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C/2020 R4 (ATLAS)
Classification: Comet          SPK-ID: 1003720
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2459147.5 (2020-Oct-25.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9892343597016735 2.8633e-05  
a 95.51960025866744 0.25879 au
q 1.028329657824748 5.1422e-05 au
i 164.4624994984236 7.559e-05 deg
node 323.2765374310146 0.00060155 deg
peri 46.73432211502134 0.0037009 deg
M 359.8649190476937 0.00054985 deg
tp 2459275.446610207491
(2021-Mar-01.94661021)		 0.00084597 TDB
period 340986.4891258478
933.57		 1385.8
3.794		 d
yr
n .001055760305702713 4.2906e-06 deg/d
Q 190.0108708595101 0.5148 au
   Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      127 days  
   first obs. used      2020-08-29  
   last obs. used      2021-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .58477  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-14 17:13:08  

Additional Information
 Earth MOID = .118375 au 
 Jupiter MOID = .0223556 au 
 T_jup = -1.154 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.3   0.7 6 2 parameter fit from 341 observations, autocmod 2.8
comet total magnitude slope K1 14.   n/a 6 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 2021.2   C/2020 R4       
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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