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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 2457890.5 (2017-May-17.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6503124287968035 6.1342e-05  
a 8.139414410014425 0.0015111 au
q 2.846252056054243 3.1657e-05 au
i 47.9062493137032 0.00022079 deg
node 79.81957070192165 0.001018 deg
peri 105.9390524394801 0.0028025 deg
M 358.8152360037728 0.00026529 deg
tp 2457918.413706971304
(2017-Jun-13.91370697)
0.0093207 TDB
period 8481.802740182206
23.22
2.362
0.006467
d
yr
n .04244380717491981 1.182e-05 deg/d
Q 13.43257676397461 0.0024938 au
  Orbit Determination Parameters
   # obs. used (total)      160  
   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      .42502  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Jan-29 07:46:41  

Additional Information
 Earth MOID = 2.19408 au 
 Jupiter MOID = .445562 au 
 T_jup = 1.913 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 3.762880322349897E-9 1.777341179902144E-9 4.351029035285858E-7 -6.037442341691841E-8 1.420586098012407E-7 1.329900562911537E-8
q 1.777341179902144E-9 1.002166734866731E-9 1.373315588331324E-7 -3.078923438601131E-8 4.957448981247255E-8 6.606263923838027E-9
tp 4.351029035285858E-7 1.373315588331324E-7 8.687592873266953E-5 -6.228062430067809E-6 2.593989253451343E-5 1.456211885655868E-6
node -6.037442341691841E-8 -3.078923438601131E-8 -6.228062430067809E-6 1.036379060250546E-6 -2.109249487683282E-6 -2.221117390994352E-7
peri 1.420586098012407E-7 4.957448981247255E-8 2.593989253451343E-5 -2.109249487683282E-6 7.85389340437514E-6 4.83773436159722E-7
i 1.329900562911537E-8 6.606263923838027E-9 1.456211885655868E-6 -2.221117390994352E-7 4.83773436159722E-7 4.874970457902998E-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 6 from 144 observations, assumed slope, autocmod 2.6k
comet total magnitude slope K1 10.   n/a 6 autocmod 2.6k
comet nuclear magnitude M2 15.4   0.3 6 from 4 observations, autocmod 2.6k
comet nuclear magnitude slope K2 5.   n/a 6 autocmod 2.6k
comet nuclear phase coefficient PC 0.03   n/a 6 autocmod 2.6k

[ 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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