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C/2020 H8 (PANSTARRS)
Classification: Comet          SPK-ID: 1003686
[ 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 2458997.5 (2020-May-28.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9923338908325889 0.00011168  
a 609.7630197166513 8.8904 au
q 4.674509875398073 5.8777e-05 au
i 99.646851365427 0.00056282 deg
node 68.40666762107332 0.00071221 deg
peri 128.8936068536655 0.0032211 deg
M 359.9995298803311 9.821e-06 deg
tp 2459004.682009429369
(2020-Jun-04.18200943)		 0.024026 TDB
period 5499713.297770854
15057.39		 1.2028e+05
329.3		 d
yr
n 6.545795762588485E-5 1.4316e-06 deg/d
Q 1214.851529557905 17.713 au
   Orbit Determination Parameters
   # obs. used (total)      180  
   data-arc span      131 days  
   first obs. used      2020-04-30  
   last obs. used      2020-09-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .35557  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-24 20:18:33  

Additional Information
 Earth MOID = 3.97243 au 
 Jupiter MOID = .326438 au 
 T_jup = -0.440 
[ 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 10.4   0.4 12 from 132 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 10.   n/a 12 autocmod 2.8
comet nuclear magnitude M2 13.7   0.6 12 from 4 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 12 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 12 autocmod 2.8

Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 2020.4   C/2020 H8       
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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