21P/Giacobini-Zinner 2018-Aug-17 Charles Bell

21P/Giacobini-Zinner
2018-Aug-17 09:27:25 UTC
Exposure 408 secs (Stack 24 x 17 secs)
Sky Motion 3.28"/min P.A. 116.5 deg
Magnitudes
10.7 R aperture radius 10.4 arc sec (UCAC4)
9.8 R aperture radius 21.7 arc sec (UCAC4)
9.4 R aperture radius 31.1 arc sec (UCAC4)
9.1 R aperture radius 42.5 arc sec (UCAC4)
Coma 356" x 193" extended PA 260 deg
Tail 14.5 arc min PA 265 deg extends beyond FOV
Charles Bell H47 Vicksburg
0.3-m Schmidt-Cassegrain + CCD + R filter

Ephemeris data:
t - T = -23.88042 days
Delta = 0.477 AU
r = 1.069 AU
El

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