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204786 Wehlau (2006 KU131)
Classification: Main-belt Asteroid          SPK-ID: 2204786
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04973054901433904 5.4362e-08  
a 2.586146715047684 1.726e-08 au
q 2.457536219076733 1.455e-07 au
i .3882594803555391 5.8204e-06 deg
node 287.297285895956 0.00081389 deg
peri 85.82152926238359 0.00081605 deg
M 58.89229853225919 5.837e-05 deg
tp 2458951.995550110841
(2020-Apr-12.49555011)
0.00024622 TDB
period 1519.071324938916
4.16
1.5208e-05
4.164e-08
d
yr
n .2369868972508424 2.3725e-09 deg/d
Q 2.714757211018635 1.8119e-08 au
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      7721 days (21.14 yr)  
   first obs. used      1999-11-15  
   last obs. used      2021-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57293  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 12:29:54  

Additional Information
 Earth MOID = 1.45573 au 
 Jupiter MOID = 2.49821 au 
 T_jup = 3.420 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456951.5 (2014-Oct-21.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05137525083825181 5.4729e-08  
q 2.453048643666203 1.4678e-07 au
tp 2457428.163965428156
(2016-Feb-09.66396543)
0.00023579 TDB
node 287.6613266449262 0.00081648 deg
peri 84.42713617133083 0.00081845 deg
i .3870422350509082 5.8206e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      7721 days (21.14 yr)  
   first obs. used      1999-11-15  
   last obs. used      2021-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57293  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 12:29:54  

Additional Information
 Jupiter MOID = 2.49821 au 
 T_jup = 3.420 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.99525640845239E-15 -7.985755818441987E-15 -2.108948140850113E-12 2.229611656809994E-14 -4.315783904367201E-13 -1.223752865986957E-16
q -7.985755818441987E-15 2.154495806622754E-14 5.364265813961147E-12 -5.547682103437338E-14 1.067499185083698E-12 3.765539182567302E-16
tp -2.108948140850113E-12 5.364265813961147E-12 5.559636750541558E-8 -6.703925842347811E-11 1.340100976823995E-8 8.426168679512834E-13
node 2.229611656809994E-14 -5.547682103437338E-14 -6.703925842347811E-11 6.666411917479515E-7 -6.666412065693566E-7 8.45421131180147E-10
peri -4.315783904367201E-13 1.067499185083698E-12 1.340100976823995E-8 -6.666412065693566E-7 6.698595315980982E-7 -8.45213755889793E-10
i -1.223752865986957E-16 3.765539182567302E-16 8.426168679512834E-13 8.45421131180147E-10 -8.45213755889793E-10 3.3878852777779E-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 17.1   n/a MPO494146  

204786 Wehlau           Discovered 2006 May 25 by P. A. Wiegert at Mauna Kea.
William Henry Wehlau (1926-1995) was an American-born Canadian astronomer who pioneered the field of stellar surface mapping using observed rotational variability of surface abundances and magnetic field strength. He served on the Board of the Canada-France-Hawaii Telescope from 1974 to 1985.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-04-25Last Updated: 2013-04-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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