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JPL Small-Body Database Browser
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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9387011723601153 1.9231e-05  
a 21.26435270732251 0.006739 au
q 1.303479891479878 4.5321e-06 au
i 37.25702358922189 9.8989e-05 deg
node 339.463319054704 0.00023875 deg
peri 14.13280481613599 0.00021629 deg
M .3716552984763011 0.00017889 deg
tp 2458309.524461674984
(2018-Jul-10.02446167)
0.00024303 TDB
period 35815.96670780293
98.06
17.026
0.04661
d
yr
n .01005138303084165 4.7781e-06 deg/d
Q 41.22522552316514 0.013065 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      .6043  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Oct-09 09:50:27  

Additional Information
 Earth MOID = .309039 au 
 Jupiter MOID = 2.13443 au 
 T_jup = 1.354 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 3.698330338208948E-10 7.983821899229359E-11 4.22154562169358E-9 4.239030517719019E-9 3.670337576071108E-9 1.765500372081176E-9
q 7.983821899229359E-11 2.053958101065372E-11 1.010273029158085E-9 1.043173766885089E-9 9.076866086621161E-10 4.01424550731894E-10
tp 4.22154562169358E-9 1.010273029158085E-9 5.90634080404916E-8 5.095302815387914E-8 5.104195369072636E-8 2.035519880870617E-8
node 4.239030517719019E-9 1.043173766885089E-9 5.095302815387914E-8 5.700162969039539E-8 4.334919500233467E-8 2.199516594265573E-8
peri 3.670337576071108E-9 9.076866086621161E-10 5.104195369072636E-8 4.334919500233467E-8 4.67826347635148E-8 1.728509554371846E-8
i 1.765500372081176E-9 4.01424550731894E-10 2.035519880870617E-8 2.199516594265573E-8 1.728509554371846E-8 9.798763873882574E-9

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 15.1   0.8 6 from 91 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 15.   n/a 6 autocmod 2.8
comet nuclear magnitude M2 18.1   0.4 6 from 28 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 6 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 6 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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