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441861 (2009 WF219)
Classification: Main-belt Asteroid          SPK-ID: 2441861
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1695648445216087 5.2613e-08  
a 2.194080516519408 2.2725e-08 au
q 1.822041594867904 1.151e-07 au
i 4.721754821639628 6.2777e-06 deg
node 64.82857942801985 0.00011689 deg
peri 318.5279840126043 0.00012298 deg
M 115.0410848655405 4.2479e-05 deg
tp 2458621.160789473067
(2019-May-17.66078947)
0.00013587 TDB
period 1187.072565851661
3.25
1.8443e-05
5.049e-08
d
yr
n .3032670540589228 4.7117e-09 deg/d
Q 2.566119438170912 2.6579e-08 au
  Orbit Determination Parameters
   # obs. used (total)      65  
   data-arc span      4780 days (13.09 yr)  
   first obs. used      2006-12-26  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:37:56  

Additional Information
 Earth MOID = .829039 au 
 Jupiter MOID = 2.88631 au 
 T_jup = 3.647 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457421.5 (2016-Feb-03.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1697514601433326 5.3052e-08  
q 1.821607189966099 1.1643e-07 au
tp 2457432.462630994636
(2016-Feb-13.96263099)
0.00012289 TDB
node 64.8538547826915 0.000117 deg
peri 318.1280624152076 0.00012303 deg
i 4.720663726290282 6.2694e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      65  
   data-arc span      4780 days (13.09 yr)  
   first obs. used      2006-12-26  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:37:56  

Additional Information
 Jupiter MOID = 2.88631 au 
 T_jup = 3.647 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.814532467588735E-15 -6.094497491047768E-15 -1.908596842816999E-12 -1.069313371127067E-13 -5.577863238420028E-13 -6.446167109346511E-15
q -6.094497491047768E-15 1.355680709803668E-14 5.673557971523889E-12 2.505675061815665E-13 1.686643084506482E-12 1.58132935833848E-14
tp -1.908596842816999E-12 5.673557971523889E-12 1.51022954152935E-8 2.21784730929511E-10 4.792205970218863E-9 1.847685481224305E-11
node -1.069313371127067E-13 2.505675061815665E-13 2.21784730929511E-10 1.369010123161194E-8 -1.35693219383466E-8 3.238099604676105E-10
peri -5.577863238420028E-13 1.686643084506482E-12 4.792205970218863E-9 -1.35693219383466E-8 1.513712855613219E-8 -3.165356729912431E-10
i -6.446167109346511E-15 1.58132935833848E-14 1.847685481224305E-11 3.238099604676105E-10 -3.165356729912431E-10 3.930586681819621E-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 18.4   n/a MPO402743  

441861 (2009 WF219)          Discovered 2009-Nov-16 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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