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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 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .151787692632362 9.1404e-08  
a 2.345727531789069 1.5444e-08 AU
q 1.989674962194601 2.181e-07 AU
i 2.54711272752135 9.6052e-06 deg
node 13.13619519222256 0.000153 deg
peri 169.6416735707371 0.00015518 deg
M 154.2837287222504 2.4479e-05 deg
tp 2456238.116720184795
(2012-Nov-06.61672018)
8.7829e-05 JED
period 1312.244540692618
3.59
1.2959e-05
3.548e-08
d
yr
n .2743391104603016 2.7093e-09 deg/d
Q 2.701780101383537 1.7788e-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      .6073  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-06 01:55:00  

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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