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Herschels mistaken planitary

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#1 JimPie

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Posted 18 May 2009 - 02:35 PM

Discovered on May 12, 1787 by William Herschel NGC 6229 was first recorded as a planetary nebula. The globular cluster is located 8 degrees north east of Eta Hercules. Its listed at a distance of 100,000Ly.

Its small bright and compact and its easy to see why Sir William mistook this for a planetary. At low power it has a bright core , and is fairly round in appearance.

At higher magnification it has a slightly more oblong shape running north to south. The core becomes somewhat box shaped. Not much detectable granulation. And I could not resolve any stars at 152x.

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#2 frank5817

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Posted 18 May 2009 - 09:37 PM

Jim,

Very nice sketches, they both look great. :bow: :cool: This is that third globular in Hercules that is fairly easy to locate even in poor skies.

Frank :)

#3 cildarith

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Posted 18 May 2009 - 10:22 PM

Excellent sketch Jim! :waytogo:

Parenthetical note: Herschel actually had quite a few mistaken planetaries, many of them are galaxies.

#4 Dr Morbius

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Posted 18 May 2009 - 11:14 PM

I agree, very nice sketch! :coolnod: :coolnod: :coolnod:

#5 rolandlinda3

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Posted 19 May 2009 - 01:05 AM

Both good sketches and nice to see the comparison/side-by-side presentation. Well done. Roland

#6 JayinUT

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Posted 19 May 2009 - 08:29 AM

Jim,

I agree that I also like the contrasting images side by side. Nicely done and good background information.

#7 CarlosEH

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Posted 20 May 2009 - 11:27 PM

Jim,

An excellent observation of NGC 6229 showing the globular cluster resolved at higher magnification. Thank you for sharing it with us all.

Carlos

#8 JimPie

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Posted 23 May 2009 - 02:38 AM

Thanks everyone.

#9 kraterkid

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Posted 24 May 2009 - 12:15 PM

Jim, wonderful side by side views of this somewhat oblong GC! :bow:






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