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C/2018 B1 (Lemmon)
Classification: Hyperbolic Comet          SPK-ID: 1003560
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.


Orbital Elements at Epoch 2458412.5 (2018-Oct-21.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.00296990247976 1.0002e-05  
a -1722.857293595447 5.7993 au
q 5.116718148521779 8.9742e-06 au
i 162.4235687682425 1.5779e-05 deg
node 133.1688342676005 0.00012333 deg
peri 68.34911227383604 0.00019183 deg
M .00281929417940469 1.4226e-05 deg
tp 2458207.944915244706
(2018-Mar-30.44491524)
0.0012933 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.378256709080279E-5 6.959e-08 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      312  
   data-arc span      1018 days (2.79 yr)  
   first obs. used      2017-01-16  
   last obs. used      2019-10-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .53726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-02 23:42:38  

Additional Information
 Earth MOID = 4.17906 au 
 Jupiter MOID = .97494 au 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.000311513974364E-10 8.019723940157664E-11 6.474539429439287E-9 -1.456620843085359E-10 6.479138971528247E-10 -3.890935502231904E-11
q 8.019723940157664E-11 8.053565513424117E-11 8.343650513928747E-9 -1.113602238664352E-10 9.472390506468989E-10 -3.358943939535944E-11
tp 6.474539429439287E-9 8.343650513928747E-9 1.672716904829271E-6 -5.228886934196377E-9 1.944443338448668E-7 -2.299851638115951E-9
node -1.456620843085359E-10 -1.113602238664352E-10 -5.228886934196377E-9 1.520958958689116E-8 1.381987345319515E-8 -6.789665646270041E-11
peri 6.479138971528247E-10 9.472390506468989E-10 1.944443338448668E-7 1.381987345319515E-8 3.679772132770843E-8 -3.622658387130824E-10
i -3.890935502231904E-11 -3.358943939535944E-11 -2.299851638115951E-9 -6.789665646270041E-11 -3.622658387130824E-10 2.489843619462683E-10

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.3   0.6 16 2 parameter fit from 269 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 16 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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