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Did he see really Iskudarian 1?

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#1 SigurRosFan

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Posted 08 February 2008 - 09:45 AM

Hi,

i found this website, which describes an observation of Iskudarian 1. Although it is a very faint object, the observer claims to have seen it under this conditions (9x63 binocular, fst 5,8mag). Is this really possible? And is it possible at all?

#2 Mark9473

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Posted 08 February 2008 - 04:03 PM

The SAC database says that there was no obvious cluster at that location at 60x in a 13" scope. Then again you'd need a very large FOV to make it stand out.

I'm mostly sceptical about the fact that with 9x63 binoculars looking in the galactic plane, you see concentrations of stars everywhere, and equally many areas of unresolved 'background glow'.

On the other hand, what does it mean "to see a cluster". If at least a handful of cluster members are bright enough to be seen, he could rightly claim to have seen the cluster.

Any data on that Isk 1 cluster anywhere?

#3 edcannon

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Posted 08 February 2008 - 11:49 PM

FWIW:

Here's a German page where the translation seems to indicate that the person could not see it with a Kronos 20x60:

http://www.schoenbal...jekte/osnr1.htm

On the other hand, the following page seems to claim (in Spanish) that Iskudarian 1 can be seen with 7x50:

http://www.uv.es/jrtorres/index5b.html

#4 ronharper

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Posted 09 February 2008 - 12:19 AM

How cruel and thoughtless to bring this up when we can't look for it!

Anyhow, I regard that as an open minded and true "observing report".

"it does not seem to have any star concentration at this place. The number of stars is too high to count them, and it would be even difficult to determine which star is, in fact, part of Isk 1 and which star it
is not."

My take is, if he saw it, he did not know he saw it, and doesn't really claim he saw it.
Ron

#5 SigurRosFan

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Posted 09 February 2008 - 04:14 AM

Any data on that Isk 1 cluster anywhere?

They [Iskudarian and Saakian, 1961] suggest it consists of 26 stars with V(?) magnitudes 15.8 to 20.2, spread over an area of 2° by 1°. (Star Clusters, Archinal and Hynes, 2003)

#6 Mark9473

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Posted 09 February 2008 - 01:45 PM

Then it's fair to say that no, he didn't see it. I agree with Ron's reading of the report.






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