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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 2459256.5 (2021-Feb-11.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .999330694252097 0.00018448  
a 11846.50478607184 3265.5 au
q 7.928933745878593 0.00024122 au
i 75.60536932645611 0.0037304 deg
node 164.07985847 0.00080846 deg
peri 351.7603776656902 0.02296 deg
M 359.9999363892159 2.6104e-05 deg
tp 2459339.716994540122
(2021-May-05.21699454)
0.36579 TDB
period 470959734.7539384
1289417.48
1.9473e+08
5.331e+05
d
yr
n 7.643965575700194E-7 3.1606e-07 deg/d
Q 23685.0806383978 6528.8 au
  Orbit Determination Parameters
   # obs. used (total)      97  
   data-arc span      167 days  
   first obs. used      2020-11-26  
   last obs. used      2021-05-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .41936  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-31 22:42:58  

Additional Information
 Earth MOID = 6.94609 au 
 Jupiter MOID = 2.54226 au 
 T_jup = 0.868 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.1   0.6 6 from 90 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 6 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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