Sh2-73 LRGB

Sharpless 73
-----------------------
According to
a post by Harel Boren on CN: This region was originally regarded
mistakenly as an HII region, and accordingly included in the Sharpless
catalogue of emission nebulae as SH2-73, probably due to the fact the
brightest sections of the nebula show in the Palomar-Schmidt red
plates. However, there's no HII region there… It is also
known in other names, including LBN 105-106.
The nebula is illuminated by the integral radiation field
originating from the galaxy plane. These very faint reflection nebulae
lie at a relatively high galactic latitude (about 45°) and are
categorized as integral flux nebulae to indicate the particular source
of illumination.
Here is a link to Harel's excellent shot: http://www.pbase.com/boren/image/142400400/original
-----------------------
Camera: Apogee U16M w Astrodon Gen II LRGB
filters
Scope: AP155 EDF F/7 w Robofocus
Mount: Paramount ME
16 x 10 min Luminance; 8 x 10 min each RGB
Acquired with
CCDSoft5 using CCD-Commander automation
Dark and Flat Calibration plus Alignment and Sigma Reject combine in
Maxim DL
Levels, Curves and Contrast adjustment
in Photoshop CS5
Flesherton, Ontario
May 12 2012
Home