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344355 (2001 WK81)
Classification: Main-belt Asteroid          SPK-ID: 2344355
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1963495722873752 4.975e-08  
a 2.369370273451339 1.0581e-08 au
q 1.904145433668747 1.1964e-07 au
i 1.58532570616954 5.474e-06 deg
node 164.9909964629285 0.00015205 deg
peri 212.422625414269 0.00015277 deg
M 113.6307387714084 1.1568e-05 deg
tp 2458780.024050948023
(2019-Oct-23.52405095)
4.2777e-05 TDB
period 1332.133745633973
3.65
8.9238e-06
2.443e-08
d
yr
n .270243135255667 1.8103e-09 deg/d
Q 2.83459511323393 1.2659e-08 au
  Orbit Determination Parameters
   # obs. used (total)      276  
   data-arc span      7106 days (19.46 yr)  
   first obs. used      2001-10-24  
   last obs. used      2021-04-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57969  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 12:09:47  

Additional Information
 Earth MOID = .904652 au 
 Jupiter MOID = 2.62807 au 
 T_jup = 3.519 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457831.5 (2017-Mar-19.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1972764819390101 5.0092e-08  
q 1.901297109879791 1.2051e-07 au
tp 2457446.108402076909
(2016-Feb-27.60840208)
4.298e-05 TDB
node 165.0391446574247 0.000152 deg
peri 211.9593970212708 0.0001527 deg
i 1.585277003661191 5.48e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      276  
   data-arc span      7106 days (19.46 yr)  
   first obs. used      2001-10-24  
   last obs. used      2021-04-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57969  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 12:09:47  

Additional Information
 Jupiter MOID = 2.62807 au 
 T_jup = 3.519 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.509198739007718E-15 -6.022442391007639E-15 -4.719944303555255E-13 4.586475997445449E-14 -2.197623747252496E-13 -2.229836228000942E-15
q -6.022442391007639E-15 1.452346060814661E-14 1.046876873623764E-12 -1.104543678864885E-13 5.067853591242632E-13 5.490551671018081E-15
tp -4.719944303555255E-13 1.046876873623764E-12 1.847304170748995E-9 -1.345394878695324E-11 6.374665063472231E-10 3.271379938011139E-13
node 4.586475997445449E-14 -1.104543678864885E-13 -1.345394878695324E-11 2.310412619245215E-8 -2.309931334719622E-8 1.783910196990167E-10
peri -2.197623747252496E-13 5.067853591242632E-13 6.374665063472231E-10 -2.309931334719622E-8 2.331760901148469E-8 -1.781959252064734E-10
i -2.229836228000942E-15 5.490551671018081E-15 3.271379938011139E-13 1.783910196990167E-10 -1.781959252064734E-10 3.00298555323005E-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 17.47   n/a MPCxxxxx  

344355 (2001 WK81)          Discovered 2001-Nov-20 by LINEAR at Socorro
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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