Observation by David Swan: Comet Echeclus

Uploaded by

David Swan

Observer

David Swan

Observed

2017 Dec 16 - 18:50

Uploaded

2017 Dec 16 - 20:15

Objects

174P Echeclus (60558)

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Constellation

Aries

Field centre

RA: 02^h37^m
Dec: +11°22'
Position angle: +151°29'

Field size

0°27' × 0°13'

Equipment

Scope: 200mm SCT @ f/6.3
Camera: ASI178MM
Filter: Baader UV+IR cut
Software: FireCapture, DeepSkyStacker and Astrometrica

Exposure

110 x 5s

Location

Tynemouth, UK

Target name

174P/Echeclus

Title

Comet Echeclus

About this image

My brightness estimate - in this large aperture - was mag 14 at 18:50 on 16 Dec 2017.

Files associated with this observation

echforweb_0.png (743.5 kB)

Like this image

Jeremy Shears, Nick James, Dawson, Peter Mulligan, Peter Carson, Colin Henshaw

Comments

Nick James, 2017 Dec 17 - 09:09 UTC

Your mag estimate is pretty good. I've been getting a pretty constant 13.6 over the last few days using an unfiltered CCD and UCAC-4 R mags as a reference, but this light is spread over a growing area as the coma expands.

David Swan, 2017 Dec 17 - 09:51 UTC

Thanks Nick. I changed the catalogue that the programme uses to UCAC4, and requested use of R band mags. The delta mag for the photo ref stars dropped to 0.06! The estimate for the Ech coma was then 13.8. David

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