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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456920.5 (2014-Sep-20.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03986164046963071 5.4253e-08  
q 2.544501064567746 1.4171e-07 au
tp 2456260.549818127027
(2012-Nov-29.04981813)
0.0002722 TDB
node 108.7355203332302 0.00016185 deg
peri 120.4255751302769 0.00017349 deg
i 2.204997079825484 4.6194e-06 deg
  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
 Jupiter MOID = 2.21591 au 
 T_jup = 3.388 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.943372926782181E-15 -7.638031749611498E-15 -2.806610321792449E-12 -2.346864720080597E-14 -5.776490507461588E-13 -2.299313190904478E-16
q -7.638031749611498E-15 2.008106975805103E-14 6.405621249519949E-12 6.064607321207009E-14 1.318753964421474E-12 6.849852545404707E-16
tp -2.806610321792449E-12 6.405621249519949E-12 7.409073538748925E-8 -1.108272840770789E-10 1.705459726574376E-8 -6.070470601521337E-13
node -2.346864720080597E-14 6.064607321207009E-14 -1.108272840770789E-10 2.6194439819495E-8 -2.620027891112435E-8 -6.446428745982759E-11
peri -5.776490507461588E-13 1.318753964421474E-12 1.705459726574376E-8 -2.620027891112435E-8 3.009743229489832E-8 6.428977233527582E-11
i -2.299313190904478E-16 6.849852545404707E-16 -6.070470601521337E-13 -6.446428745982759E-11 6.428977233527582E-11 2.133862832923173E-11

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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