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  #1  
Old 14-07-2009, 10:38 AM
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glenc (Glen)
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Challenge

A challenge for those with a 16" scope. Can you see the magnitude 13.4 galaxy NGC 2573? It is 1 degree from the mag 5.5 star sigma Oct.
The attached wikisky.org image shows the galaxy and the star with yellow circles around them. The yellow square is the south celestial pole SCP.
Polarissima Australis NGC2573 is 1.9' by 0.8' and 93 Mly away.

This “Holy Grail” was discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "Neb Polarissima Australis. Faint, round, gradually a little brighter in the middle, 25 arcsec across. Situated nearly halfway between a star of 10th magnitude south of it, and a small triangle of stars 11th, 13th and 13th mag. north." http://www.fortunecity.com/roswell/borley/49/u472.htm
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Last edited by glenc; 14-07-2009 at 10:54 AM.
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  #2  
Old 14-07-2009, 02:00 PM
CoombellKid
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Hey mate,

We can give this one a try on the weekend, weather permitting. I dont
think I've ever tried for galaxy targets in that area. Looks like it will be
an interesting if not difficult target.

Cheers,CS
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  #3  
Old 14-07-2009, 03:19 PM
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glenc (Glen)
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Rob, you should be able to see it because you have a dark southern horizon.
Hartung never saw it with his 12" despite it being high in the sky for him.
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Old 14-07-2009, 03:48 PM
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astroron (Ron)
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I have observed it on a number of occasions with both with Peter Robbins 30" and my 16" from Cambroon
There is also another galaxy close by NGC 2573A which is visible in a 16" scope
It is a good test of the sky conditions and your observing skills
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Old 14-07-2009, 04:16 PM
CoombellKid
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Np's Glen, have you been able to nab it in your 12" by chance?

Ron, that sounds cool, we'll try for both. Not sure about observing skills
these days. I haven't had the scope out in ages... mostly due to weather,
and when it has been good I've had some other commitments : ( but I
sure am looking forward to this weekend, first get together in a long
time. Is A in the Argo?

Hope this jet stream does a runner by the weekend.

Cheers

Rob
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  #6  
Old 14-07-2009, 04:37 PM
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astroron (Ron)
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Yes Rob, both A and B are in the Argo Navis.
I think You may be pushing it for a 12",but you never know? with a good sky seeing and Transparency and YOUNG eyes it may be possible.
The only thing to do is give it a try.
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Old 14-07-2009, 04:48 PM
CoombellKid
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Thanks Ron : )

You should come down to a Northern Rivers meet one weekend ; )

Bring AstroSouth with you!

Cheers,CS
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Old 14-07-2009, 05:12 PM
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Holding up the sky

Hi Glen & All,

Here is my observation of NGC 2573 in 2005 (46cm):

x185 27' TF

NGC 2573 Galaxy
*RA: 01h 41m 43.0s Dec: -89° 20' 05"
Mag: 14.1 (B) S.B.: --- B-V: +0.59
Size: 2.0'x0.7' Class: SAB(s)cd: P.A.: 98 Inclination: --- R.V.: ---

Always wanted to see this one, but never got round to it till now! A small moderately faint eg -- impossible to determine PA!!. Elong 1.25 x 30" with a faint outer halo and a slightly brighter core area but no nucleus.

-73 A & B I've not tried but will have a go next time I think of it. I'm impressed that Ron has seen them with 40cm -- well done. From looking at the DSS, they look to me like a small, disrupted barred spiral (A) interacting with a barred magellanic-type irregular (B). Small, distant, faint and very LSB -- just the sort of thing I like to look at !


Best,

Les D
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Old 14-07-2009, 05:25 PM
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I'll give it a shot on the next clear night, might see it in the 12" as I've picked off mag 14 galaxies before.
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Old 14-07-2009, 05:34 PM
CoombellKid
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Les,

Good to hear some more input. I think I might give DSS a look while
I'm at it.

cheers,CS
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  #11  
Old 14-07-2009, 06:02 PM
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glenc (Glen)
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Rob try http://www.wikisky.org/?ra=23.826284...mg_source=DSS2
2573A&B are between 2573 and sigma Oct.
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Old 14-07-2009, 06:51 PM
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Thanks Glen,

It'll be a good challenge!!! especially "B" I think

Cheers,CS
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  #13  
Old 14-07-2009, 08:36 PM
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hi glen and rob i tried to see it a couple of years ago with my lx90 i was not that experinced at observing and wasnt use to averted vision id like to try again but ive built my pod with the southern having the state forest tree height at scp not worth looking with those trees
mozzie
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  #14  
Old 15-07-2009, 02:21 AM
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It was not visible in my 12" last night. There is some light pollution from Casino in that direction.
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Old 26-09-2009, 07:07 AM
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scp 2010

This map from Guide 8.0 shows the SCP for 2010. The circle has a radius of 1 degree and mag 6.9 BQ Oct is the star 11' to the right of the pole.
Mag 5.4 Sigma Oct is near the top of the map. To find North I point my 50mm finder to BQ Oct then look along the scope in the opposite direction.
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Old 02-10-2009, 09:58 AM
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bkm2304 (Richard Brown)
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I have tried for this with a 16" Lightbridge and my 22" reflector but form Newcastle there was no luck. Will give it a shot when I set up the 22" in Clarencetown in the coming weeks. It is also a challenge to get the alignment right for the goto of the 22" as well with an object this close to the pole.

Richard
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  #17  
Old 02-10-2009, 05:17 PM
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I saw NGC 2573 with William's SDM 25" at the Qld Astrofest, it was faint.
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