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C/2018 W1 (Catalina)
Classification: Halley-type Comet*          SPK-ID: 1003598
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458509.5 (2019-Jan-26.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .937663286002328 1.8978e-06  
a 21.81983829845831 0.00065748 au
q 1.360177019486447 8.0525e-07 au
i 83.27887865438332 6.2079e-05 deg
node 233.5895787467877 2.3443e-05 deg
peri 251.2480655704364 4.3322e-05 deg
M 358.9764013679579 4.6363e-05 deg
tp 2458615.352937527020
(2019-May-11.85293753)
0.00010072 TDB
period 37228.515471636
101.93
1.6827
0.004607
d
yr
n .00967000686004469 4.3707e-07 deg/d
Q 42.27949957743018 0.001274 au
  Orbit Determination Parameters
   # obs. used (total)      287  
   data-arc span      552 days (1.51 yr)  
   first obs. used      2018-11-16  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .45667  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:48  

Additional Information
 Earth MOID = .804903 au 
 Jupiter MOID = .99147 au 
 T_jup = 0.405 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.0   0.6 12 2 parameter fit from 235 observations, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 12 autocmod 2.9c
comet nuclear magnitude M2 15.8   0.4 12 from 7 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 12 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 12 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2019.4   C/2018 W1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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