Observation by Martina McGovern: M51 Whirlpool Gal

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Martina McGovern


Martina McGovern


2021 Feb 18 - 21:00


2021 Feb 20 - 22:06


The Whirlpool Galaxy (M51)

Planetarium overlay


Canes Venatici

Field centre

RA: 13h30m
Dec: +47°12'
Position angle: -131°16'

Field size

1°52' × 1°16'

  • SharpStar 100Q II (Focal length 580mm, Focal Ratio f/5.8) refractor
  • SkyWatcher HEQ5 PRO
  • ZWO ASI294MC Pro, main camera
  • ZWO ASIAir Pro, ZWO EAF (Electronic Automatic Focuser)
  • ZWO 50mm Guide scope, ZWO ASI120MM mini, Guide camera
  • Optolong L-Pro Broadband filter

Total exposure time; Approx 5hrs of data with L-Pro; Subs of mainly 120sec & 180sec with a few 300sec & 600sec + Darks, Flats & Dark flats. Main Cam Gain 100, Camera T -10C


Near Cambridge city UK, Bortle approx 4

Target name

M51 Whirlpool Gal


M51 Whirlpool Gal

About this image

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

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