Sh2-101
aka The Tulip Nebula in H-Alpha+RGB
The Tulip Nebula in Cygnus - the above image is an H-Alpha / RGB
combination with additional support using the H-Alpha as a luminance
layer
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 a more conventional presentation of the HaRGB:
And here is the pure RGB:
Lucknow, Ontario
July 2021
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