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C/2020 S4 (PANSTARRS)
Classification: Jupiter-family Comet          SPK-ID: 1003729
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

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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 2459131.5 (2020-Oct-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9991999683827031 0.00074291  
a 4209.011508931791 3906.5 au
q 3.367342284712027 0.0016997 au
i 20.57491307654523 0.00062278 deg
node 117.7134143310785 0.0068054 deg
peri 21.09089345967762 0.014323 deg
M 359.996918026787 0.0042921 deg
tp 2459985.376292498624
(2023-Feb-09.87629250)
0.40757 TDB
period 99739823.82464445
273072.76
1.3886e+08
3.802e+05
d
yr
n 3.609390774871698E-6 5.025e-06 deg/d
Q 8414.65567557887 7809.9 au
  Orbit Determination Parameters
   # obs. used (total)      111  
   data-arc span      92 days  
   first obs. used      2020-09-16  
   last obs. used      2020-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .33093  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-14 17:13:08  

Additional Information
 Earth MOID = 2.39156 au 
 Jupiter MOID = 1.19229 au 
 T_jup = 2.131 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.1   0.5 7 from 104 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 10.25   n/a 7 autocmod 2.8
comet nuclear magnitude M2 11.4   0.05 7 from 3 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 7 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 7 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2023.1   C/2020 S4       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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