Observation by Martina McGovern: M51 Whirlpool galaxy

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Martina McGovern


Martina McGovern


2021 Feb 26 - 22:00


2021 Apr 01 - 13:48


The Whirlpool Galaxy (M51)

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Canes Venatici

Field centre

RA: 13h29m
Dec: +47°11'
Position angle: +75°40'

Field size

0°30' × 0°20'

  • Celestron Edge HD 8” on HEQ5 PRO, ZWO ASI294MC Pro, ASIAir Pro, EAF & 60mm guide scope + ASI120MM mini & Optolong L-Pro + L-eXtreme dual band filters

Approx 2hrs of data - mixture of “no filter”, L-Pro & L-eXtreme; Subs of mainly 60sec with some 120sec and a few 180sec which were L-eXtreme + Darks, Flats & Dark flats. Main Cam Gain 150, Camera T -15C for “no filter” & L-Pro and then gain 300, T -15C for L-eXtreme.


Near Cambridge city UK, Bortle approx 4

Target name

M51 Whirlpool galaxy, near Ursa major in constellation – Canes Venatici.


M51 Whirlpool galaxy

About this image

This one is imaged over several days, 26th Feb, 5th, 13th & 16th Mar21

Processing; Deep sky stacker, PixInsight with final tweaks in Photoshop and Topaz DeNoise.

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