Jump to content

Narrowband

Owl Cluster


gnomus

Recommended Posts

Having finally got the green for my M13 last night - https://stargazerslounge.com/topic/276558-esprit-120-first-light-m13/ - I had a little time for another object.  I decided to grab 30 mins (6x5 min subs) of R, G & B on the Owl Cluster.  The capture was hampered somewhat by high thin cloud.  This is also on the Esprit 120 with the QSI 690 & Astrodons.

 06A_Owl_1200.png

Link to comment
Share on other sites

I tweaked it a bit to emphasise the cluster a bit more.  It looked to me as if the cluster itself was being swamped a bit by the surrounding stars.  So, I ran Noel's 'Make Stars Smaller' action a couple of times, but masked off the cluster stars from the effect of the Action.  I don't know if this is cheating.

07_Final.png

Link to comment
Share on other sites

I know exactly what you mean, Richard.  I first saw this object in March through my new Dob.  I thought it was one of the prettiest objects I had seen, and I instantly wanted to take a picture of it.  So I needed to buy a new refractor, a new camera, a new ..........

Link to comment
Share on other sites

After some modest success with my all-PI, Pickering's Triangle - https://stargazerslounge.com/topic/276701-pickerings-triangle-bicolour-pi-only-experiment/ - I thought I might rework the Owl using solely PixInsight.  I did drop into PS at the end to run a couple of Noel's Actions (Increase Star Colour and Make Stars Smaller), and I resized for posting in PS whilst there.  Everything else was PI.  I didn't 'cheat' with the differential star shrinking this time either:

04_PI_SCNRx1800.png

Link to comment
Share on other sites

Both first and second light have gone well. I like the first Owl best. In the second we see a blue colour outlying the bright stars, most notably in the second but also visible in the third. I don't know the cluster from experience so, in writing this, I thought I ought to check if the blue is real or not! Now that I've checked a few other images I see others do get it to some extent but I still can't be sure whether it's an artefact or not. Watching the RGB carefully during a plain unmasked log stretch ought to tell you, though. Anyway, the 120 works!

Olly

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.