SH2-170

SH2-170 is an HII region about 7500 light years away and 43 light years across in the constellation of Cassiopeia. It is referred to as The Little Rosette Nebula due to its similarity to the much brighter and more commonly imaged Rosette Nebula in Monoceros. The Little Rosette is rarely imaged due to it being quite dim and nearly invisible without using narrowband filters. This type of nebula is referred to as an emission nebula due to the solar winds and radiation from the central bright star. These ionize the hydrogen, oxygen and Sulphur gasses surrounding it and cause the gas to glow in primarily the red and cyan color spectrum. Dark nebulae and knots are also evident throughout this cosmic gem.

 

Telescope: Astro-Tech AT8RC

Camera: QHYCCD QHY268 Pro M

Mount: iOptron CEM70G

Filters:

· Astrodon Gen2 E-series Tru-Balance Blue 36mm

· Astrodon Gen2 E-series Tru-Balance Green 36mm

· Astrodon Gen2 E-series Tru-Balance Red 36mm

· Astrodon H-alpha 5nm 36 mm

· Astrodon OIII 5nm 36 mm

· Astrodon SII 5nm 36 mm

 

Software: PixInsight:

Processing:

WBPP

Gradient Correction

BXT

SPCC

NXT

SXT

GHS

Curves and Masks

Pixel Math (to re-combine stars)

 

www.astrobin.com/dto5kf/

 

 

 

Done