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Contains:  Bubble nebula, M 52, NGC 7510, NGC 7538, NGC 7635, NGC 7654
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Bubble Nebula (widefield mosaic 2009), 


            Tony Cook
Bubble Nebula (widefield mosaic 2009)
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Bubble Nebula (widefield mosaic 2009)

Technical card

Imaging telescopes or lenses: Televue TV-85

Imaging cameras: canon 450D

Mounts: Losmandy GM-8

Focal reducers: TeleVue TRF-2008 0.8x

Software: Russle Croman GradientXTerminator  ·  Noel Carbonni Astrotools  ·  Mike Unsold Images Plus  ·  Photoshop CS 2

Filters: Astronomik L UV-IR Block Clip-in

Dates:Nov. 15, 2009

Frames: 73x300" ISO800

Integration: 6.1 hours

Darks: ~72

Flats: ~19

Avg. Moon age: 28.24 days

Avg. Moon phase: 1.88%

Basic astrometry details job: 647487

RA center: 23h 18' 59"

DEC center: +61° 18' 0"

Orientation: 179.606 degrees

Field radius: 1.611 degrees

Resolution: 3112x2298

Locations: Dark Sky Site, Kirby Malzeard, North Yorkshire, United Kingdom


One of my earliest photographs taken with a modified Canon 450D using unguided imaging on a Losmandy GM8 mount. This required very careful offset balancing, excellent PA, good PEC and a high DEC target to achieve good results. I obtained 73 very good frames over two nights.

The field contains the open cluster Messier 52 (NGC 7654), the Bubble nebula (NGC 7635), and small but bright knot of a hydrogen emission nebula (NGC 7538) and a small open cluster in the bottom right (NGC 7510)

Version B: re-cropped to remove a mosaicking issue. Reset the black point by sampling three very dark dust clouds to pick better values

Version C: fixed a vignette issue exposed by the colour rebalance in B



Tony Cook
License: Attribution-NonCommercial-NoDerivs Creative Commons


  • Final
    Bubble Nebula (widefield mosaic 2009), 


            Tony Cook

Sky plot

Sky plot


Bubble Nebula (widefield mosaic 2009), 


            Tony Cook

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