Observation by Graham Roberts: M51 Whirlpool Galaxy HaLRGB

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Graham Roberts


Graham Roberts


2020 Apr 22 - 21:00


2020 Jun 03 - 15:11


The Whirlpool Galaxy (M51)

Planetarium overlay


Canes Venatici

Field centre

RA: 13h29m
Dec: +47°11'
Position angle: -103°57'

Field size

1°05' × 0°53'


M51 Whirlpool Galaxy HaLRGB

About this image

The addition of another 14-hours data during lockdown to last year's initial 2-hour attempt of M51 resulted in by far the longest intergration time I've yet achieved, thereby transforming my image of this exciting object.

For further background and image information please refer to my website here:


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