Itty-bitty galaxies near M83

[RickS]

Some very nice data from Martin Pugh's CDK17. These are the tiny little galaxies on the edge of M83: PGC 48132, the "big" one and PGC 724525, the smaller one. I'm still working on M83 itself. The data deserves more than a quickie process :)

Mike Sidonio also featured these little critters back in 2015:

http://www.pbase.com/strongmanmike2002/image/159529247/original

Cheers,
Rick.

[LewisM]

Wow,, just wow

[barx1963]

Love those 2 little galaxies. And so nice to see some other little tackers there!

[RickS]

Thanks, Lewis.



Thanks, Malcolm. Yes, some really tiny ones as well, though I suppose they might actually be very large :)

[multiweb]

Very nice. You can even see the star forming regions in the big one spiral arm. :thumbsup::thumbsup::thumbsup:

[RickS]

Ta, Marc. I thought the level of detail was pretty cool!

[multiweb]

It is. You've got a shot of the whole galaxy field somewhere?

[RickS]

Still working on it... the data deserves careful processing and probably many revisions before I'm happy with it ;)

[Andy01]

Nice to see the supporting cast of M83 getting a solo gig :D
They must be Jedi galaxies, you know - distant galaxies far, far away....

[Retrograde]

Wow - these galaxies are usually only just glimpsed alongside M83. Amazing to have detail in them like this! :thumbsup:

[Camelopardalis]

Neat Rick :thumbsup:

Interesting to see how they looking in a substantially larger scope...

[Peter Ward]

Shaping up well. The stellar footprints look to be half the size of the image you linked to. Nice. :thumbsup:

[strongmanmike]

Yes very cool little buggers huh Rick?..can't wait for your final masterpiece :thumbsup:...glad to see my lill'oll short focal length 12" f3.8 and without a PMEII, AOL, Protrack etc or even PEC :lol: can do so well compared to Martins amazing kitted up 17" rig :thumbsup:...would happily trade though :D

Mike

[alpal]

I wanted to find out how big the larger of the 2 small galaxies is compared to our own Milky Way.
I did some quick scaling by printing the picture of M83 & the little galaxies on one page.

I measured 110mm wide for M83 & 10mm wide for the largest of the 2 small galaxies.
Those galaxies are about 600 million light years away.
M83 is 15 million light years away,
therefore it appears 600/15 = 40 times apparently smaller.
Given that M83 is half the size of our Milky Way
lets double it's size to 220mm and also multiply 40 x 10 mm = 400mm.
If we divide 400mm/ 220 mm = 2.
Therefore the larger of the 2 tiny galaxies is twice the size of our Milky Way galaxy
& therefore about the same size as Andromeda.
It's a large galaxy indeed.

cheers
Allan

[RickS]

Thanks, Andy :lol:



Ta, Pete.



Need to go at least twice as big next time, Dunk :thumbsup:



Thanks, Peter. The image is drizzled to twice the native image scale.



Thanks, Mike. The 12" acquitted itself well and is definitely more portable!



Thanks, Allan. My back of the envelope calculation puts the major axis of PGC 48132 at 229,000 light-years vs a diameter of 100,000 ly for the Milky Way so essentially the same result.

[astroron]

Nice Rick. :thumbsup:
More detail than the DSS image on Aladin. :)
Cheers:thumbsup:

[RickS]

That's good to know, Ron, though they currently beat me on sky coverage. I hope to catch up one day :lol:

[strongmanmike]

With the number of scopes you have your fingers into around the globe...I recon you might just catch'em Rick :lol:

[RickS]

Fingers crossed, Mike :thumbsup:

[Slawomir]

Very very nice Rick. Great colour balance and outstanding processing, as we can witness in each of your astro images. Mike's version is also outstanding, but since you have provided a link and if I was forced to compare, yours is a notch or two higher...:thumbsup:

:scared3:

[RickS]

Thanks, Suavi. I guess it shows that aperture (and Martin's disciplined acquisition technique) counts when you're chasing tiny fuzzies :)

[Stevec35]

Very nice Rick. Great detail.

Steve

[strongmanmike]

No need to hide Suavi you're quite correct but I am still happy to see I got as close as I did with hardly any data in what were below average seeing conditions....love to have Martins rig, it's a beauty..maybe I should hire it too?..he is not far from me actually :question:..maybe I can hack into his Wi Fi :lol:

Mike

[RickS]

Thanks, Steve.



Have you tried "admin/1234" yet? :lol: I read a recent article about the security of cargo ships and it turns out that a significant number of them still have the default passwords on their network gear. Even worse, many don't have separation between their comms network and the production networks that run the ship.

[topheart]

Very cute. I am looking forward to the M83 !!
Cheers,
Tim

[RickS]

Thanks, Tim. Hope I haven't set expectations too high :)

[gregbradley]

Nice Rick but I only really want to see the big one.

By the way I saw on Rob Gendlers' site an example of M83 from pro observatory data showing a large stream of stars I think its a fair way above M83.

Greg.

[strongmanmike]

That would be this star stream (http://www.pbase.com/strongmanmike2002/image/132837742/original) perhaps...?...I caught it with the 6" Starfire back in 2011 :thumbsup:

Mike

[RickS]

Hi Greg, I'm working on it :) The star stream is faintly visible and I think it's responsible for the dark ring that mny of us see around M83.



Nice one, Mike. I hadn't seen that image of yours before.

[strongmanmike]

Yep, been revealing super faint sheet in my data for many years mate, even without ion milled optics :lol: ...so far just two of them have been brand new though :D

Mike

[RickS]

Yeah, those photons look just a little rough ;)