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100031 (1991 FM2)
Classification: Main-belt Asteroid          SPK-ID: 2100031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3879042183889438 4.5454e-08  
a 3.08091107337949 2.3129e-08 au
q 1.885812671534377 1.3685e-07 au
i 21.93341687343258 8.9755e-06 deg
node 171.200342429636 1.7517e-05 deg
peri 312.1402139991155 2.1978e-05 deg
M 178.3497805391139 1.2823e-05 deg
tp 2458021.940471644575
(2017-Sep-25.44047164)
6.5008e-05 TDB
period 1975.227719053426
5.41
2.2243e-05
6.09e-08
d
yr
n .1822574665834075 2.0524e-09 deg/d
Q 4.276009475224604 3.2101e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      10703 days (29.30 yr)  
   first obs. used      1991-02-10  
   last obs. used      2020-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55728  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:11:54  

Additional Information
 Earth MOID = .958785 au 
 Jupiter MOID = 1.2152 au 
 T_jup = 3.005 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO264053  

100031 (1991 FM2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Alternate Designations
 1991 FM2 = 2002 JD37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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