Theta Muscae Supernova Remnant (SNR) G304.4-3.1

[CoolhandJo]

Theta Muscae Supernova Remnant (SNR) G304.4-3.1

This recently discovered part of the sky caught my attention on Astrobin. This is my take on this wonderful nebula and region. It represents a few firsts for me. First time Mosaic (2 panel), and first time using CAA rotator from ZWO. Apart from clouds and rain and at the end some guiding issues, I managed to get 9 + hours for each panel. To achieve this FOV I used my Askar V with a 60mm aperture and reducer at 270mm F4.5


Total integration: 9h 20m

Integration per filter:
- Hα: 3h 10m
- OIII: 6h 10m

Equipment:
- Telescope: Askar V 60mm / 80mm Triplet Modular Refractor
- Camera: ZWO ASI533MM Pro
- Mount: ZWO AM3
- Filters: Antlia 3nm Narrowband H-alpha 1.25", Antlia 3nm Narrowband Oxygen III 1.25"
- Software: Adobe Photoshop, Pleiades Astrophoto PixInsight

AStrobin High res:
https://app.astrobin.com/i/5dj0gt

[strongmanmike]

I've seen a few brighter more vivid versions of this elusive sucker, undoubtedly due to longer exposures (?) but I quite like the more subdued look here, moody, ethereal, cosmic :) :thumbsup:

Mike

[CoolhandJo]

Yes this as as bright as I could get. I used 10 and 5 min subs. But 60mm aperature doesn't let much lighter in. Ideally you would use 120mm with larger imaging chip to fit it in.



Thanks Mike . Moody it is!

[alpal]

Hi Paul,
no - it's just the way you have stretched the image.
I checked it out in PS.
The brightest parts of the nebula are only reading about 50 out of a possible 255 bits.
So you are using only about 1/5th of the dynamic range available in your processing.
It's easy to go Ctrl M and stretch it more to make it brighter.

Good picture anyway.

cheers
Allan

[CoolhandJo]

Thanks Allan. I have a few versions on my desktop. The stretched one seemed a bit washed out and noisy so I opted for this. Ideally I should of tripled my exposure time and then stretched it higher. But clouds and guiding issues beat me.

[graham.hobart]

I'm not familiar with this object but I love this.
:thumbsup:

[CoolhandJo]

thanks Graham. Ideally ill shoot this again with double the aperture. Its very faint and only recently discovered.

[Nikolas]

Hey Paul imagine what this would look like with more integration, where is this region in relation to other objects in the sky?

[CoolhandJo]

Its in Muscae

13 9 9 s -65 48 53

[Nikolas]

Cheers mate