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C/2018 B1 (Lemmon)
Classification: Hyperbolic Comet          SPK-ID: 1003560
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458407.5 (2018-Oct-16.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.002974751544985 1.0072e-05  
a -1720.050633135112 5.8212 au
q 5.116723278371006 9.0178e-06 au
i 162.4235707741443 1.5835e-05 deg
node 133.168647808127 0.00012471 deg
peri 68.34928855443937 0.0001931 deg
M .002757072631468296 1.3988e-05 deg
tp 2458207.948047980774
(2018-Mar-30.44804798)
0.0012976 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.381631501756828E-5 7.0138e-08 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      309  
   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      .53532  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:40  

Additional Information
 Earth MOID = 4.17895 au 
 Jupiter MOID = .974959 au 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.014490579603763E-10 8.125282349990284E-11 6.349310147388165E-9 -1.47616280394209E-10 6.325045881788267E-10 -3.959196779942173E-11
q 8.125282349990284E-11 8.13216180584776E-11 8.25022625850221E-9 -1.132088266354758E-10 9.353693679678422E-10 -3.41231376170114E-11
tp 6.349310147388165E-9 8.25022625850221E-9 1.683732406213128E-6 -4.986164310757263E-9 1.958662641296256E-7 -2.235068520183991E-9
node -1.47616280394209E-10 -1.132088266354758E-10 -4.986164310757263E-9 1.55529108127226E-8 1.417220524403596E-8 -4.490238175297027E-11
peri 6.325045881788267E-10 9.353693679678422E-10 1.958662641296256E-7 1.417220524403596E-8 3.728612869649407E-8 -3.334161270175458E-10
i -3.959196779942173E-11 -3.41231376170114E-11 -2.235068520183991E-9 -4.490238175297027E-11 -3.334161270175458E-10 2.507383883682069E-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 15 2 parameter fit from 265 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 15 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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