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305207 (2007 WS20)
Classification: Main-belt Asteroid          SPK-ID: 2305207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01185790201280491 6.9857e-08  
a 3.00326874530605 4.558e-08 au
q 2.967656278806092 1.9877e-07 au
i 10.61208951425817 6.5354e-06 deg
node 112.1638636293257 4.4039e-05 deg
peri 31.95059658121053 0.00032593 deg
M 122.575846363016 0.00032249 deg
tp 2458353.220099439784
(2018-Aug-22.72009944)
0.0017013 TDB
period 1901.033287680284
5.20
4.3278e-05
1.185e-07
d
yr
n .1893706976795163 4.3111e-09 deg/d
Q 3.038881211806009 4.6121e-08 au
  Orbit Determination Parameters
   # obs. used (total)      177  
   data-arc span      4217 days (11.55 yr)  
   first obs. used      2007-11-09  
   last obs. used      2019-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53815  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:54:25  

Additional Information
 Earth MOID = 1.98598 au 
 Jupiter MOID = 2.00641 au 
 T_jup = 3.226 
[ 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 15.9   n/a MPO433966  

305207 (2007 WS20)          Discovered 2007-Nov-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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