46P/Wirtanen 2018-Sep-20 Charles Bell

46P/Wirtanen
2018-Sep-20 09:44:23 UTC
Sky motion 0.77"/min P.A. 155.7 deg
Exposure 1113 secs
Stacked with Astrometrica
Magnitude 15.3 R aperture radius 10.4 arc sec UCAC4
rho: 4300 km Afrho R = 17 cm
Coma 27" x 25" extended PA 285 deg
Short tail 0.6 arc min PA 285 deg
Charles Bell H47 Vicksburg
0.3-m Schmidt-Cassegrain + CCD + R filter
ArcSinh stretched with Fits Liberator, annotated, cropped and enlarged 2x in Photoshop
Astrometry submitted to the Minor Planet Center (see MPEC 2018-U70)

Ephemeris data:
t - T = -83.53038 days
Delta = 0.572 AU
r = 1.504 AU
El

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