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Contains:  M 27, Dumbbell nebula, NGC 6853, The star 14Vul
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M27 – Dumbbell Nebula (stock DSLR), 


            Paul Garais
M27 – Dumbbell Nebula (stock DSLR)

M27 – Dumbbell Nebula (stock DSLR)

Technical card

Resolution: 5310x3298

Dates:June 29, 2019

Frames: 25x180" ISO1600

Integration: 1.2 hours

Flats: ~100

Bias: ~300

Avg. Moon age: 26.02 days

Avg. Moon phase: 13.31%

Bortle Dark-Sky Scale: 4.00

Temperature: 22.00 job: 2777221

RA center: 19h 59' 37"

DEC center: +22° 44' 20"

Pixel scale: 1.180 arcsec/pixel

Orientation: 358.222 degrees

Field radius: 1.025

Locations: Backyard, Sendenhorst, Germany

Data source: Backyard


Since I am located 51° North, there is currently no true darkness – only astronomical twilight. I was not sure, if it is possible to shoot DSOs with usable quality under those conditions. I planned to use the summertime for optimizations and for example added a aperture mask directly onto the mirror to hide the diffraction effects caused by the clamps, used wooden planks as support for the tripod legs on the lawn to avoid sinking and so forth.

So this one was just a test shot, which is the reason why I only have total integration time of 1.25 hours. This was shot with a unmodified DSLR. So you can only see the brightest parts of H-alpha. With 5-10 hours in true darkness, it should be possible to make the fainter parts of H-alpha visible.



Paul Garais
License: Attribution-NonCommercial-ShareAlike Creative Commons

Sky plot

Sky plot


M27 – Dumbbell Nebula (stock DSLR), 


            Paul Garais

In these public groups

Cloudy Nights