64P/Swift-Gehrels 2018-Aug-17 Charles Bell

64P/Swift-Gehrels
2018-Aug-17 08:49:04 UTC
Exposure 1500 secs (Stack 12 x 125 secs)
Sky motion 1.00"/min P.A. 025.7 deg
Magnitude
15.9 R aperture radius (4 pixels) 8.5 arc sec SNR 56.59 (UCAC4)
14.4 R aperture radius (17 pixels) 33.0 arc sec SNR 99.41 (UCAC4)
13.9 R aperture radius (30 pixels) 57.5 arc sec SNR 119.56 (UCAC4) max aperture

Coma sunward edges show developing parabolic shape approximately 2 arc minutes
across in the transverse direction and a concentration of dust or dust spline
approximately 2.0 arc minutes length along PA 235 deg
Charles Bell H47 Vicksburg
0.3-m Schmidt-Cassegrain + CCD + R filter

Ephemeris data:
t - T = -78.53334 days
Delta = 0.797 AU
r = 1.673 AU
El

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