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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 2459049.5 (2020-Jul-19.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000368031806169 2.452e-05  
a -9117.106132745794 607.37 au
q 3.355385037068498 3.656e-05 au
i 142.3032120717477 4.9813e-05 deg
node 226.55591897 0.00023261 deg
peri 341.7066127807454 0.0012375 deg
M -.0003096339861484148 3.0937e-05 deg
tp 2459322.982830181506
(2021-Apr-18.48283018)
0.0045766 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.132188027829447E-6 1.1314e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      268 days  
   first obs. used      2020-05-01  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .39074  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-30 21:12:47  

Additional Information
 Earth MOID = 2.36396 au 
 Jupiter MOID = 1.88994 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 5.1   0.5 19 2 parameter fit from 192 observations, autocmod 2.8
comet total magnitude slope K1 13.   n/a 19 autocmod 2.8
comet nuclear magnitude M2 10.0   0.2 19 from 11 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 19 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 19 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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