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204786 Wehlau (2006 KU131)
Classification: Main-belt Asteroid          SPK-ID: 2204786
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05113219547851357 9.437e-08  
a 2.5858781885216 3.4204e-08 au
q 2.453656559502489 2.6163e-07 au
i .3868774012828619 7.866e-06 deg
node 287.6172851700913 0.0012634 deg
peri 84.11087849512397 0.0012658 deg
M 41.16045545013849 7.9346e-05 deg
tp 2457426.844640172967
0.00033415 JED
period 1518.834737226444
n .2370238125165604 4.7027e-09 deg/d
Q 2.718099817540711 3.5953e-08 au
  Orbit Determination Parameters
   # obs. used (total)      151  
   data-arc span      5774 days (15.81 yr)  
   first obs. used      1999-11-15  
   last obs. used      2015-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58017  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-05 17:39:23  

Additional Information
 Earth MOID = 1.45185 au 
 Jupiter MOID = 2.50468 au 
 T_jup = 3.420 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.2 mag n/a MPO251551  

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 | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-Apr-29 17:50 UT
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