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C/2020 H7 (Lemmon)
Classification: Comet          SPK-ID: 1003685
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.


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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 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.903764391193297E-7 6.339227939297569E-8 -4.780260700906814E-6 2.548007973796274E-7 -4.807974610967445E-7 -1.200266750739412E-7
q 6.339227939297569E-8 2.128164564228902E-8 -1.744101292973069E-6 8.315358339292018E-8 -1.843048980095997E-7 -4.048262302800987E-8
tp -4.780260700906814E-6 -1.744101292973069E-6 .001810246027402696 2.161529853298521E-5 .0002849757753381549 5.636810375922958E-6
node 2.548007973796274E-7 8.315358339292018E-8 2.161529853298521E-5 1.389627128926364E-6 4.298076726114712E-6 -4.730486484492709E-8
peri -4.807974610967445E-7 -1.843048980095997E-7 .0002849757753381549 4.298076726114712E-6 4.557779049480721E-5 7.771800775090896E-7
i -1.200266750739412E-7 -4.048262302800987E-8 5.636810375922958E-6 -4.730486484492709E-8 7.771800775090896E-7 8.939003278450638E-8

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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