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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 ]

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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.


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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 
[ show covariance matrix ]

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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