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C/2021 A6 (PANSTARRS)
Classification: Comet          SPK-ID: 1003758
Ephemeris | Orbit Diagram | Orbital Elements | 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.


Orbital Elements at Epoch 2459240.5 (2021-Jan-26.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9989852538263428 0.00036817  
a 7813.898243878875 2835 au
q 7.929123344322452 0.00031131 au
i 75.59782993179613 0.007064 deg
node 164.0815538176246 0.0015491 deg
peri 351.6761862533687 0.075092 deg
M 359.9998603341984 7.445e-05 deg
tp 2459338.378573503879
(2021-May-03.87857350)
1.1944 TDB
period 252290009.9503375
690732.40
1.373e+08
3.759e+05
d
yr
n 1.426929271083167E-6 7.7658e-07 deg/d
Q 15619.86736441343 5667.2 au
  Orbit Determination Parameters
   # obs. used (total)      77  
   data-arc span      109 days  
   first obs. used      2020-11-26  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .43592  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:34:17  

Additional Information
 Earth MOID = 6.94685 au 
 Jupiter MOID = 2.54327 au 
 T_jup = 0.869 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 6.9   0.5 4 from 70 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 4 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2021.3   C/2021 A6       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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