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312223 (2007 WK55)
Classification: Main-belt Asteroid          SPK-ID: 2312223
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 .1238527842376853 5.7397e-08  
a 2.417561700025114 1.8969e-08 au
q 2.118139952410611 1.3269e-07 au
i 2.388245130471884 9.3552e-06 deg
node 3.895041466465296 0.00010361 deg
peri 113.7409809819845 0.00011432 deg
M 76.2023995070832 4.5772e-05 deg
tp 2458709.876369876448
(2019-Aug-14.37636988)
0.00017319 TDB
period 1372.981789566266
3.76
1.616e-05
4.424e-08
d
yr
n .262203040663581 3.086e-09 deg/d
Q 2.716983447639616 2.1319e-08 au
  Orbit Determination Parameters
   # obs. used (total)      160  
   data-arc span      6067 days (16.61 yr)  
   first obs. used      2003-10-16  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51626  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:48:09  

Additional Information
 Earth MOID = 1.13564 au 
 Jupiter MOID = 2.35442 au 
 T_jup = 3.504 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.7   n/a MPO460289  

312223 (2007 WK55)          Discovered 2007-Nov-30 by Ferrando, R. at Pla D'Arguines
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ show close-approach data ]
Alternate Designations
 2007 WK55 = 2003 US298 = 2005 EM126 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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