
M 274.584681520132 3.6173e-05 deg
tp 2457291.785725675427
(2015-Sep-26.28572568)
0.00012512 JED
period 1227.682143079166
3.36
1.1447e-05
3.134e-08
d
yr
n .2932355105345746 2.7341e-09 deg/d
Q 2.557706230548102 1.5899e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      9344 days (25.58 yr)  
   first obs. used      1989-03-02  
   last obs. used      2014-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51757  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:16:39  

Additional Information
 Earth MOID = .954794 AU 
 T_jup = 3.613 
[ 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 14.4 mag n/a MPO309229  

9959 (1991 VF2)          Discovered 1991-Nov-09 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 VF2 = 1989 EZ3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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