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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519502356308107 8.9252e-08  
a 2.345391159808766 1.9181e-08 AU
q 1.989008420429404 2.1502e-07 AU
i 2.547278340201476 9.2451e-06 deg
node 13.13530061260423 0.00012732 deg
peri 169.6452919882156 0.0001293 deg
M 209.1543231307965 2.5e-05 deg
tp 2457550.232888577651
(2016-Jun-10.73288858)
9.5448e-05 JED
period 1311.962291498447
3.59
1.6094e-05
4.406e-08
d
yr
n .2743981304438475 3.3661e-09 deg/d
Q 2.701773899188129 2.2096e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      506  
   data-arc span      19730 days (54.02 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57424  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 15:22:21  

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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