Ye old favourite - The Crescent Nebula, NGC6888, Sh2-105 etc.

[RobertM]

Sh2-105 also know as the Crescent Nebula is an emission region located about 5000 ly away in the constellation of Cygnus.

Image capture details:

Subs: 84 * 600s dithered/unguided
Camera: ASI2600MC Pro Colour camera
Filter: Optolong L-Extreme Baader L-Booster
Scope: Skywatcher Esprit 150 with dedicated flattener (f/7)
Mount: 10micron GM2000 UltraPort
SQM: Bortle 6
Calibration: bias, darks and sky flats
Processing: Pixinsight processed as RGB
Location: Garden ROR observatory SE London
Fully automated capture over four nights through August and September 2020 courtesy of Voyager Automation software.

Hope you like it.



2k size: https://live.staticflickr.com/65535/50334415623_e7babb9b40_k.jpg
3k size: https://live.staticflickr.com/65535/50334415623_f988d8577f_3k.jpg

Flickr croaked at the full size and bit depth.

Robert

[julian]

Yes I like it lots

[Roberto]

Excellent result Robert!  You have that OSC camera fully dialed-in.

Roberto

[RobertM]

Ooops - bit of a filter mixup !  The Optolongs don't seems to produce haloes but there were some...  I had thought this may have been due to moisture but after investigation I've found that the filter wheel ID was set incorrectly; it was stuck on the Baader L-Booster.  Unfortunately I have a few others taken with the same filter

Not quite as bad as leaving a focusing mask on but round deep fried dough mixes do spring to mind.

Robert

[MarkS]

Lovely result Robert!

I was wondering how you got such good colour from your skies then I saw the filter being used.

The stars are beautifully sharp right into the corners.  Your Esprit and 10micron mount are doing a good job!

Mark

[RobertM]

Thanks all.

[NoelC]

Wonderful stars and depth of detail Robert
your mount is doing an excellent job.
(not suggesting you didn't!)


Noel