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C/2018 E1 (ATLAS)
Classification: Comet          SPK-ID: 1003564
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.


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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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