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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3892458494885727 4.5418e-08  
a 3.077660568163465 2.3104e-08 au
q 1.879693965871194 1.366e-07 au
i 22.00796802464565 7.5178e-06 deg
node 171.0355431848034 1.5268e-05 deg
peri 312.3609773141052 1.8326e-05 deg
M 214.7324533487887 1.1647e-05 deg
tp 2459996.284743083474
(2023-Feb-20.78474308)
7.0061e-05 TDB
period 1972.102607321495
5.40
2.2207e-05
6.08e-08
d
yr
n .18254628266475 2.0556e-09 deg/d
Q 4.275627170455736 3.2097e-08 au
  Orbit Determination Parameters
   # obs. used (total)      460  
   data-arc span      10803 days (29.58 yr)  
   first obs. used      1991-02-10  
   last obs. used      2020-09-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:30:16  

Additional Information
 Earth MOID = .952465 au 
 Jupiter MOID = 1.21388 au 
 T_jup = 3.004 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457111.5 (2015-Mar-30.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3858362355037849 4.4956e-08  
q 1.893558235333012 1.3444e-07 au
tp 2458019.569917810180
(2017-Sep-23.06991781)
5.6837e-05 TDB
node 171.719665169214 1.5182e-05 deg
peri 311.588564619557 1.8483e-05 deg
i 21.88977314081735 7.5622e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      460  
   data-arc span      10803 days (29.58 yr)  
   first obs. used      1991-02-10  
   last obs. used      2020-09-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:30:16  

Additional Information
 Jupiter MOID = 1.21388 au 
 T_jup = 3.004 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.021069723255075E-15 -6.01373192352834E-15 8.797448770223443E-13 -3.189604602732452E-15 1.367361205446555E-13 -9.630326673438972E-15
q -6.01373192352834E-15 1.807422447962312E-14 -2.212549451655261E-12 -2.130513439964306E-16 -3.492510883762393E-13 2.500821000370124E-14
tp 8.797448770223443E-13 -2.212549451655261E-12 3.230483576651879E-9 -1.391608654790739E-12 6.161448196295953E-10 2.469177379748049E-12
node -3.189604602732452E-15 -2.130513439964306E-16 -1.391608654790739E-12 2.305035092866969E-10 -2.128228428091775E-10 2.112835273928915E-11
peri 1.367361205446555E-13 -3.492510883762393E-13 6.161448196295953E-10 -2.128228428091775E-10 3.416146181632389E-10 -1.852863637914926E-11
i -9.630326673438972E-15 2.500821000370124E-14 2.469177379748049E-12 2.112835273928915E-11 -1.852863637914926E-11 5.718622640274814E-11

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

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