Observation by Martin Butcher: Collinder 399 - The Coathanger

Uploaded by

Stuart Morris

Observer

Martin Butcher

Observed

2012 Aug 11 - 11:49

Uploaded

2021 Mar 25 - 20:24

Objects

Brocchi's Cluster (Collinder 399)

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Constellation

Vulpecula

Field centre

RA: 19^h26^m
Dec: +20°03'
Position angle: -1°31'

Field size

2°34' × 1°42'

Equipment

Meade LX-90 8" telescope fitted to its field tripod by an equatorial wedge.
LX-90 Periodic Error Correction enabled.
Dew Removal straps fitted to telescope and camera lens
Telescope and camera powered by Mains Power.
Stock Canon 40D with 200mm f/2.8 lens stopped down to f/4

Exposure

Twenty one sub-exposures each 30 seconds long taken at ISO400

Location

Isle of Colonsay

Target name

Collinder 399

Title

Collinder 399 - The Coathanger

About this image

Collinder 399 is also known as Brocchi's Cluster, it is a random grouping of stars located in the constellation Vulpecula near the border with Sagitta. The members of the star cluster form an asterism which has given rise to its name as the Coathanger.

Equipment used:- Stock Canon 40D mounted at Prime Focus on Meade LX-90 8” telescope (focal ratio f/10 focal length 2,000mm) fitted to its field tripod by an equatorial wedge. Telescope Polar Aligned. LX-90 Periodic Error Correction enabled. Dew Removal straps fitted to telescope and operating. Telescope driven but unguided. Telescope and camera powered by Mains Power.

Processing details:- Image processed in Photoshop CS3 and Noise Ninja. North is at the top.

Narrative description:- Twenty seven days after New Moon. The weather was calm, clear with occasional light thin high cloud.

Files associated with this observation

MButcherCollinder 399.jpg (369.0 kB)

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