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410686 (2008 WU81)
Classification: Main-belt Asteroid          SPK-ID: 2410686
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1943383381175426 1.1466e-07  
a 2.172523566153365 4.677e-08 au
q 1.750318946785923 2.8002e-07 au
i 3.284308421705473 9.7567e-06 deg
node 133.537892694493 0.00011572 deg
peri 237.2137016712432 0.00013201 deg
M 255.3690594190957 7.1086e-05 deg
tp 2459340.440414541710
(2021-May-05.94041454)
0.00024125 TDB
period 1169.621037100284
3.20
3.777e-05
1.034e-07
d
yr
n .3077920014952102 9.9392e-09 deg/d
Q 2.594728185520807 5.5859e-08 au
  Orbit Determination Parameters
   # obs. used (total)      52  
   data-arc span      4790 days (13.11 yr)  
   first obs. used      2005-12-29  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .76761  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:52:04  

Additional Information
 Earth MOID = .752516 au 
 Jupiter MOID = 2.86938 au 
 T_jup = 3.661 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456696.5 (2014-Feb-08.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1938843115137169 1.151e-07  
q 1.751422750243678 2.8114e-07 au
tp 2457000.420496878861
(2014-Dec-08.92049688)
0.00017375 TDB
node 133.5720818573415 0.00011566 deg
peri 237.0078922078395 0.00013209 deg
i 3.284639560812886 9.7606e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      52  
   data-arc span      4790 days (13.11 yr)  
   first obs. used      2005-12-29  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .76761  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:52:04  

Additional Information
 Jupiter MOID = 2.86938 au 
 T_jup = 3.661 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.324735861305643E-14 -3.225043377979716E-14 -1.60455252937411E-11 2.198298641972169E-13 -5.715758199987672E-12 -5.461896244218423E-14
q -3.225043377979716E-14 7.903995047062666E-14 4.062899278830669E-11 -5.546028795801013E-13 1.446633735899031E-11 1.336548744189261E-13
tp -1.60455252937411E-11 4.062899278830669E-11 3.018802956374562E-8 -4.098831693443005E-10 1.109733864437416E-8 6.086087624550414E-11
node 2.198298641972169E-13 -5.546028795801013E-13 -4.098831693443005E-10 1.33764341392278E-8 -1.349811104898101E-8 4.023729403630669E-10
peri -5.715758199987672E-12 1.446633735899031E-11 1.109733864437416E-8 -1.349811104898101E-8 1.744787494350449E-8 -3.812765007559427E-10
i -5.461896244218423E-14 1.336548744189261E-13 6.086087624550414E-11 4.023729403630669E-10 -3.812765007559427E-10 9.526861765145047E-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 18.9   n/a MPO472145  

410686 (2008 WU81)          Discovered 2008-Nov-20 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-10-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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