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C/2020 J1 (SONEAR)
Classification: Hyperbolic Comet          SPK-ID: 1003683
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458993.5 (2020-May-24.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000074348353916 0.00069287  
a -45130.18449461467 4.2058e+05 au
q 3.355354929102919 0.00027259 au
i 142.3046042235628 0.00050788 deg
node 226.5482679821901 0.0052799 deg
peri 341.7048052978408 0.015468 deg
M -3.387564234187302E-5 0.00047353 deg
tp 2459323.021782696398
(2021-Apr-18.52178270)
0.084498 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.028024371095493E-7 1.4371e-06 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      96  
   data-arc span      70 days  
   first obs. used      2020-05-01  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .44012  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-20 08:42:42  

Additional Information
 Earth MOID = 2.36421 au 
 Jupiter MOID = 1.8895 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 6.4   0.3 9 from 83 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 11.   n/a 9 autocmod 2.8
comet nuclear magnitude M2 9.6   0.05 9 from 3 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 9 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 9 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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