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C/2018 M1 (Catalina)
Classification: Halley-type Comet*          SPK-ID: 1003578
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458346.5 (2018-Aug-16.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9387000324892566 1.9231e-05  
a 21.26395143727771 0.0067387 au
q 1.303479532255149 4.5321e-06 au
i 37.25702429842916 9.8989e-05 deg
node 339.4633087081097 0.00023875 deg
peri 14.13278563654424 0.00021629 deg
M .3716660462415662 0.00017889 deg
tp 2458309.524439041236
(2018-Jul-10.02443904)
0.00024303 TDB
period 35814.95291206493
98.06
17.025
0.04661
d
yr
n .01005166755025182 4.7782e-06 deg/d
Q 41.22442334230026 0.013064 au
  Orbit Determination Parameters
   # obs. used (total)      171  
   data-arc span      206 days  
   first obs. used      2018-06-25  
   last obs. used      2019-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .60336  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:54:31  

Additional Information
 Earth MOID = .309039 au 
 Jupiter MOID = 2.13443 au 
 T_jup = 1.354 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 16.5   0.5 7 2 parameter fit from 94 observations, autocmod 2.8
comet total magnitude slope K1 6.25   n/a 7 autocmod 2.8
comet nuclear magnitude M2 18.1   0.4 7 from 28 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 7 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 7 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.5   C/2018 M1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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