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C/2018 E1 (ATLAS)
Classification: Comet          SPK-ID: 1003564
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2458216.5 (2018-Apr-08.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9503497184833891 5.1115e-06  
a 54.48995145204292 0.0055976 au
q 2.705441429420391 1.2699e-06 au
i 72.47953208403864 3.0538e-05 deg
node 146.8409458255449 2.7049e-05 deg
peri 299.471673424489 8.6765e-05 deg
M 359.9771575979098 4.2448e-06 deg
tp 2458225.822069353205
(2018-Apr-17.32206935)
0.00035865 TDB
period 146917.3405621825
402.24
22.638
0.06198
d
yr
n .002450357450131154 3.7758e-07 deg/d
Q 106.2744614746654 0.010917 au
  Orbit Determination Parameters
   # obs. used (total)      224  
   data-arc span      1329 days (3.64 yr)  
   first obs. used      2015-08-11  
   last obs. used      2019-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .38547  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:54:17  

Additional Information
 Earth MOID = 2.08495 au 
 Jupiter MOID = 1.53554 au 
 T_jup = 0.702 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.5   0.5 8 2 parameter fit from 188 observations, autocmod 2.8
comet total magnitude slope K1 8.5   n/a 8 autocmod 2.8
comet nuclear magnitude M2 12.8   0.1 8 from 12 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.3   C/2018 E1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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