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C/2021 C1 (Rankin)
Classification: Comet          SPK-ID: 1003764
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459281.5 (2021-Mar-08.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9999157579398753 0.000395  
a 41327.13338821661 1.9378e+05 au
q 3.48148285567144 0.0001718 au
i 143.0399691891417 0.0019673 deg
node 186.8919346927668 5.1797e-05 deg
peri 336.3163921793821 0.0068385 deg
M 1.065716109477325E-5 7.496e-05 deg
tp 2459190.657227626132
(2020-Dec-07.15722763)
0.036551 TDB
period 3068678212.120834
8401583.06
2.1583e+10
5.909e+07
d
yr
n 1.173143533193061E-7 8.2512e-07 deg/d
Q 82650.78529357754 3.8754e+05 au
  Orbit Determination Parameters
   # obs. used (total)      149  
   data-arc span      91 days  
   first obs. used      2021-02-11  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .52399  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-31 22:42:58  

Additional Information
 Earth MOID = 2.51159 au 
 Jupiter MOID = 1.64987 au 
 T_jup = -1.849 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.560254457162541E-7 6.70400017952316E-8 1.394820067673499E-5 -1.189630521685882E-8 2.570079846504159E-6 7.706872365944816E-7
q 6.70400017952316E-8 2.951660301710672E-8 6.239978991672418E-6 -4.919760602597181E-9 1.159504770045233E-6 3.335832481437344E-7
tp 1.394820067673499E-5 6.239978991672418E-6 .001335952661522215 -9.932453258650035E-7 .0002496105550064953 6.964430354742877E-5
node -1.189630521685882E-8 -4.919760602597181E-9 -9.932453258650035E-7 2.682957701946395E-9 -1.789405887497637E-7 -6.475903453887672E-8
peri 2.570079846504159E-6 1.159504770045233E-6 .0002496105550064953 -1.789405887497637E-7 4.676469002583741E-5 1.285858402678226E-5
i 7.706872365944816E-7 3.335832481437344E-7 6.964430354742877E-5 -6.475903453887672E-8 1.285858402678226E-5 3.870422727566916E-6

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.7   0.5 6 2 parameter fit from 141 observations, autocmod 2.9c
comet total magnitude slope K1 4.75   n/a 6 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.9   C/2021 C1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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