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P/2017 G2 (PANSTARRS)
Classification: Halley-type Comet*          SPK-ID: 1003514
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2457889.5 (2017-May-16.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6503128077762187 6.0253e-05  
a 8.139426123084364 0.0014842 au
q 2.846253067294269 3.1083e-05 au
i 47.90624455054665 0.00021693 deg
node 79.81962713412648 0.0010016 deg
peri 105.9391345729134 0.0027631 deg
M 358.7727768109006 0.00026265 deg
tp 2457918.414131880449
(2017-Jun-13.91413188)
0.0091893 TDB
period 8481.821048867472
23.22
2.3199
0.006352
d
yr
n .0424437155565866 1.1609e-05 deg/d
Q 13.43259917887446 0.0024493 au
  Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      130 days  
   first obs. used      2017-03-18  
   last obs. used      2017-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      5  
   norm. resid. RMS      .42631  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 11:21:02  

Additional Information
 Earth MOID = 2.19408 au 
 Jupiter MOID = .445571 au 
 T_jup = 1.913 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 3.630441896318752E-9 1.712195031813403E-9 4.218656706194406E-7 -5.832289293477657E-8 1.376548777662199E-7 1.283172395737827E-8
q 1.712195031813403E-9 9.661648716666735E-10 1.328000810413992E-7 -2.971874136829338E-8 4.790954040902696E-8 6.371440390880213E-9
tp 4.218656706194406E-7 1.328000810413992E-7 8.444413722592581E-5 -6.051691423886561E-6 2.521628668895767E-5 1.411265166799636E-6
node -5.832289293477657E-8 -2.971874136829338E-8 -6.051691423886561E-6 1.003225751554227E-6 -2.047986611401103E-6 -2.146739213626826E-7
peri 1.376548777662199E-7 4.790954040902696E-8 2.521628668895767E-5 -2.047986611401103E-6 7.63476451578647E-6 4.685897554909786E-7
i 1.283172395737827E-8 6.371440390880213E-9 1.411265166799636E-6 -2.146739213626826E-7 4.685897554909786E-7 4.705840453744577E-8

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.9   0.6 8 from 144 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 10.   n/a 8 autocmod 2.8
comet nuclear magnitude M2 15.4   0.3 8 from 4 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2017.4   P/2017 G2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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