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442505 (2011 WP21)
Classification: Main-belt Asteroid          SPK-ID: 2442505
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02757173108556177 7.5078e-08  
a 2.689607438216259 3.6641e-08 au
q 2.615450305204034 2.2406e-07 au
i 5.150026819020779 5.4638e-06 deg
node 247.741737860039 8.6066e-05 deg
peri 128.5652393437534 0.00015783 deg
M 66.74312406234162 0.00013152 deg
tp 2458901.799600977004
(2020-Feb-22.29960098)
0.00058774 TDB
period 1611.134407610856
4.41
3.2923e-05
9.014e-08
d
yr
n .2234450448698705 4.566e-09 deg/d
Q 2.763764571228485 3.7651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      136  
   data-arc span      5145 days (14.09 yr)  
   first obs. used      2006-10-11  
   last obs. used      2020-11-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56522  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:44:29  

Additional Information
 Earth MOID = 1.61899 au 
 Jupiter MOID = 2.36137 au 
 T_jup = 3.366 
[ 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 17.1   n/a MPO456095  

442505 (2011 WP21)          Discovered 2006-Oct-11 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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