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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456945.5 (2014-Oct-15.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01294452317619326 6.7388e-08  
q 2.9613293205802 1.9255e-07 au
tp 2456403.520398227324
(2013-Apr-21.02039823)
0.0016095 TDB
node 112.1924659339171 4.4077e-05 deg
peri 22.08534582768453 0.00030986 deg
i 10.61028007969939 6.5339e-06 deg
  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
 Jupiter MOID = 2.00641 au 
 T_jup = 3.226 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.54115880389392E-15 -1.264355974644234E-14 2.262485372855775E-11 8.29714784130489E-15 4.261529165489411E-12 -4.596607660876671E-15
q -1.264355974644234E-14 3.707581874023914E-14 -5.777342746561461E-11 -1.072409345012112E-14 -1.078849201374376E-11 1.764961148996752E-14
tp 2.262485372855775E-11 -5.777342746561461E-11 2.590455536620547E-6 -1.33235511389117E-10 4.937406437064936E-7 -1.325221239764305E-10
node 8.29714784130489E-15 -1.072409345012112E-14 -1.33235511389117E-10 1.942816008649258E-9 -1.933600127265797E-9 2.887483071275568E-11
peri 4.261529165489411E-12 -1.078849201374376E-11 4.937406437064936E-7 -1.933600127265797E-9 9.601238928441391E-8 -5.331768776267043E-11
i -4.596607660876671E-15 1.764961148996752E-14 -1.325221239764305E-10 2.887483071275568E-11 -5.331768776267043E-11 4.269155933864661E-11

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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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