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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 ]

[ hide orbit diagram ]

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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1963495577167611 5.0546e-08  
a 2.369370280114492 1.1229e-08 au
q 1.904145473546773 1.2206e-07 au
i 1.58532623901217 5.4927e-06 deg
node 164.9910555307673 0.00016242 deg
peri 212.4225496625625 0.0001634 deg
M 113.6307491489239 1.3211e-05 deg
tp 2458780.024010773664
(2019-Oct-23.52401077)
4.9349e-05 TDB
period 1332.133751253321
3.65
9.4699e-06
2.593e-08
d
yr
n .2702431341156987 1.9211e-09 deg/d
Q 2.834595086682211 1.3434e-08 au
  Orbit Determination Parameters
   # obs. used (total)      255  
   data-arc span      6611 days (18.10 yr)  
   first obs. used      2001-10-24  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 17:03:01  

Additional Information
 Earth MOID = .904652 au 
 Jupiter MOID = 2.62807 au 
 T_jup = 3.519 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457670.5 (2016-Oct-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1973664381285756 5.0842e-08  
q 1.900987185141825 1.2282e-07 au
tp 2457446.107380918859
(2016-Feb-27.60738092)
5.0813e-05 TDB
node 165.0397307343675 0.00016237 deg
peri 211.9425051783566 0.00016333 deg
i 1.585269306272996 5.4988e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      255  
   data-arc span      6611 days (18.10 yr)  
   first obs. used      2001-10-24  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 17:03:01  

Additional Information
 Jupiter MOID = 2.62807 au 
 T_jup = 3.519 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.584890765857288E-15 -6.228554530256377E-15 -2.374073634292966E-13 5.331355372817511E-14 -1.397062225601952E-13 -2.309797787185027E-15
q -6.228554530256377E-15 1.508373804547548E-14 4.11007219742039E-13 -1.287550832736186E-13 2.877556232232191E-13 5.722542350244236E-15
tp -2.374073634292966E-13 4.11007219742039E-13 2.581930072831079E-9 -1.04863784752413E-11 9.091966616879798E-10 -4.586045493671011E-14
node 5.331355372817511E-14 -1.287550832736186E-13 -1.04863784752413E-11 2.636417398493023E-8 -2.635687214950144E-8 2.029596912512006E-10
peri -1.397062225601952E-13 2.877556232232191E-13 9.091966616879798E-10 -2.635687214950144E-8 2.66753805894656E-8 -2.028933851881269E-10
i -2.309797787185027E-15 5.722542350244236E-15 -4.586045493671011E-14 2.029596912512006E-10 -2.028933851881269E-10 3.023632974591556E-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 17.4   n/a MPO494802  

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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