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C/2018 C2 (Lemmon)
Classification: Hyperbolic Comet          SPK-ID: 1003566
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.


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Orbital Elements at Epoch 2458258.5 (2018-May-20.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.001806866179532 4.7994e-06  
a -1082.820975251342 2.8752 au
q 1.956512598669587 1.8216e-06 au
i 34.4533950964703 4.0006e-05 deg
node 91.13971368984241 4.5897e-05 deg
peri 134.1384894272692 0.00014744 deg
M -.0003657880644488711 1.4632e-06 deg
tp 2458271.723927098882
(2018-Jun-02.22392710)
0.00026591 TDB
period n/a
n/a
n/a
n/a
d
yr
n 2.766107690353165E-5 1.1017e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      1669  
   data-arc span      272 days  
   first obs. used      2018-01-28  
   last obs. used      2018-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .27299  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-09 22:13:58  

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 10 2 parameter fit from 1053 observations, autocmod 2.8
comet total magnitude slope K1 26.5   n/a 10 autocmod 2.8
comet nuclear magnitude M2 14.8   0.4 10 from 525 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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