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C/2018 C2 (Lemmon)
Classification: Hyperbolic Comet          SPK-ID: 1003566
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458258.5 (2018-May-20.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.00180655729515 4.7958e-06  
a -1083.00606097916 2.8741 au
q 1.95651250015357 1.8208e-06 au
i 34.45339329783236 3.9994e-05 deg
node 91.13971556097802 4.5884e-05 deg
peri 134.1384875107038 0.00014738 deg
M -.0003656942097377445 1.462e-06 deg
tp 2458271.723923882301
(2018-Jun-02.22392388)
0.00026577 TDB
period n/a
n/a
n/a
n/a
d
yr
n 2.765398628974207E-5 1.1008e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      1672  
   data-arc span      272 days  
   first obs. used      2018-01-28  
   last obs. used      2018-10-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .27461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:41  

Additional Information
 Earth MOID = 1.06202 au 
 Jupiter MOID = 1.40517 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.6   0.6 12 2 parameter fit from 1056 observations, autocmod 2.9c
comet total magnitude slope K1 26.5   n/a 12 autocmod 2.9c
comet nuclear magnitude M2 14.8   0.4 12 from 525 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 12 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 12 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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