SH2-172 Little Rosette Ha

[ApophisAstros]

 

This small Sharpless object sits high in the northern fall sky north of SH2-171 which is a common object imaged and south of Abell 85, a supernova remnant. The object responds to mostly red filters so a red luminance can be easily used on this one to produce a nice RRGB. It also does very well with a hydrogen-alpha filter and exposing the camera for a very long time begins to pick up a fainter area around it. It also responds very nice with the sulfur II and oxygen III filters so this one makes for a great narrowband color image.. There is also some fine structure in the object that a larger telescope can capture and produce an amazing image of this object, which is not a common image out there these days.

I saw a colleagues image and thought i might give it a try not expecting much given its faintness, and tried with a 450s sub firstly  and did see ghostly image on live view so doubled to 900s and was sufficiently pleased to setup a Ha plan and managed  22 x 900s (Only 16 would stack in Astroart)with the expectation of getting Oiii and LRGB in future but well pleased with this so far.

Acquisition details on Astrobin
Astrobin

Roger

Edited August 28, 2019 by apophisOAS