Various Collections for Comparison:

I am going over the Sharpless2 Objects again with my new C11 and a few more years experience. 

The current image with the C11 focuses on the details of the small nebula in the starless.  The RGB is the secondary image. I have a discussion of why greyscale is perceived to show more detail than RGB here in relation to another greyscale image. 

This version is about 3h of Ha and RGB and processed with StarX and BlurX and GHS.  The wide histogram spread is thanks to GHS. 

Have photographed this before as part of the series.  Below was 9h taken with my Stellarvue 130 with a CCD.  


Sh2 106 HA RGB (AKA The Snow Angel Nebula)

Basic Information From GalaxyMap:

Despite its appearance, this is not a planetary nebula, but a bipolar nebula embedded in a giant molecular cloud and star formation region ionised by an O8 star, [url=http://galaxymap.org/cat/view/sharpless/SH 2-106 IR]Sh 2-106 IR[/url]. Avedisova catalogs this region as SFR 76.38-0.61, with 49 distinct components, including 4 masers.

Sh 2-106 may be part of the Cygnus X complex at 1700 parsecs and hence more massive than usually believed.[[url=http://galaxymap.org/cat/view/sharpless/106#note_1]1]

This is a giant molecular cloud ionised by an O8 star, S106IR.[[url=http://galaxymap.org/cat/view/sharpless/106#note_2]2]

Notes: 

1. ^ Schneider, N., Simon, R., Bontemps, S., et al. (2007). "A multiwavelength study of the S106 region. III. The S106 molecular cloud as part of the Cygnus X cloud complex", Astronomy and Astrophysics, Vol. 474, 873-882. [[url=http://adsabs.harvard.edu/abs/2007A%26A...474..873S]2007A&A...474..873S]  

2. ^ van den Ancker, M. E., Tielens, A. G. G. M., & Wesselius, P. R. (2000). "ISO Spectroscopy of the young bipolar nebulae S106 IR and Cep A East", Astronomy and Astrophysics, Vol. 358, 1035-1048. [[url=http://adsabs.harvard.edu/abs/2000A%26A...358.1035V]2000A&A...358.1035V]

Distance Estimates:

600 pc [[url=http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004A&A...424..965G]2004A&A...424..965G]

1700 pc [[url=http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2007A&A...474..873S]2007A&A...474..873S]

GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>

There are 313 Sh2 objects.  All now imaged by yours truly.  These are basically the Hydrogen Alpha and other ionized nebulae around the edge of the Milky Way.

This is my collection:

Sharpless2

Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171

Please note there is also a Sharpless2 Group with now more than 3000 examples.

Sharpless2 Group

Other useful links include:

Gary Imm's Collection

GalaxyMap's Collection

The Sharpless Catalog

The MDW H-alpha Sky Survey

The Avedisova star formation regions and the Sharpless nebulae TABLE

Hope you enjoy these obscure but interesting objects...