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C/2019 S4 (Lemmon)
Classification: Comet          SPK-ID: 1003665
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458874.5 (2020-Jan-26.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9858425095157991 7.594e-06  
a 243.1036632356092 0.1307 au
q 3.441737798932516 4.3905e-06 au
i 92.02543814527817 2.6465e-05 deg
node 63.16984437353722 2.8571e-05 deg
peri 71.35360958810287 0.00018154 deg
M 359.9810357195097 1.5218e-05 deg
tp 2458947.432239735898
(2020-Apr-07.93223974)
0.00093842 TDB
period 1384476.796699948
3790.49
1116.5
3.057
d
yr
n .0002600260263357966 2.097e-07 deg/d
Q 482.7655886722858 0.25955 au
  Orbit Determination Parameters
   # obs. used (total)      241  
   data-arc span      562 days (1.54 yr)  
   first obs. used      2019-09-17  
   last obs. used      2021-04-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .55563  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-02 23:42:44  

Additional Information
 Earth MOID = 3.01194 au 
 Jupiter MOID = .168874 au 
 T_jup = -0.060 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.302   .57935 7 autocmod 2.8
comet total magnitude M1 5.9   01. 18 2 parameter fit from 217 observations, autocmod 2.9c
comet total magnitude slope K1 18.25   n/a 18 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.3   C/2019 S4       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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