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C/2020 J1 (SONEAR)
Classification: Hyperbolic Comet          SPK-ID: 1003683
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.


Orbital Elements at Epoch 2459091.5 (2020-Aug-30.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000443537619544 1.0201e-05  
a -7564.990519780368 173.97 au
q 3.355357887016051 1.6182e-05 au
i 142.3010469598217 3.3044e-05 deg
node 226.5648251732146 8.607e-05 deg
peri 341.7134845680607 0.00050348 deg
M -.000346733661550302 1.1958e-05 deg
tp 2459322.975224563254
(2021-Apr-18.47522456)
0.0020901 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.497929906773033E-6 5.167e-08 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      256  
   data-arc span      366 days (1.00 yr)  
   first obs. used      2020-05-01  
   last obs. used      2021-05-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .41727  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-02 23:42:47  

Additional Information
 Earth MOID = 2.36478 au 
 Jupiter MOID = 1.8903 au 
 T_jup = -1.797 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 6.5   0.4 23 2 parameter fit from 221 observations, autocmod 2.9c
comet total magnitude slope K1 10.75   n/a 23 autocmod 2.9c
comet nuclear magnitude M2 10.0   0.2 23 from 13 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 23 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 23 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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