Sh2-101
aka The Tulip Nebula in H-Alpha+RGB
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:
And here is the H-Alpha channel alone:
Lucknow, Ontario
July 2021
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