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Old 15-05-2022, 02:04 AM
Pilgrim (Igor)
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Join Date: Sep 2020
Location: Brisbane, QLD
Posts: 38
CG4 "God's Hand" Cometary globule taken on Brisbane skies

I had photographed it during 23 nights from December 29, 2021 to May 6, 2022 from the balcony in Brisbane (5km off city center) Bortle 7 sky.

ZWO ASI2600MM camera, on TAL-250K (10" Klevtsov-Cassegrain) with special NPZ 0.7x reducer/flattner MkII (F/6). EQ6-R mount.

Full size and details at https://www.astrobin.com/340xzi/


This is L(R+Ha)GB composition with total exposure time of 44 hours.
23 hours H-alpha
11 hours Light
10 hours R+G+B

Individual sub-exposures used: 3 min for RGB, 2 min for L, 10 and 20 min for H-alpha
(Short 2 and 3 minutes are enforced by heavy light pollution. For H-alpha I switched to 20-minute exposures when I installed an off-axis guider)
Attached Thumbnails
Click for full-size image (CG4_GodsHand_05-2022_TAL250Kred_ASI2600MM_44h_HaLRGB_BNE_size20_200K.jpg)
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Click for full-size image (CG4_GodsHand_05-2022_TAL250Kred_ASI2600MM_44h_HaLRGB_BNE_size20_starless_200k.jpg)
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