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442520 (2011 WU87)
Classification: Main-belt Asteroid          SPK-ID: 2442520
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08718357442678694 9.5578e-08  
a 2.975645295421612 6.2695e-08 au
q 2.716217902340503 2.4811e-07 au
i 6.351601098122174 8.2476e-06 deg
node 81.76206090444892 6.9446e-05 deg
peri 66.91171041997752 8.5113e-05 deg
M 163.3081790028928 5.0479e-05 deg
tp 2458149.997482110030
(2018-Jan-31.49748211)
0.00025556 TDB
period 1874.865718972751
5.13
5.9253e-05
1.622e-07
d
yr
n .1920137513620154 6.0684e-09 deg/d
Q 3.23507268850272 6.8161e-08 au
  Orbit Determination Parameters
   # obs. used (total)      111  
   data-arc span      4582 days (12.54 yr)  
   first obs. used      2006-12-13  
   last obs. used      2019-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59873  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:20  

Additional Information
 Earth MOID = 1.73586 au 
 Jupiter MOID = 1.79391 au 
 T_jup = 3.246 
[ 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 17.0   n/a MPO437721  

442520 (2011 WU87)          Discovered 2006-Dec-13 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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