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100659 (1997 WM20)
Classification: Main-belt Asteroid          SPK-ID: 2100659
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03836729085757042 5.4645e-08  
a 2.650629894485526 1.7227e-08 au
q 2.548932406368028 1.4246e-07 au
i 2.204692246649342 4.6174e-06 deg
node 108.6964657443964 0.00016192 deg
peri 119.5009512928124 0.00017426 deg
M 312.3779916689603 6.2959e-05 deg
tp 2459409.010183452720
(2021-Jul-13.51018345)
0.00027542 TDB
period 1576.238984319634
4.32
1.5366e-05
4.207e-08
d
yr
n .2283917626586238 2.2265e-09 deg/d
Q 2.752327382603023 1.7888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      319  
   data-arc span      10399 days (28.47 yr)  
   first obs. used      1992-09-24  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61617  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:11  

Additional Information
 Earth MOID = 1.53785 au 
 Jupiter MOID = 2.21591 au 
 T_jup = 3.388 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO417507  

100659 (1997 WM20)          Discovered 1997-Nov-25 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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