NGC 7635

 Posted: Jan 12th, 2026
Technical Info
Telescope/Lens: Sky-Watcher 150/750
Camera: Canon 450D mod
Mount: HEQ5 Pro
Guide Scope: Angeleyes 50mm
Guide Camera: Datyson t7c
Software: Pixinsight, siril
Accessories: MEYON 2” MPC 1x
Exposure:
13 x 300" ISO/Gain: 800 - LAIDA двухдиапазонный 7 нм
30 x 400" ISO/Gain: 800 - LAIDA двухдиапазонный 7 нм
Blue, Bortle 3 zone:
 Gproletarsk Rostovskaya Oblast, Russia
 Aug 13th, 2025
4 h 25 m
93
Resolution: 3590x2243 px
Scale: 3094 KB
NGC 7635 is an emission nebula in the constellation Cassiopeia. It is nicknamed the "Bubble Nebula" due to its shape. It is located near the open star cluster Messier 52.

The bubble was formed by the powerful stellar wind from a hot, massive star that is rapidly losing mass in the final stages of its life. When this supersonic stellar wind collides with the interstellar material of a nearby giant molecular cloud, it creates a shock front that shapes the bubble.

Overall, testing the filter proved problematic. At the very least, there were issues with focusing on the object itself, which necessitated an additional trip for more imaging.

Raw data available

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Comments

Great shot. But it seems like it might be slightly out of focus.
13 Jan, 2026 Reply
Epsio Replied to Vladimir
Thank you. There was some haze during the shooting, which may have affected the final result. Although I set the focus using software with a mask on bright stars.
13 Jan, 2026 Reply

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