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442504 (2011 WA20)
Classification: Main-belt Asteroid          SPK-ID: 2442504
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04871755410470066 1.3145e-07  
a 3.184249752613886 2.2708e-07 au
q 3.029120893008039 3.0138e-07 au
i 8.459541161063001 9.4877e-06 deg
node 248.7223357016688 5.6118e-05 deg
peri 350.3135221342143 0.00015195 deg
M 9.428248953886564 0.00010899 deg
tp 2458946.145231135668
(2020-Apr-06.64523114)
0.00063151 TDB
period 2075.434885827169
5.68
0.00022201
6.078e-07
d
yr
n .1734576220426792 1.8555e-08 deg/d
Q 3.339378612219733 2.3814e-07 au
  Orbit Determination Parameters
   # obs. used (total)      69  
   data-arc span      4024 days (11.02 yr)  
   first obs. used      2005-10-27  
   last obs. used      2016-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64605  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:28:00  

Additional Information
 Earth MOID = 2.01679 au 
 Jupiter MOID = 1.68513 au 
 T_jup = 3.180 
[ 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 16.4   n/a MPO392192  

442504 (2011 WA20)          Discovered 2011-Nov-17 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2011 WA20 = 2011 WV156 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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