Ausschnitt im Sternbild

NGC 7635 Bubble Nebula

Emission nebula in the constellation Cassiopeia.

NGC 7635, also called Bubble Nebula, is an emission nebula and a HII region in the constellation of Cassiopeia, which is about 7100 light years away from Earth.

NGC 7635 Bubble Nebula
Please click on the image for a bigger view.
Object: NGC 7635 Bubble Nebula
Date of exposures: 04.11.2020, 06.11.2020, 07.11.2020
Distance: 7.100 Lightyears
Exposures: Ha: 44 x 300", OIII: 55 x 300", RGB: 76 x 180", Sum: 12,0 hrs.
Telescope: 10'', F4 Newton
Focal length: 1000 mm
Filter: Astrodon H-Alpha 5nm, OIII 3nm, E-Series RGB
Camera: ASI 1600 MMC Pro
Guiding: Off Axis Guider, Lodestar
Mount: EQ8

It is located near the open star cluster Messier 52, named after a bubble formed by the solar wind of a Wolf-Rayet star. NGC 7635 was discovered on November 3, 1787 by the German-British astronomer William Herschel.

In this image with a larger field of 2015 short exposed RGB data were mixed with H-Alpha data as luminance. The image was taken with the Takahashi FSQ-85 and exposed for about 4.5 hours:

Even older shot with DSLR camera from 2014: