my first DSO: NGC 5139

[-ChoJin-]

Hello, this is my first DSO, taken while on vacations at the Réunion french Island.

Unfortunately I screwed up the ICC profile while exporting to flickr, so the core has a little less details than what I have in PixInsight. I'll be more careful next time.

- Taken with a Takahashi Epsilon 210mm/628mm on an Astrophysics 900 and a Canon 6D (unmodified)
- Total integration time 10min: 10x60s lights RGB @ ISO 800, 10x60s darks, 11 flats, 10 bias
- Processed with PixInsight

 

 

you can see the full frame here (where you have a few faint galaxy, such as NGC 5064, top right, but there are a few others):

 

[laudropb]

Very nice image.

[Yamez]

Amazing Capture! haven't yet tried to image a globular cluster, looks like it's going to be clear tonight so might give it a go and practice.

[wimvb]

Nice images. I like the widefield best.

[MilwaukeeLion]

Beautiful cluster image

[celestron8g8]

Very nice capture ! How long have you have that setup rig (scope and mount) ??

[southernman]

Wonderful capture !  

Peter

[-ChoJin-]

2 hours ago, celestron8g8 said:

Very nice capture ! How long have you have that setup rig (scope and mount) ??

Unfortunately this is not my rig, my grand cousin is directing the Island's astronomical observatory, I therefore had access to all their rigs (including the D=60cm bigass telescope ^^ ) while on vacations. This also had the benefit of having a very good polar alignment already ready for me. From this rig only the camera canon 6D was mine and the (post)processing too  

Unfortunately the weather at night wasn't good during my stay and when it was, the moon was full (that night included). that's why I shot this very bright star cluster instead of a nebula.

My current rig is much more modest: it is a newtonian skywatcher quattro 10" f4 (1000mm) telescope with an NEQ6 goto mount and a orion starshoot guider (with the 50mm orion guide scope) but I have yet to use it for any imaging. I'm hoping to do a first astrophoto with it in the next few weeks if the weather and my schedule let me.

Anyway, thanks a lot for all the kind words

[Stephen Green]

Very nice image

[PatrickGilliland]

Nice work the globular is fizzing with detail.

Paddy

[RSM]

wow, amazing level of detail. Thanks for sharing.

[graemlourens]

Very stunning.

I have seldomly seen such sharp stars!

It seems that slightly undersampling (if i'm calculating your imaging scale correctly) works wonders for globulars and starfields in terms of crispness or am i misjudging the effect?

Kind regards, Graem

[-ChoJin-]

On 8/22/2016 at 08:12, graemlourens said:

Very stunning.

I have seldomly seen such sharp stars!

It seems that slightly undersampling (if i'm calculating your imaging scale correctly) works wonders for globulars and starfields in terms of crispness or am i misjudging the effect?

Kind regards, Graem

The canon 6D has 6.55um pixels, so with the takahashi's focal length of 628mm, the resolution should be 2.15arcsec/pixel

I also did a drizzle 2x2 during processing, which therefore virtually gives me a resolution of 1arcsec/pixel (if I understand the drizzle properly)

but i have no clue what the seeing was that night. When you're saying "undersampling", which target resolution did you have in mind?

[algady]

Excellent!