Sh2-101 aka The Tulip Nebula in H-Alpha+RGB

The Tulip Nebula

The Tulip Nebula in Cygnus - the above image is an H-Alpha / RGB combination

Sharpless 101 (Sh2-101) is a H II region emission nebula located in the constellation Cygnus. It is sometimes also called the Tulip Nebula because it appears to resemble the outline of a tulip when imaged photographically. It was catalogued by astronomer Stewart Sharpless in his 1959 catalog of nebulae. It lies at a distance of about 6,000 light-years from Earth. Sh2-101, at least in the field seen from Earth, is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. [Wikipedia]

Scope: AP155EDF w 4" Field Flattener and Focus Boss II motorized focuser
Camera: Moravian G4 w Astrodon Gen II filters
Mount: Paramount MX guided w an SBIG ST-402ME and Borg 60mm guidescope
22 x 20 min of H-Alpha
15 x 10 min each of RGB
Acquired with CCD-Commander and TheSkyX
Calibration and colour combine in PixInsight
Further processing including the blending of the H-Alpha into the RGB  in PS CC

Click on any image to see it 2x this resolution and to resize it in the browser.

Here is what the Pure RGB without adding H-Alpha looks like:

Tulip in RGB

And here is the H-Alpha channel alone:

Tulip Nebula in H-Alpha

Lucknow, Ontario
July 2021