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39538 (1991 FD2)
Classification: Main-belt Asteroid          SPK-ID: 2039538
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1517876331969749 9.1849e-08  
a 2.34572753910703 2.178e-08 AU
q 1.98967510782101 2.233e-07 AU
i 2.547109637949877 9.3195e-06 deg
node 13.13618223179348 0.00015171 deg
peri 169.6416823829076 0.00015391 deg
M 154.2837256736023 2.5531e-05 deg
tp 2456238.116728665795
(2012-Nov-06.61672867)
9.0107e-05 JED
period 1312.244546833328
3.59
1.8276e-05
5.004e-08
d
yr
n .2743391091765189 3.8208e-09 deg/d
Q 2.701779970393051 2.5086e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      458  
   data-arc span      18738 days (51.30 yr)  
   first obs. used      1960-09-24  
   last obs. used      2012-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5823  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 04:59:40  

Additional Information
 Earth MOID = .992523 AU 
 T_jup = 3.544 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4 mag n/a MPO219821  

39538 (1991 FD2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla (809)
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 FD2 = 1980 BS5 = 2000 VH23 = 2000 WA189 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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