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JPL Small-Body Database Browser
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C/2017 U4 (PANSTARRS)
Classification: Hyperbolic Comet          SPK-ID: 1003546
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458082.5 (2017-Nov-25.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.002910837926696 9.6263e-05  
a -2653.559762138309 87.711 au
q 7.724082396386598 0.00014012 au
i 158.2254689181721 0.00021242 deg
node 245.9531183056163 0.00049603 deg
peri 159.1812982205333 0.0020525 deg
M -.002197428870408922 0.00010888 deg
tp 2458387.257261033662
(2018-Sep-25.75726103)
0.030294 TDB
period n/a
n/a
n/a
n/a
d
yr
n 7.210423347931995E-6 3.575e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      69  
   data-arc span      646 days (1.77 yr)  
   first obs. used      2017-01-02  
   last obs. used      2018-10-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .47849  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 19:59:57  

Additional Information
 Earth MOID = 6.74955 au 
 Jupiter MOID = 2.72541 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 5.0   0.5 8 from 59 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 13.   n/a 8 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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