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JPL Small-Body Database Browser
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C/2018 A3 (ATLAS)
Classification: Comet          SPK-ID: 1003556
Ephemeris | Orbit Diagram | Orbital Elements | 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 2458426.5 (2018-Nov-04.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9933712580831141 2.651e-06  
a 494.3199056804652 0.19783 au
q 3.276719079135181 1.0377e-06 au
i 139.561891756887 1.0357e-05 deg
node 194.278847696157 1.5077e-05 deg
peri 86.4258004012971 3.2994e-05 deg
M 359.9937347336879 3.7649e-06 deg
tp 2458496.363061158052
(2019-Jan-12.86306116)
0.00016979 TDB
period 4014306.936710558
10990.57
2409.8
6.598
d
yr
n 8.967924119300022E-5 5.3835e-08 deg/d
Q 985.3630922817953 0.39434 au
  Orbit Determination Parameters
   # obs. used (total)      1471  
   data-arc span      721 days (1.97 yr)  
   first obs. used      2018-01-10  
   last obs. used      2020-01-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .49648  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-05 13:15:48  

Additional Information
 Earth MOID = 2.60474 au 
 Jupiter MOID = .288397 au 
 T_jup = -1.695 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.8   0.6 22 2 parameter fit from 748 observations, autocmod 2.8
comet total magnitude slope K1 6.5   n/a 22 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2019.0   C/2018 A3       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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