Author Topic: NGC 6207, M 13, Great Cluster in Hercules, NGC 6205  (Read 456 times)

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Apophis

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NGC 6207, M 13, Great Cluster in Hercules, NGC 6205
« on: May 21, 2019, 20:38:04 »

Reprocessed from July 2018 using Astroart to stack and align instead of DSS
60 x 180s ISO 800 Sigma+Sum
40 x Darks Sigma
10 x Flats Sigma

Imaging telescope or lens:SkyWatcher 120ED Imaging System for Canon DSLR Cameras
Imaging camera:Canon 1000D modified
Mount:Skywatcher EQ6-R PRO Synscan
Guiding cameras:Skywatcher 9x50 Finderscope,  QHYCCD 5L-II MONO
Focal reducer:Skywatcher 0.85x Focal Reducer/Corrector for Evostar-120ED
Software:Astro Photography Tool,  ADOBE PHOTOSHOP CC,  Astroart 7.0 64bit
Accessory:QHYCCD PoleMaster
Resolution: 1209x856
Dates:July 8, 2018
Frames: 60 x 180s
Integration: 3.0 hours
Avg. Moon age: 24.33 days
Avg. Moon phase: 27.59%
Astrometry.net job: 2704355
RA center: 250.576 degrees
DEC center: 36.456 degrees
Pixel scale: 2.987 arcsec/pixel
Orientation: 77.552 degrees
Field radius: 0.614 degrees
Locations: Home, Worthing, West Sussex, United Kingdom
Data source: Backyard
Roger
Altair Astro 66ED-R  ,  Atik 460EX Mono , Skywatcher Evoguide 50ED , EQ6-R Pro.

NoelC

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Re: NGC 6207, M 13, Great Cluster in Hercules, NGC 6205
« Reply #1 on: May 26, 2019, 09:07:27 »
Great focus on the cluster Roger
You even managed to fit galaxy in too.

Well done.
Noel
Synta mount, a bunch of telescopes and a shed (on wheels).

RobertM

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Re: NGC 6207, M 13, Great Cluster in Hercules, NGC 6205
« Reply #2 on: May 26, 2019, 10:15:47 »
There’s something wrong with the rendering of the frame in my browser as all the stars look like crosses.  Apart from that it’s looking good though, to me, there also seems to be a strong green colour cast.

Robert

The Thing

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Re: NGC 6207, M 13, Great Cluster in Hercules, NGC 6205
« Reply #3 on: May 26, 2019, 10:21:50 »
You've had tracking issues:( the stars are not right. There are probably a few subs you need to leave out of the stack.

Colours are nice though.

Duncan
We're all guinea pigs in the laboratory of life. Better a fluffy guinea pig than a lab rat!
¯\_(ツ)_/¯ (Gallic shrug :))

Apophis

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Re: NGC 6207, M 13, Great Cluster in Hercules, NGC 6205
« Reply #4 on: May 26, 2019, 13:39:58 »
Thanks Duncan, Noel and Robert,
 Yes it was a reprocess with all subs so will have another look to see which ones to leave out, and use HLVG a bit stronger.
Roger
Altair Astro 66ED-R  ,  Atik 460EX Mono , Skywatcher Evoguide 50ED , EQ6-R Pro.

Carole

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Re: NGC 6207, M 13, Great Cluster in Hercules, NGC 6205
« Reply #5 on: May 26, 2019, 14:43:45 »
I think the stars appearing like crosses issue is because the image appears to be very low resolution and it is just about 5 pixels per star (inc one in the middle).

Is this the resolution of your camera Roger, or did you bin it or something, or is it just a Jpeg?
I tried doubling the resolution and the problem disappeared.

Also as stated above the cluster is very green.  It might be a problem with colour balance rather than going straight to HLVG.

I am sure you are learning lots and making progress doing all these re-processes.

Carole