21P/Giacobini-Zinner 2018-Jul-16 Charles Bell

21P/Giacobini-Zinner
2018-Jul-16 07:48:18 UTC
Stack 7 x 45 secs
Magnitude 13.5 R aperture radius 7.56 arc sec (UCAC4)
Coma 75" x 38" extended PA 225 deg
Tail 2.1 arc minutes PA 232 deg
Charles Bell H47 Vicksburg
0.3-m Schmidt-Cassegrain + CCD + R filter
ArcSinH stretched in Fits Liberator
Cropped

Ephemeris data:
t - T = -55.94981 days
Delta = 0.717 AU
r = 1.279 AU
El

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