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Contains:  Extremely wide field
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Dusty Sisters - A Widefield around Pleiades, 


            Gabriel R. Santos...
Dusty Sisters - A Widefield around Pleiades

Dusty Sisters - A Widefield around Pleiades

Technical card

Resolution: 2400x1584

Dates:Dec. 23, 2017

Frames: 11x180" ISO800

Integration: 0.6 hours

Darks: ~15

Flats: ~16

Bias: ~30

Avg. Moon age: 4.67 days

Avg. Moon phase: 22.74%

Mean SQM: 20.80

Mean FWHM: 3.70

Temperature: 16.00 job: 2025735

RA center: 58.012 degrees

DEC center: 24.995 degrees

Pixel scale: 14.451 arcsec/pixel

Orientation: 177.854 degrees

Field radius: 5.772 degrees


I was wondering whether I should share this image here or not. It was captured in very chalenging conditions, with lots of clouds and cirrus that severely decreased SNR. Furthermore, it was more of a test, and very quick - only 33 minutes integration. I was experimenting with my new-at-the-time Samyang 135mm. The result is my best Pleiades thus far (mainly because October-January is the rainy period here in Brazil), but still far from what I'd like to accomplish. Finally, I decided to share, as I like to share both the successes, and the (relative) failures or challenges.

Constructive criticism, comments and suggestions are more than welcome in the comments section. Thank you for taking your time to look at this image.

Taken from Rural Skies (Bortle 3-4; SQM ~20.8*calculated), from MG, Brazil (22ºS latitude).

Date and Time: December 23, 2017
Camera: Canon EOS 80D (unmodded), at ISO 800
Lens: Samyang 135mm f/2.0, operated at f/2.4
Mount: Sky-Watcher HEQ5, tracking, guided
Guiding: Starguider 50mm Guidescope + ASI120mm + PHD2; ~1.7" RMS
Exposure Detail: 11x180s (total 33min)



Gabriel R. Santos...
License: None (All rights reserved)

Sky plot

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Dusty Sisters - A Widefield around Pleiades, 


            Gabriel R. Santos...