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Old 17-10-2021, 09:03 PM
Pilgrim (Igor)
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Pilgrim is offline
 
Join Date: Sep 2020
Location: Brisbane, QLD
Posts: 31
Helix nebula under Brisbane skies

NGC7293, perhaps my main object of this "winter", filmed almost every night during its visibility from the balcony. I also have good news that my new cooled mono camera finally arrived, so it's good time to finish and process all the long series I shot with Canon EOS-Ra to the moment.


Canon EOS-Ra DSLR on TAL-250K (10" Klevtsov-Cassegrain) with 0.7x flattner/reducer (NPZ MkII), mount Skywatcher EQ6R-Pro
Balcony in Brisbane (Toowong, Bortle-7 sky).

1359 x 1 min RGB
1285 min by 5 and 10 min subexposures with H-alpla filter (Antlia 3nm), mostly taken under the Moon
1000 min by 10 min subs with O-III filter (Antlia 3nm)

Total 3644 min (60 hours 44 minutes) of exposures taken during 32 nights in 2021:
31 of July, 04, 05, 06, 07, 11, 15, 16, 19, 21, 27, 28, 29 of August 06, 07, 08, 09, 10, 11, 13, 14, 14, 15, 16, 17, 22, 23, 24, 25, 02, 03, 04 of September.

Big image (click to zoom):

https://www.astrobin.com/full/q3eltn/0/

Starless image:
https://www.astrobin.com/full/q3eltn/D/


Stars was removed by Continuum Substraction method, residual artifacts was retouched in PS. not a single neural network was injured.

Software: APT, DSS, Iris, FITStacker, Photoshop
Attached Thumbnails
Click for full-size image (ngc7293_TAL250K_EOSRa_60h_HORGB_BNE_crop_size100_300Kb.jpg)
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Click for full-size image (ngc7293_TAL250K_EOSRa_60h_HORGB_BNE_size50_starless.jpg)
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