Observation by Alan Snook: Comet ASASSN1

Uploaded by

Alan Snook

Observer

Alan Snook

Observed

2017 Oct 22 - 21:45

Uploaded

2017 Oct 23 - 20:59

Objects

C/2017 O1 (ASASSN)

Equipment

0.5m f4.1 Dobsonian
17mm & 8mm Ethos eyepieces x120 & x260

Location

Kent

Target name

Comet ASASSN1

Title

Comet ASASSN1

About this image

First seen on Oct 14. I estimate it has brightened to 11^th magnitude. The coma can be traced out to a diameter of about 2 minutes. It remains very weakly condensed, say 2 or 3 on the standard DC scale. Still no sign of a nucleus. The straight tail is about 5 or 6 arc minutes long and has become more obvious. It is now immediately noticeable. The tail’s PA is 270°. The comet’s observed motion is slow, heading N.No structure visible.

Files associated with this observation

O1 ASASSN 2017 Oct 22.jpg (67.4 kB)

Like this image

Jeremy Shears, Graham Winstanley, David Basey, David Swan, Denis Buczynski, Peter Carson

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