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JPL Small-Body Database Browser
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C/2017 A1 (PANSTARRS)
Classification: Comet          SPK-ID: 1003491
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457795.5 (2017-Feb-11.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9715101051425382 2.1416e-05  
a 80.39226744089855 0.060506 au
q 2.290367246744148 3.6088e-06 au
i 49.79361493770816 9.7712e-05 deg
node 121.0674365348762 0.00010029 deg
peri 2.044704641442169 0.00019093 deg
M 359.869927542968 0.00014711 deg
tp 2457890.626756078470
(2017-May-17.12675608)
0.00053774 TDB
period 263281.197031732
720.82
297.23
0.8138
d
yr
n .001367359325537444 1.5437e-06 deg/d
Q 158.4941676350529 0.11929 au
  Orbit Determination Parameters
   # obs. used (total)      190  
   data-arc span      324 days  
   first obs. used      2017-01-02  
   last obs. used      2017-11-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .61106  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Jan-29 07:46:32  

Additional Information
 Earth MOID = 1.30661 au 
 Jupiter MOID = 2.95506 au 
 T_jup = 1.267 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.4   0.4 10 2 parameter fit from 91 observations, autocmod 2.6k
comet total magnitude slope K1 23.   n/a 10 autocmod 2.6k
comet nuclear magnitude M2 15.5   0.5 10 from 84 observations, autocmod 2.6k
comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.6k
comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.6k

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2017.4   C/2017 A1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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