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Blue Moon Observing



 
 
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  #1  
Old August 1st 15, 04:47 AM posted to sci.astro.amateur
Sketcher
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Default Blue Moon Observing

Once again we have a full moon. We can pretty much forget about visual deepsky observing. But hey, a clear sky is a clear sky . . .

Last night I took out Little Red Riding Scope (an 80mm f/5 achromat) for a quick look at our friendly, neighborhood moon - and to show another individual a "real" blue moon. For this special occasion I used a #38A blue filter that transmits about 17 percent of the incident light. Not only does the filter knock down the blazing brightness of a full moon, but it does so while providing a pleasing blue color to the nearby orb. At 40x the moon looked like a beautiful, blue, crystal marble suspended in the night sky.

I was a little surprised at the sky's transparency. Despite the full moon, Scorpius was easily recognizable (with Saturn 'parked' nearby). All seven stars of the Big Dipper were readily visible. The Little Dipper was recognizable, though only three of its stars were easy to see. If I had so desired, I 'could have' done 'some' deepsky observing - but moonless nights are *so* much better . . .

Sketcher,
To sketch is to see.
  #2  
Old August 1st 15, 06:19 AM posted to sci.astro.amateur
Uncarollo2
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Default Blue Moon Observing

On Friday, July 31, 2015 at 10:47:31 PM UTC-5, Sketcher wrote:
Once again we have a full moon. We can pretty much forget about visual deepsky observing. But hey, a clear sky is a clear sky . . .

Last night I took out Little Red Riding Scope (an 80mm f/5 achromat) for a quick look at our friendly, neighborhood moon - and to show another individual a "real" blue moon. For this special occasion I used a #38A blue filter that transmits about 17 percent of the incident light. Not only does the filter knock down the blazing brightness of a full moon, but it does so while providing a pleasing blue color to the nearby orb. At 40x the moon looked like a beautiful, blue, crystal marble suspended in the night sky.

I was a little surprised at the sky's transparency. Despite the full moon, Scorpius was easily recognizable (with Saturn 'parked' nearby). All seven stars of the Big Dipper were readily visible. The Little Dipper was recognizable, though only three of its stars were easy to see. If I had so desired, I 'could have' done 'some' deepsky observing - but moonless nights are *so* much better . . .

Sketcher,
To sketch is to see.


I'm out observing under the full moon right now. The landscape is very bright around me, but parts of the Milky Way are visible thru my 180mm Mak-Newt.. I'm also imaging the hydrogen clouds in Cygnus with an H-alpha filter. Moonlight interferes only slightly in those images. passing aircraft on their way to Chicago Ohare, on the other hand, are a bigger nuisance.

UncaNebula
 




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