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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 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519502244735007 9.1855e-08  
a 2.345391157145496 2.1766e-08 AU
q 1.989008444339074 2.2327e-07 AU
i 2.54727825769174 9.3204e-06 deg
node 13.13521526798962 0.0001517 deg
peri 169.6453821708015 0.0001539 deg
M 209.1543207005352 2.583e-05 deg
tp 2457550.232896497989
(2016-Jun-10.73289650)
9.7732e-05 JED
period 1311.962289263781
3.59
1.8264e-05
5e-08
d
yr
n .2743981309112299 3.8198e-09 deg/d
Q 2.701773869951918 2.5074e-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 = .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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