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Old 06-11-2013, 11:53 PM
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strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,658
The invisible arms of NGC 1512

NGC 1512 is a lovely ring galaxy with a prominent bar and companion galaxy in Horologium. It's quite modest in size with the main visible component around 9' X 5' and shines at Mag 11 with a low surface brightness of just 22.7 mag/squ arc sec

The cool thing is, I saw a Galaxy Evolution Explorer Satellite (GALEX) image taken in UV of NGC 1512 and it showed some otherwise invisible or almost invisible (in visible light) outer arms extending a long way form the galaxy plus a bit of a tangle of shorter faint arms, all looking like a complex history of interactions...and I thought hmm? I wonder what the AG12 could get with a bit of exposure time

Well here is the answer

NGC 1512

Inside the core

Comparison with GALEX satellite image (hopefully I'm not a deluded emperor this time )

Comparison with UK Schmidt

Well..at 10hrs it is almost Mega data Paul and since it was through a 12" at F3.8.. is probably equivalent to about 50+hrs through a 4" @ F8 and marks the longest exposure I have taken so far with the AG12 YAAAY
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Last edited by strongmanmike; 19-11-2013 at 09:31 AM.
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