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Observing >> Deep Sky Observing

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nytecam
Postmaster


Reged: 08/20/05
Posts: 5744
Loc: London UK
M25 OC + Pal 8 GC
      #3313135 - 09/03/09 02:57 PM Attachment (11 downloads)

Here's a wideangle shot from last week via my e-finder of OC M25 that may also be helpful in locating globular Pal 8 ~2 degs east at Mv 10.9. The red exposure highlight mag 6 star V3879 Sgr immediately north of Pal 8 Both clusters in the visual murk from London

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Nytecam 51N 0.1W
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Starlight SXVF_M9+Lodestar CCDs/Canon 300D DSLR/Fuji E550
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star drop
Guilty as Charged
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Reged: 02/02/08
Posts: 16198
Loc: Snow Plop, WNY
Re: M25 OC + Pal 8 GC new [Re: nytecam]
      #3313616 - 09/03/09 07:51 PM

That sure is a faint globular cluster.

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Ted


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sgottlieb
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Reged: 07/22/07
Posts: 339
Loc: SF Bay area
Re: M25 OC + Pal 8 GC new [Re: star drop]
      #3314121 - 09/04/09 01:23 AM

It may not look like much on the image, but it's actually one of the brighter Palomar globulars and easier to view than a few of the NGC globulars! Here are my last couple of observing notes for Pal 8 (at dark sites) --

18" (7/14/07): this moderately bright Palomar was immediately visible at 174x as a 3' disc with a slightly uneven surface brightness, with no visible core. At 280x, the central 2' is clearly slightly brighter and the 3.5' halo is very irregular or scraggly. Perhaps a dozen very faint stars are resolved over the face of the cluster. At 393x, a brighter star at the south edge of the core is a very close double and cluster is quite clumpy, although there was no additional resolution.

18" (7/19/04): at 225x appears moderately bright and large, round, ~3.5' diameter, with little or no central concentration. Still, this is a surprisingly prominent Palomar GC that was missed by the Herschels. Four or five faint stars are scattered around the periphery. At 434x, the surface brightness is very irregular and mottled and the halo is no longer round but more ragged. A nice mag 14 double star is at the south edge and a couple of additional stars (compared to 225x) pop in and out of visibility over the disc.

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Steve Gottlieb
18" f/4.3 Starmaster
Adventures In Deep Space
7500+ NGC/IC Visual Descriptions
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