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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 2459021.5 (2020-Jun-21.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000395671110383 0.0001386  
a -8480.49329770105 2970.5 au
q 3.355486199696683 9.9411e-05 au
i 142.3042463028257 0.00010202 deg
node 226.549860151052 0.00098695 deg
peri 341.6993690639379 0.004421 deg
M -.0003804761085639808 0.00019988 deg
tp 2459322.977558892632
(2021-Apr-18.47755889)
0.019668 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.262037910753693E-6 6.6308e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      117 days  
   first obs. used      2020-05-01  
   last obs. used      2020-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .41477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-02 22:14:17  

Additional Information
 Earth MOID = 2.36424 au 
 Jupiter MOID = 1.88948 au 
 T_jup = -1.797 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.921021456840933E-8 1.044537135155572E-8 -2.661214849210467E-6 -1.137037024608652E-7 -5.41756075298839E-7 8.957858825057689E-9
q 1.044537135155572E-8 9.882568812798711E-9 -1.715687220729414E-6 -8.646532380442546E-8 -4.269692880017792E-7 7.307665588123242E-9
tp -2.661214849210467E-6 -1.715687220729414E-6 .0003868115900802754 1.723635627869861E-5 8.357042768779181E-5 -1.389238206949736E-6
node -1.137037024608652E-7 -8.646532380442546E-8 1.723635627869861E-5 9.740784697213611E-7 4.094767203098026E-6 -9.307023774896607E-8
peri -5.41756075298839E-7 -4.269692880017792E-7 8.357042768779181E-5 4.094767203098026E-6 1.954530819936205E-5 -3.487786226207913E-7
i 8.957858825057689E-9 7.307665588123242E-9 -1.389238206949736E-6 -9.307023774896607E-8 -3.487786226207913E-7 1.040892049041523E-8

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 5.1   0.4 14 2 parameter fit from 133 observations, autocmod 2.8
comet total magnitude slope K1 13.   n/a 14 autocmod 2.8
comet nuclear magnitude M2 10.0   0.2 14 from 11 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 14 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 14 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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