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C/2020 K8 (Catalina-ATLAS)
Classification: Hyperbolic Comet          SPK-ID: 1003696
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.


Orbital Elements at Epoch 2459041.5 (2020-Jul-11.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000156901957255 1.402e-05  
a -3024.697413243876 270.23 au
q .4745809442418851 1.2804e-05 au
i 31.41376539450032 0.0003611 deg
node 181.5171401839727 0.00069642 deg
peri 260.0635461391266 0.0017724 deg
M -.0003881960364056408 5.2022e-05 deg
tp 2459107.019402050882
(2020-Sep-14.51940205)
0.00030004 TDB
period n/a
n/a
n/a
n/a
d
yr
n 5.924902002374351E-6 7.94e-07 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.4470933337182E-9 1.833E-8
A2 [EST] 2.216054661244701E-9 3.875E-9
  Orbit Determination Parameters
   # obs. used (total)      289  
   data-arc span      263 days  
   first obs. used      2020-05-25  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .65375  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:34:07  

Additional Information
 Earth MOID = .060276 au 
 Jupiter MOID = 1.86934 au 
 T_jup = 0.729 
[ 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 16.8   0.9 17 2 parameter fit from 250 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 17 autocmod 2.9c
comet nuclear magnitude M2 17.2   0.08 17 from 3 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 17 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 17 autocmod 2.9c

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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