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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519502343515719 9.0426e-08  
a 2.345391160672252 2.0329e-08 AU
q 1.989008424161998 2.1863e-07 AU
i 2.547278501502277 9.308e-06 deg
node 13.1353435045753 0.00014109 deg
peri 169.6452490717789 0.00014317 deg
M 209.154322504642 2.5485e-05 deg
tp 2457550.232891163158
(2016-Jun-10.73289116)
9.6915e-05 JED
period 1311.96229222297
3.59
1.7057e-05
4.67e-08
d
yr
n .2743981302923128 3.5676e-09 deg/d
Q 2.701773897182506 2.3418e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      467  
   data-arc span      19695 days (53.92 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-08-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57404  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:39:07  

Additional Information
 Earth MOID = .992587 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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