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C/1981 M1 (Gonzalez)
Classification: Comet          SPK-ID: 1001190
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2444823.5 (1981-Aug-07.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9993513433653151 0.00035135  
a 3597.566450393846 1948.7 au
q 2.333585346767921 7.6813e-05 au
i 107.1448678549008 0.0017757 deg
node 143.9687850172899 0.0022464 deg
peri 181.6119223773757 0.0041062 deg
M .0006136407146167883 0.00049863 deg
tp 2444689.154436313448
(1981-Mar-25.65443631)
0.012149 TDB
period 78815505.18915899
215785.09
6.4038e+07
1.753e+05
d
yr
n 4.567629163018011E-6 3.7112e-06 deg/d
Q 7192.799315440924 3896.1 au
  Orbit Determination Parameters
   # obs. used (total)      20  
   data-arc span      151 days  
   first obs. used      1981-06-29  
   last obs. used      1981-11-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .65633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:29  

Additional Information
 Earth MOID = 1.32138 au 
 Jupiter MOID = 2.71235 au 
 T_jup = -0.557 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.234459307791527E-7 1.070719331018396E-8 3.806092571613822E-6 7.11154246611752E-7 8.951086709184253E-7 5.588387598240069E-7
q 1.070719331018396E-8 5.900171419608104E-9 6.210798015505555E-7 9.902638374175918E-8 2.963938154263884E-7 7.067398048181813E-8
tp 3.806092571613822E-6 6.210798015505555E-7 .0001475967107903163 2.271244179252162E-5 4.340217280304564E-5 1.756332021866828E-5
node 7.11154246611752E-7 9.902638374175918E-8 2.271244179252162E-5 5.046476044667395E-6 6.637498845048376E-6 3.957103026283043E-6
peri 8.951086709184253E-7 2.963938154263884E-7 4.340217280304564E-5 6.637498845048376E-6 1.686086212784058E-5 4.948741662047975E-6
i 5.588387598240069E-7 7.067398048181813E-8 1.756332021866828E-5 3.957103026283043E-6 4.948741662047975E-6 3.153213672927749E-6

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet nuclear magnitude M2 12.5   0.4 2 from 3 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 2 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 2 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1981.2   C/1981 M1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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