Observation by Alan Thomas: NGC7788 & NGC7790 Open Clusters in C...

Uploaded by

Alan Thomas

Observer

Alan Thomas

Observed

2022 Dec 16 - 21:20

Uploaded

2022 Dec 24 - 12:38

Objects

NGC7788
NGC7790

Equipment

Unistellar eQuinox 112mm reflector

Exposure

4mins.

Location

Norbreck Observatory, Warrington, Cheshire, UK.

Target name

NGC7788 & NGC7790 Open Clusters in Cassiopeia

Title

NGC7788 & NGC7790 Open Clusters in Cassiopeia

About this image

NGC7790 (top left) and NGC7788 (below centre) make an attractive double cluster to light Christmas Eve.

NGC7788 is a class I2p (highly concentrated) open cluster. It was discovered by John Herschel in October 1829, just over forty years after his father, William, discovered NGC7790 (class III2p - no concentration). Both are around mag. 9 and are only c.15' apart, so why WH missed NGC7788 is unclear.

Bortle 7/8, cold (-5˚C).

Files associated with this observation

eVscope-20221216-212042 (2).jpg (1.9 MB)

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Simon Paul Davis

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