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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 ]

[ show orbit diagram ]
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 
[ 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 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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