NGC7635 – Bubble Nebula

NGC7635, known as the Bubble Nebula, is a bright emission nebula in the constellation Cassiopeia. The bubble was created by the stellar wind from the young, hot and massive central star SAO20575, which has pushed and shaped the glowing gas against the denser material of a surrounding molecular cloud.

General information

Constellation: Cassiopeia
Category: Nebulae
Date: 13 October 2022

Capture

Total time: 5h 00min
Subframes: 360s (Ha: 25x, OIII: 25x) bin1
Gain / Offset: Not specified / Not specified
Calibration: 30 dark frames, 30 flat frames and 30 dark-flat frames, without bias frames

Equipment

Telescope: TS102 f/5.6
Camera: ZWO ASI294MM at -10 °C
Filters: Ha and OIII Astronomik, 6 nm
Mount: Sky-Watcher HEQ5 Pro with belt drive
Guiding: Guide scope 60 mm f/4 + ASI224MC with PHD2
Focuser: Not specified
Filter wheel: Not specified

Processing and environment

Processing: Stacked and post-processed with PixInsight 1.8.9
Acquisition: NINA
Location: l'Ampolla, Tarragona
Sky: Bortle 4

Additional versions

Bubble Nebula detail: NGC7635 – Bubble Nebula — **Bubble Nebula detail**Enlarged crop showing the bubble of ionised gas and its central star in greater detail.

Field of view in HOO: NGC7635 – Bubble Nebula — **Field of view in HOO**HOO view of the photographed field around NGC7635.

Field of view in HOO with NarrowbandNormalization: NGC7635 – Bubble Nebula — **Field of view in HOO with NarrowbandNormalization**HOO view of the photographed field around NGC7635 processed with NarrowbandNormalization.

Identified objects: NGC7635 – Bubble Nebula — **Identified objects**Annotated image identifying NGC7635 and other objects within the photographed field.

HOO crop: NGC7635 – Bubble Nebula — **HOO crop**Crop of NGC7635 processed as an HOO composition.

HOO crop with NarrowbandNormalization: NGC7635 – Bubble Nebula — **HOO crop with NarrowbandNormalization**Crop of NGC7635 processed as an HOO composition with NarrowbandNormalization.