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C/2020 M3 (ATLAS)
Classification: Halley-type Comet* [NEO]          SPK-ID: 1003699
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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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 2459128.5 (2020-Oct-06.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9527205336437549 5.5604e-06  
a 26.82448764696919 0.0031793 au
q 1.268247461228393 1.1767e-06 au
i 23.4732810667899 4.8451e-05 deg
node 71.2506750590755 5.2927e-05 deg
peri 328.4438813536366 8.1592e-05 deg
M 359.8607976936555 2.4857e-05 deg
tp 2459148.121830073204
(2020-Oct-25.62183007)
5.7938e-05 TDB
period 50745.27148186618
138.93
9.0217
0.0247
d
yr
n .007094257050701679 1.2612e-06 deg/d
Q 52.38072783270997 0.0062083 au
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      142 days  
   first obs. used      2020-06-27  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .44757  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-17 00:12:34  

Additional Information
 Earth MOID = .327392 au 
 Jupiter MOID = .886233 au 
 T_jup = 1.460 
[ 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 14.2   0.8 13 2 parameter fit from 883 observations, autocmod 2.8
comet total magnitude slope K1 11.5   n/a 13 autocmod 2.8
comet nuclear magnitude M2 15.8   0.4 13 from 49 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 13 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 13 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.8   C/2020 M3       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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