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Jeff Young
Post Laureate
Reged: 08/04/05
Posts: 4119
Loc: Ireland
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I got my first clear night since 12/14 (I was away over Christmas).
Quote:
NGC1160/61 1/4/2008 23:00 UTC; Pickering 5; NELM 5.5; SQM 20.7
One quite bright galaxy (NGC1161) with an evenly condensed core ENE of two bright field stars, the other (NGC1160) much dimmer, more extended, and with no appreciable condensation. 1160 elongated NE-SW; 1161 more rounded, but still slightly elongated NNE-SSW.
1161's core appeared mottled at 175x, but not at 260x. Optical illusion?
Sadly, I got clouded out immediately afterwards. Mars was still poking through, but at Pickering 5 not much detail was available.
It was also the first light (?) with my heated motorcycle pants. They worked great, but the session was short enough that I wouldn't want to claim them the bee's knees just yet....
-- Jeff.
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Nikon 18x70s / UA Millennium Colorado:
Solarscope SF70 / TV Pronto / AP400QMD Coronado SolarMax40 DS / Bogen 055+3130
APM MC1610 / Tak FC-100 / AP1200GTO Tak Mewlon 250 / AP600EGTO
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olivier
sage
Reged: 01/05/05
Posts: 209
Loc: Belgium - Leuven
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Hi Jeff,
I saw NGC 1161 on Nov 19, 2006 with an 8" Newton. Nelm was 5.5. This is my log:
Located next to 2 relatively bright stars. Almost continuously visible with averted vision. Its 1 to 2' large, oval, with elongation direction E-W. No core visible.
Tried to look for for NGC 1160 but could not see it.
I forgot to mention at what power I observed.
So sorry, it does not answer your question about mottling.
But I have also checked on the Belgian Deepsky log website (most observations are described in Dutch)
and none is speaking about mottling. However, 2 observers are seeing a gradual increase in brightness from the outside to the center of the galaxy. One observer used an 8" scope, the other one a 16".
Hope this helps a bit.
Best regards
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Olivier
http://deepsky-astronomy.blogspot.com/
http://www.deepskylog.be/
Obsession 18" Classic with ServoCat and ArgoNavis
Celestron Advanced C8N-GT (8" Newton)
Canon EOS 300D
Messier: 110/110
Herschel: 400/400
Herschel II: 195/400
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Jeff Young
Post Laureate
Reged: 08/04/05
Posts: 4119
Loc: Ireland
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Olivier --
Yeah, I was all ready to write it off as over-active eyeball and/or brain processing. The galaxy certainly looks like an elliptical in the DSS image, which I think almost never show any visible structure (apart from the gradual brightening to the core).
But...
I looked it up in Simbad, and it's listed as an S0 Seyfert 1 galaxy. S0 is a spiral, right? Oh, wait, S0 is lenticular, which is basically a spiral without structure.
So, unless there's a foreground star (or 2) superimposed on the galaxy core, I'm going to chalk this one up to "jumpy eyeballs".
Cheers,
-- Jeff.
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Nikon 18x70s / UA Millennium Colorado:
Solarscope SF70 / TV Pronto / AP400QMD Coronado SolarMax40 DS / Bogen 055+3130
APM MC1610 / Tak FC-100 / AP1200GTO Tak Mewlon 250 / AP600EGTO
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novbabies
Postmaster
Reged: 06/05/05
Posts: 15678
Loc: Northern Georgia!
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Jeff, great report, really nice sketches too  !
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Good Seeing!
Mark
Orion 12" XTi f/4.9
VERY old Edmund 6" f/8 reflector
Assorted binoculars
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