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JPL Small-Body Database Browser
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C/2019 Y4 (ATLAS)
Classification: Comet          SPK-ID: 1003655
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 2458908.5 (2020-Feb-29.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9992445841186592 3.7798e-06  
a 334.6992523709083 1.6722 au
q .252837130713863 2.0106e-06 au
i 45.38415667539778 0.0010739 deg
node 120.5723476981771 0.0010028 deg
peri 177.4076145113976 0.00067807 deg
M 359.9851890642192 0.00011099 deg
tp 2459000.515404234206
(2020-May-31.01540423)
0.00022098 TDB
period 2236559.932101796
6123.37
16761
45.89
d
yr
n .0001609614814397984 1.2063e-06 deg/d
Q 669.1456676111027 3.3432 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 3.488994568126699E-7 1.857E-8
A2 [EST] -3.904709945538267E-9 1.139E-8
  Orbit Determination Parameters
   # obs. used (total)      1263  
   data-arc span      102 days  
   first obs. used      2019-12-28  
   last obs. used      2020-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .40873  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Apr-08 15:48:18  

Additional Information
 Earth MOID = .631177 au 
 Jupiter MOID = 1.39375 au 
 T_jup = 0.453 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 9.9   0.9 11 2 parameter fit from 1355 observations, autocmod 2.8
comet total magnitude slope K1 15.25   n/a 11 autocmod 2.8
comet nuclear magnitude M2 13.1   0.7 11 from 403 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 11 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 11 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.4   C/2019 Y4       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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