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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 2459045.5 (2020-Jul-15.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000430054525629 5.4876e-05  
a -7802.414622507355 995.5 au
q 3.35546371924359 5.829e-05 au
i 142.3034091461101 5.5771e-05 deg
node 226.5546387379034 0.00036255 deg
peri 341.7029785374598 0.0022129 deg
M -.0003968068957667175 7.593e-05 deg
tp 2459322.971686949401
(2021-Apr-18.47168695)
0.0090046 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.430080669236275E-6 2.7369e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      215  
   data-arc span      185 days  
   first obs. used      2020-05-01  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .38517  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-17 00:12:33  

Additional Information
 Earth MOID = 2.36448 au 
 Jupiter MOID = 1.88976 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 5.3   0.5 18 2 parameter fit from 189 observations, autocmod 2.8
comet total magnitude slope K1 12.75   n/a 18 autocmod 2.8
comet nuclear magnitude M2 10.0   0.2 18 from 11 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 18 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 18 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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