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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3879042184168787 4.5281e-08  
a 3.080911072544557 2.3044e-08 au
q 1.885812670937253 1.3623e-07 au
i 21.93341813962564 7.5387e-06 deg
node 171.200344221101 1.5282e-05 deg
peri 312.1402155984632 1.8385e-05 deg
M 178.3497787011024 1.147e-05 deg
tp 2458021.940482127060
(2017-Sep-25.44048213)
5.6375e-05 TDB
period 1975.22771825049
5.41
2.2161e-05
6.067e-08
d
yr
n .1822574666574957 2.0449e-09 deg/d
Q 4.27600947415186 3.1983e-08 au
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      10803 days (29.58 yr)  
   first obs. used      1991-02-10  
   last obs. used      2020-09-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55755  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:08:28  

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 14.98   n/a E2021B55  

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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