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C/2018 K1 (Weiland)
Classification: Halley-type Comet*          SPK-ID: 1003572
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 2458273.5 (2018-Jun-04.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9372141034491438 4.4708e-05  
a 29.92979311858918 0.021464 au
q 1.879168894532268 9.7163e-06 au
i 164.1927073415578 9.3141e-05 deg
node 260.0017994993891 5.6733e-05 deg
peri 325.0029097328154 0.00089075 deg
M .3497312437579611 0.00038865 deg
tp 2458215.398689145353
(2018-Apr-06.89868915)
0.0020954 TDB
period 59807.27281589004
163.74
64.335
0.1761
d
yr
n .006019334824181326 6.475e-06 deg/d
Q 57.98041734264609 0.04158 au
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      251 days  
   first obs. used      2017-11-06  
   last obs. used      2018-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .54802  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:54:31  

Additional Information
 Earth MOID = .886288 au 
 Jupiter MOID = .745421 au 
 T_jup = -1.436 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.5   0.7 4 2 parameter fit from 116 observations, autocmod 2.8
comet total magnitude slope K1 14.75   n/a 4 autocmod 2.8
comet nuclear magnitude M2 15.6   0.4 4 from 29 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 4 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 4 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.3   C/2018 K1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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