Observation by Clive Nanson: M13

Uploaded by

Clive Nanson

Observer

Clive Nanson

Observed

2019 May 23 - 22:23

Uploaded

2019 Jul 25 - 13:46

Objects

The Great Globular Cluster in Hercules (M13)

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Constellation

Hercules

Field centre

RA: 16^h41^m
Dec: +35°41'
Position angle: -5°28'

Field size

7°49' × 12°11'

Equipment

Canon EOS 200D
Canon EF 100mm F2.0 USM
Homemade camera drive

Exposure

100 x 30 sec at F2.0, ISO 1600

Location

North West leicestershire

Target name

M13

Title

M13

About this image

A stack of 100 exposures taken on 2 separate nights. The first set of 50 exposures were taken on 21-05 but due to polar misalignment, each image showed drift of about 5 pixels. The second set of 50 exposures were taken on 23-05 and showed no drift. Initially I just stacked the second set of 50 but I found that stacking the full 100 actually improved the individual star images, particularly in the corners (perhaps due to using Sigma-Kappa stacking?).

Files associated with this observation

M13 20190521-23 100mm F2.0 ISO1600 100x30s LR.jpg (1.6 MB)

Like this image

Jeremy Shears, Ray Emery, David Swan, Graham Winstanley, Jimmy Fraser, Andy Wilson, Geof Lewis, Andrew Dumbleton

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