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C/2018 K1 (Weiland)
Classification: Halley-type Comet*          SPK-ID: 1003572
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ hide orbit diagram ]

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 2458273.5 (2018-Jun-04.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9372141102807927 4.4708e-05  
a 29.92979639468568 0.021464 au
q 1.879168895755063 9.7163e-06 au
i 164.192707343459 9.3141e-05 deg
node 260.0017994169327 5.6733e-05 deg
peri 325.0029097838556 0.00089075 deg
M .3497311846673155 0.00038865 deg
tp 2458215.398689422561
(2018-Apr-06.89868942)
0.0020954 TDB
period 59807.28263559053
163.74
64.335
0.1761
d
yr
n .006019333835872502 6.475e-06 deg/d
Q 57.9804238936163 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .54802  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:43  

Additional Information
 Earth MOID = .886288 au 
 Jupiter MOID = .745421 au 
 T_jup = -1.436 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.998790925649819E-9 4.257494946050915E-10 9.235399585608657E-8 3.916640119716153E-10 3.878547102576299E-8 -3.132636964863494E-10
q 4.257494946050915E-10 9.440652757728508E-11 2.016703298108687E-8 8.891653867145296E-11 8.567094832319664E-9 -7.021955088876186E-11
tp 9.235399585608657E-8 2.016703298108687E-8 4.390613458112345E-6 1.908212397343309E-8 1.859692563891497E-6 -1.682251915060287E-8
node 3.916640119716153E-10 8.891653867145296E-11 1.908212397343309E-8 3.218643668871863E-9 1.117424680990145E-8 -1.935028036637111E-9
peri 3.878547102576299E-8 8.567094832319664E-9 1.859692563891497E-6 1.117424680990145E-8 7.934286944935286E-7 -9.043483680024542E-9
i -3.132636964863494E-10 -7.021955088876186E-11 -1.682251915060287E-8 -1.935028036637111E-9 -9.043483680024542E-9 8.675239083672062E-9

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 5 2 parameter fit from 116 observations, autocmod 2.9c
comet total magnitude slope K1 14.75   n/a 5 autocmod 2.9c
comet nuclear magnitude M2 15.6   0.4 5 from 29 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 5 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 5 autocmod 2.9c

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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