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Observation by Manolo Rodriguez: NGC7635 Bubble Nebula

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Manolo Rodriguez


Manolo Rodriguez


2020 Sep 04 - 00:23


2021 Feb 28 - 11:31



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Field centre

RA: 23h20m
Dec: +61°10'
Position angle: +78°27'

Field size

0°59' × 0°49'

  • Primalucelab Apo 65F-Q, ZWO ASI 294MC-Pro, SW AZEQ6 GT, APM60, ZWO ASI 174MM, Optolong L-Pro filter

64 frames, 300s, 200gain, -10ÂșC, 40 darks, 65 flats.


El Pedroso, Seville, Spain


NGC7635 Bubble Nebula

About this image

Cataloged as NGC 7635, it is also known as the Bubble Nebula, an emission nebula located in Cassiopeia from and located about 11,000 light years away.

This delicate-looking bubble, approximately 10 light-years in diameter, highlights the violent processes that are taking place there.

To the right of the center of the bubble we see a very hot star of the spectral type 06.5. It is SAO 20575, several hundred thousand times more luminous and about 45 times more massive than our Sun. Very young, about 5 million years old. It is expected to go supernova in another 15 million years. It is not in the center of the bubble due to its rapid movement. This bubble structure is one of the three layers of hot gas that surround the star. The powerful stellar wind and intense radiation from that star have blown away the glowing gas structure until it collides with denser matter in a surrounding molecular cloud.

I continue to process data from last summer, I apologize for the delay. I have not had time, nor was I moderately prepared for the processing.

Due to the short focal length of the telescope it has been processed in PixInsight from a x3 drizzle, cropped and resampled, of course.

Programs used: Sharpcap, PHD2 Guiding, PixInsight 1.8 and PS CS6

Nights of the 3rd and 4th of September 2020

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