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JPL Small-Body Database Browser
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441856 (2009 WD101)
Classification: Main-belt Asteroid          SPK-ID: 2441856
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05645809446415456 6.4995e-08  
a 2.377898272989926 2.7142e-08 au
q 2.243646667667311 1.55e-07 au
i 7.585336663536865 6.7259e-06 deg
node 77.0780676197583 5.0673e-05 deg
peri 75.11734838770033 7.6792e-05 deg
M 226.9693131740222 5.9467e-05 deg
tp 2459495.423034024259
(2021-Oct-07.92303402)
0.00022429 TDB
period 1339.332273626512
3.67
2.2931e-05
6.278e-08
d
yr
n .2687906556789135 4.602e-09 deg/d
Q 2.512149878312542 2.8674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      95  
   data-arc span      3594 days (9.84 yr)  
   first obs. used      2009-10-25  
   last obs. used      2019-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64839  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:42:29  

Additional Information
 Earth MOID = 1.26879 au 
 Jupiter MOID = 2.49352 au 
 T_jup = 3.526 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.4   n/a MPO437717  

441856 (2009 WD101)          Discovered 2009-Oct-25 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2009 WD101 = 2011 HC17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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