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

[CoolhandJo (Paul)]

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 (Michael)]

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

Mike

[CoolhandJo (Paul)]

Originally Posted by 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

Mike

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]

Originally Posted by CoolhandJo

Yes this as as bright as I could get.

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 (Paul)]

Originally Posted by 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

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 (Graham stevens)]

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

[CoolhandJo (Paul)]

Originally Posted by graham.hobart

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

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

[Nikolas (Nik)]

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

[CoolhandJo (Paul)]

Originally Posted by Nikolas

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

Its in Muscae

13 9 9 s -65 48 53

[Nikolas (Nik)]

Originally Posted by CoolhandJo

Its in Muscae

13 9 9 s -65 48 53

Cheers mate