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C/2020 H7 (Lemmon)
Classification: Comet          SPK-ID: 1003685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458985.5 (2020-May-16.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9996839373586254 0.00043632  
a 13985.15639306742 19307 au
q 4.420185469630125 0.00014588 au
i 135.9227360914189 0.00029898 deg
node 323.5292924387012 0.0011788 deg
peri 82.76791335979969 0.0067511 deg
M 359.9999889769388 2.2833e-05 deg
tp 2459003.996907944168
(2020-Jun-03.49690794)
0.042547 TDB
period 604086900.0309105
1653899.79
1.2509e+09
3.425e+06
d
yr
n 5.959407495537135E-7 1.2341e-06 deg/d
Q 27965.89260066521 38608 au
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      80 days  
   first obs. used      2020-04-29  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .41754  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-06 07:15:26  

Additional Information
 Earth MOID = 3.74866 au 
 Jupiter MOID = 1.69358 au 
 T_jup = -1.872 
[ 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 11.2   0.6 5 from 119 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 10.   n/a 5 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.4   C/2020 H7       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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