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Old 28-08-2021, 05:53 PM
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Sunfish (Ray)
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HEQ5 and 200Newt

Here is my PS repro of the 175x3 nb M17. Guiding error worse than 2.

A bit black and blue from APP/ PS auto but interesting colour otherwise.
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Old 29-08-2021, 12:08 PM
RyanJones
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Hi Ray,

I’d be interested to see the full res version. I’m a fan of the colours you’ve used well done.

Cheers

Ryan
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Old 29-08-2021, 03:33 PM
Startrek (Martin)
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Ray
Nice looking M17
Stars are nice and round right to edge of field too for 3 min subs
When you mentioned your guiding was worse than 2 , is that 2 arc seconds rms total error ? What was your Ra and Dec running at ?
Well done !!
Martin
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Old 30-08-2021, 05:39 PM
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Sunfish (Ray)
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Thanks Ryan. Here is a larger 10MB version

https://drive.google.com/file/d/1HRK...ew?usp=sharing

and the HOO version

https://drive.google.com/file/d/1NIp...ew?usp=sharing

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Hi Ray,

I’d be interested to see the full res version. I’m a fan of the colours you’ve used well done.

Cheers

Ryan
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Old 30-08-2021, 06:03 PM
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Sunfish (Ray)
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Thanks Martin.
The guiding is 2.5” RA and 1.5 DEC early in the night and so 2.8 total. In a bad patch it can be 3 or 4.

Later in the night in the West things settle down to 1.5 and 1.5 or 1.3 and 1.7

I think the alignment in Dec is a bit off.




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Originally Posted by Startrek View Post
Ray
Nice looking M17
Stars are nice and round right to edge of field too for 3 min subs
When you mentioned your guiding was worse than 2 , is that 2 arc seconds rms total error ? What was your Ra and Dec running at ?
Well done !!
Martin
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Old 30-08-2021, 06:44 PM
Startrek (Martin)
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Thanks Martin.
The guiding is 2.5” RA and 1.5 DEC early in the night and so 2.8 total. In a bad patch it can be 3 or 4.

Later in the night in the West things settle down to 1.5 and 1.5 or 1.3 and 1.7

I think the alignment in Dec is a bit off.
Ray
Thanks
Gee I’m amazed your getting perfectly round stars with those numbers especially when Ra is nearly double Dec
I cringe when I’m above 1 arc sec on my EQ6-R pro
I’m assuming that your getting some PE in Ra or random spikes in Ra which would undoubtedly cause some star bloat ??
In my capture software APT, when each sub is displayed on the main screen, there’s also a series of thumbnails on the right hand side which is zoomed way in to the centre of the frame and you can see whether an Ra spike in PHD2 has caused star bloat or an irregular shaped star etc... in other words your accessing during the imaging session how your guiding is running ( without looking at the PHD2 graph , guiding numbers and star profile tool ) just by looking at these zoomed in thumbnails
Do you balance East heavy or pretty much even balance ?
Cheers
Martin
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