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Old 23-10-2019, 10:27 AM
Startrek (Martin)
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M30 Jellyfish Cluster

Captured M30 Jellyfish Cluster last Friday night in Sydney with no moon around
Located in the constellation of Capricornus it is also one of the dimmer globular clusters with brightness at 7.5 magnitude
It was discovered by Charles Messier in 1764
A distinguishing feature of this capture is the bright star off to the north west of the cluster. Does anyone know it’s name ?

40 x 90sec guided subs
20 x darks
Canon 600D with Baader coma corrector
ISO 800
6” f6 Bintel newt on a HEQ5 mount
PHD2 guiding at 1.50 arc sec error
Stacked in DSS
Processed in Startools

Thanks for looking, comments welcome
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Old 23-10-2019, 03:08 PM
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ChrisV (Chris)
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Nice one Martin. Skysafari tells me it's is 41capricorni, a double!

The blurb:
41 Capricorni is a 5th magnitude Double Star appearing in the constellation Capricornus. It is 231 light years from our solar system. It is a yellow-orange giant of spectral type G9III. Its surface temperature is 4730 Kelvins - 18% cooler than the Sun's - and it is 10.4 times the Sun's diameter in size. This star's total energy output, or luminosity, is 49 times the Sun's, and it has a mass of 1.1 Solar masses.

This star is part of a double or multiple star system, but its orbit is not known. Its magitude +11.2 secondary component appears 5.2 arcseconds away, corresponding to a physical distance of at least 368 AU from its primary.
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Old 23-10-2019, 03:27 PM
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Martin ..terrific..you are setting the bar too high...and with this additional information I am going have to add stuff to my images like..this thing is sortta North from here ...

You are doing such a great job and certainly must be causing folk to realise going for a Bintel six inch must be a smart option. They are so well priced and in your hands produce fantastic results.
Well done...very well done..zooming in I was amazed.
Alex
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Old 23-10-2019, 04:10 PM
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+1 with Alex on that. I've always wondered about a zippy little 6" for video astronomy, but maybe an f4 ...
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Old 23-10-2019, 05:09 PM
Startrek (Martin)
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Thanks Chris and Alex
Appreciate the kind comments
The Bintel 6” f5 cost me $290 about 3 years ago and it’s worth it’s weight in gold
I have done a few little mods , new dual speed focuser and heavy duty custom made primary mirror springs , that’s all
So easy to set up and collimate but my HEQ5 is just about at its payload limit with the 6” on board plus all the imaging and guiding gear
It amazes me how folk can drop an 8” on a HEQ5 and do long exposure guided dithered imaging.
Thanks again !!
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Old 23-10-2019, 05:37 PM
Startrek (Martin)
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Sorry Chris forgot to thank you for the detailed information you provided on that star
Well documented
Cheers
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Old 23-10-2019, 08:07 PM
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Nice colours Martin . THX for the share. SSP5 screen shot attached
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Old 23-10-2019, 08:30 PM
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Really nice capture Martin. I did this one about a month ago but with a narrower field of view so I missed the big bright star. Very little difference on M30 between ours

I personally wasn't sure about all of the blue considering it's an old globular cluster but it is nice to see yours having the same colour

EDIT:
One point I'd like to make with posting an image in this thread is that I can say that mine was taken under similar conditions; kinda moonless suburban skies with a OSC, my skies are bright enough that the moon barely makes any difference with the same overall exposure. One big difference being the overall cost of equipment. Your small 6" F/6 shows largely the same image as my heavy 10" F/10. Point being, you don't need big heavy equipment to take a great shot
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Old 23-10-2019, 09:02 PM
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Great colour. I like a cluster with a all of the colour temperature of the surrounding stars giving some context. Interesting that Colin’s 10 inch Aperture result could really be a crop version of your 6 inch aperture result. The result of perception, focusing on faint stars?
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Old 23-10-2019, 09:23 PM
Startrek (Martin)
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Thanks Wes, Colin and Ray
Appreciate the comments
My 6” newt is a great little scope and at f6 gives you a little bit more focal length at 900mm
This scope is actually advertised at Bintel as a visual scope which could be used for lunar images but not recommended for DSO imaging
After more than 2 years imaging DSO’s with this scope I have certainly proved without a question of a doubt that it’s a great scope for DSO imaging ( and using an old DSLR as well )
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Old 23-10-2019, 09:48 PM
casstony
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The blue and gold stars look great Martin.

Mostly cloud or rain where I am for the past month, but I guess I shouldn't complain too loudly.
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Old 24-10-2019, 01:04 AM
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Very nice work again Martin! No doubt the 6 inch can hold it's own I think you've proven that with your images.
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Old 24-10-2019, 04:20 AM
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Ant0nio (Tony)
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Nicely done as usual Martin, the added info on the object is a nice touch too.

Tony
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Old 24-10-2019, 07:09 AM
Startrek (Martin)
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Thanks Tony , LIS and Tony
Appreciate your comments
Yes I think the 6” newt is a great scope either at f5 or f6 , not very common for Astrophotographers, we tend to head for a refractor
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