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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1965164641888613 4.9756e-08  
a 2.369076993269406 1.06e-08 au
q 1.903514359160924 1.1964e-07 au
i 1.585590340698285 5.4746e-06 deg
node 164.9915205113005 0.00015203 deg
peri 212.4153594653321 0.00015275 deg
M 166.6007877630013 1.1573e-05 deg
tp 2458780.129649485790
(2019-Oct-23.62964949)
4.2722e-05 TDB
period 1331.886416412214
3.65
8.9391e-06
2.447e-08
d
yr
n .2702933189826762 1.8141e-09 deg/d
Q 2.834639627377889 1.2683e-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-Jul-09 06:34:10  

Additional Information
 Earth MOID = .904634 au 
 Jupiter MOID = 2.62895 au 
 T_jup = 3.519 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457833.5 (2017-Mar-21.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1972747244251978 5.0092e-08  
q 1.901303754716754 1.2051e-07 au
tp 2457446.108174931070
(2016-Feb-27.60817493)
4.2981e-05 TDB
node 165.0391487914663 0.000152 deg
peri 211.9596753281264 0.0001527 deg
i 1.5852767388494 5.4799e-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-Jul-09 06:34:10  

Additional Information
 Jupiter MOID = 2.62895 au 
 T_jup = 3.519 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.509172192047588E-15 -6.022357875941349E-15 -4.720031080175474E-13 4.586477952216981E-14 -2.197622470667369E-13 -2.229801219988202E-15
q -6.022357875941349E-15 1.452320539509201E-14 1.046940418090204E-12 -1.104555564028697E-13 5.068033063588233E-13 5.490397971495481E-15
tp -4.720031080175474E-13 1.046940418090204E-12 1.847371573589881E-9 -1.345466220055553E-11 6.374903674038178E-10 3.271420290233629E-13
node 4.586477952216981E-14 -1.104555564028697E-13 -1.345466220055553E-11 2.310412048539598E-8 -2.309930793182831E-8 1.783916659053209E-10
peri -2.197622470667369E-13 5.068033063588233E-13 6.374903674038178E-10 -2.309930793182831E-8 2.33176120974762E-8 -1.781965759762649E-10
i -2.229801219988202E-15 5.490397971495481E-15 3.271420290233629E-13 1.783916659053209E-10 -1.781965759762649E-10 3.002982439680145E-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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