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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521791198067707 8.6962e-08  
a 2.345665538592194 1.7024e-08 au
q 1.988704221568159 2.1065e-07 au
i 2.547342704720681 8.2776e-06 deg
node 13.13449743305385 0.00011803 deg
peri 169.598320990143 0.00011968 deg
M 318.9798778248764 2.3065e-05 deg
tp 2457550.017493110036
(2016-Jun-10.51749311)
8.5097e-05 JED
period 1312.192520778389
3.59
1.4285e-05
3.911e-08
d
yr
n .2743499862249245 2.9867e-09 deg/d
Q 2.702626855616229 1.9615e-08 au
  Orbit Determination Parameters
   # obs. used (total)      633  
   data-arc span      20174 days (55.23 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55679  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:38:07  

Additional Information
 Earth MOID = .991093 au 
 Jupiter MOID = 2.25794 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
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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