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JPL Small-Body Database Browser
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442521 (2011 WK91)
Classification: Main-belt Asteroid          SPK-ID: 2442521
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2830343903898047 7.4144e-08  
a 2.728110077965972 4.6775e-08 au
q 1.955961105132591 2.1388e-07 au
i 10.43659002204298 6.9598e-06 deg
node 64.60094458325223 9.0846e-05 deg
peri 333.5688076436875 9.6024e-05 deg
M 340.8089685275326 3.6598e-05 deg
tp 2459088.237868333323
(2020-Aug-26.73786833)
0.00016864 TDB
period 1645.853827362576
4.51
4.2328e-05
1.159e-07
d
yr
n .2187314535561689 5.6254e-09 deg/d
Q 3.500259050799354 6.0013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      93  
   data-arc span      5191 days (14.21 yr)  
   first obs. used      2002-12-11  
   last obs. used      2017-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67167  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:27:50  

Additional Information
 Earth MOID = .970309 au 
 Jupiter MOID = 1.93565 au 
 T_jup = 3.273 
[ 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 16.6   n/a MPO349190  

442521 (2011 WK91)          Discovered 2002-Dec-11 by LINEAR at Socorro
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2011 WK91 = 2002 XD78 = 2006 QF54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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