Observation by Graham Winstanley: Double Cluster

Uploaded by

Graham Winstanley

Observer

Graham Winstanley

Observed

2026 Mar 18 - 20:53

Uploaded

2026 Mar 29 - 18:36

Objects

NGC869
NGC884

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Constellation

Perseus

Field centre

RA: 02^h20^m
Dec: +57°07'
Position angle: -175°47'

Field size

1°40' × 1°07'

Equipment

Altair Astro 115mm ED refractor
Altair Hypercam 26C
Skywatcher EQ6
ASI120MM guide camera
Celestron OAG

Exposure

50 x 60s

Location

Bassingham, Lincolnshire

Target name

Double cluster

Title

Double Cluster

About this image

Processed in Pixinsight.

Pixinsight also has a script to create a Hertzsprung-Russell diagram, so a bit of astrophysics.

A linear image was split to separate the clusters, each were then platesolved, colour calibrated and then analysed by the HRD script.

The script uses the Gaia database information to populate the chart. These may then be refined using filters to remove stars in the field of view that are unlikely to be members of the cluster. The filters use proper motion and distance to remove outliers. The resulting charts can be seen on the accompanying image.

Files associated with this observation

Dbl Clust_nonlin_colsat.jpg (2.3 MB)

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