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BAA Images John Hughes

Observation by John Hughes: Messier 101, Pinwheel Galaxy

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John Hughes


John Hughes


2020 Mar 23 - 20:33


2020 Apr 01 - 19:40


The Triangulum Galaxy (M33)
The Coma Pinwheel Galaxy (M99)

Planetarium overlay


Ursa Major

Field centre

RA: 14h02m
Dec: +54°20'
Position angle: +88°46'

Field size

1°11' × 1°40'

  • William Optics Z103
  • ZWO ASI1600mm Pro Cooled
  • SkyWatcher EQ6R-Pro
  • Sesto Senso Auto Focuser
  • Chroma LRGB & Ha 3nm Filters

Gain 139, Offset 21


North Essex, UK

Target name

Messier 101


Messier 101, Pinwheel Galaxy

About this image

My rendition of Messier 101 captured across the four nights of the 23rd, 24th, 25th & 26th March 2020.

This image has been captured using the ZWO ASI1600mm Pro camera using the following filters;

Red 61 x 120s binned 2x2

Green 77 x 120s binned 2x2

Blue 57 x 120s binned 2x2

Lum 33 x 180s & 55 x 300s binned 1x1

Ha 3nm 92 x 300s binned 1x1

Total integration time 20.4 hours.

This image has been captured using the software Sequence Generator Pro and processed entirely in PixInsight.

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