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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398583212027725 5.2004e-08  
a 2.244098993582402 1.4619e-08 AU
q 1.930243075727136 1.1724e-07 AU
i 5.648142241142987 8.0352e-06 deg
node 216.2273462701789 5.5094e-05 deg
peri 247.0603086975432 6.3888e-05 deg
M 215.9988978288883 3.6277e-05 deg
tp 2457291.661999527630
(2015-Sep-26.16199953)
0.00012643 JED
period 1227.895600547832
3.36
1.1998e-05
3.285e-08
d
yr
n .2931845344501472 2.8648e-09 deg/d
Q 2.557954911437668 1.6663e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      826  
   data-arc span      9245 days (25.31 yr)  
   first obs. used      1989-03-02  
   last obs. used      2014-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51234  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:23:02  

Additional Information
 Earth MOID = .954773 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 14.3 mag n/a MPO263438  

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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