GRS August 24th

[neil phillips]

Surprised that the little scope is showing so much structure in and around the GRS a couple of streams can be clearly seen connecting. 

Stella Lyra 7.3 CC ZWO ADC. Celestron Omni 2X Barlow screwed straight into the ADC Baader UV IR cut QHY 462 C SW EQ5 pro mount. 90 % of  Capture size

 

Edited August 24, 2022 by neil phillips

[knobby]

That's excellent !

[Kon]

That's a stunning image Neil.

[neil phillips]

Cheers Knobby

Kon Seeing wasn't the greatest looking again. There is still quite a fast stream. Though better than the other day. 

[callisto]

Ooh, I like that Neil 👍

 

Mark.

[chiltonstar]

Very nice detail in the GRS Neil!

Chris

[Stu1smartcookie]

Really nice image Neil 

[Saganite]

Superb image Neil !

[neil phillips]

Thanks guys

[neil phillips]

Another capture 01:56 UT

 

[michael.h.f.wilkinson]

very nice indeed!

[neil phillips]

1 hour ago, michael.h.f.wilkinson said:

very nice indeed!

Hi Michael cheers. Great little scopes these GSOs optics clearly very good

[skyhog]

That is very very nice indeed... 

[Maurizio83]

Hi Neil, very good images! Since we use a very similar equipment, I'm interested in some details:

• which is the frame-rate or exposure time of the recording? and how many frames?
• which is the value of the gain used during the recording. In similar settings I use between 100 and 130 with the QHY462, is also you case?

[dweller25]

That’s a really good image Neil.

It would be interesting to post a single frame to show how it looked visually.

[neil phillips]

6 hours ago, skyhog said:

That is very very nice indeed... 

Thanks Skyhog

[neil phillips]

7 hours ago, Maurizio83 said:

Hi Neil, very good images! Since we use a very similar equipment, I'm interested in some details:

• which is the frame-rate or exposure time of the recording? and how many frames?
• which is the value of the gain used during the recording. In similar settings I use between 100 and 130 with the QHY462, is also you case?

Hi Maurizio the frame rate on the top image was 250 FPS At 1/250s exposure. The middle image was half that, so 125 FPS at 1/125secs exposure or 8ms. Gain was 243 for the bottom image.

And i am stacking a lot, especially at 1/250 secs exposure. As noise dominates. My stack sizes vary. But at 1/125secs think around 12000 at least. At 1/250 secs exposure. I stacking double that so plus 20.000 frames sometimes more sometimes less. 5 Min video de rotation enables even more.

 

5.30 min video de rotation 59.000 frames

Edited August 25, 2022 by neil phillips

[neil phillips]

7 hours ago, dweller25 said:

That’s a really good image Neil.

It would be interesting to post a single frame to show how it looked visually.

I certainly can David. But to be honest it wont tell you much. Especially with a small 7.3 size mirror. With the exposures and gain I am at. the image looks very grainy. Its not the individual frames that tell the story. But more the sum of the parts, in this case. Many thousands of frames. If I show you a single frame. you will think it could not produce the images here. But of course 20.000 frames is a different story. I will extract one if you wish. but it will not tell you anything. Apart from how noisy the individual frames actually are. But I can if you want

 

 

Edited August 25, 2022 by neil phillips

[dweller25]

I am just trying to get feel for how Jupiter looked visually compared to a processed image, or are you saying you can see more than what a single frame shows ?

[neil phillips]

 

34 minutes ago, dweller25 said:

I am just trying to get feel for how Jupiter looked visually compared to a processed image, or are you saying you can see more than what a single frame shows ?

A single frame looks awful David. Though when viewing live on screen, because its running as a live view. your not seeing a single frame. As such its not quite so bad. with moments of clarity coming through a rather grainy and uninspiring view 

 

1/125secs exposure

Edited August 25, 2022 by neil phillips

[dweller25]

Thanks Neil, that tells me two things....

1. Your good at processing the raw data.

2. I'm not doing too bad visually perhaps a bit better than your single image but not quite as good as your stacked image 🤣🤣

[dweller25]

A phenomenal transformation….

 

Edited August 25, 2022 by dweller25

[neil phillips]

4 hours ago, dweller25 said:

A phenomenal transformation….

 

The virtues of noise reduction. Via stacking many thousands of frames

[dweller25]

53 minutes ago, neil phillips said:

The virtues of noise reduction. Via stacking many thousands of frames

y’now it’s not that long ago that even professional observatories would have been happy with images like these Neil 👍

[neil phillips]

10 minutes ago, dweller25 said:

y’now it’s not that long ago that even professional observatories would have been happy with images like these Neil 👍

Agreed. lets go back further, Galileo would have been stunned. Newton looking at the design and materials of the scope would have been studying it with intense concentration. Probably would have got up to speed with modern optics, Very Quickly.

This may well be the best 7" class medium size scope ive owned. That's my current perception. My primary dews over easy though. Something i have to be aware of