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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 2458984.5 (2020-May-15.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9996903483955321 0.00069876  
a 14274.72537237414 32213 au
q 4.420191614894895 0.00022847 au
i 135.92269104 0.00049563 deg
node 323.5289591588111 0.0015811 deg
peri 82.76526001851457 0.0099709 deg
M 359.9999887420607 3.811e-05 deg
tp 2459003.980785830047
(2020-Jun-03.48078583)
0.061213 TDB
period 622945523.6819844
1705531.89
2.1087e+09
5.773e+06
d
yr
n 5.778996498316297E-7 1.9562e-06 deg/d
Q 28545.03055313339 64416 au
  Orbit Determination Parameters
   # obs. used (total)      161  
   data-arc span      55 days  
   first obs. used      2020-04-29  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .41967  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-26 16:17:47  

Additional Information
 Earth MOID = 3.74866 au 
 Jupiter MOID = 1.69346 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 11.1   0.5 4 from 117 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 10.   n/a 4 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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