[AZ-Observing] Re: Good Sentinel this weekend

Matt,

Here's my less overexposed image of NGC 4762 from the dark site known as
Mill and Southern.  It's good for something in that it shows that there's
not even a tiny dust lane near the center.

http://www.psiaz.com/polakis/ccd/gx/n4762.jpg

Tom





At 07:56 PM 4/28/03 -0700, you wrote:
>
>Tom,
>
>Yes indeed, the DSS image has no discernable lane. Perhaps one has
>developed since that image was taken . . .
>
>Then again, maybe not.
>
>It is interesting that human perception sees "detail" when there is
>none. This would seem to particularly true of visual astronomy. Looking
>at barely visible objects and teasing out structure might be contrary to
>the programming of the brain, which often has trouble taking "no" for an
>answer. I know my brain has that problem . . .
>
>I wonder if a short exposure might show a "less-bright" segment of the
>arm in question, and so we might see the darkening as a contrast effect.
>In the DSS image, the core and arms are *way* over-exposed. We need a
>Hubble image . . .
>
>In a casual web search, I have found a more than a few observers who
>drew a lane into that arm. Very interesting . . .
>
>Also, there seems to be a paucity good imagery of 4762 and 4754. Hmm . .
>.
>
>Thanks for the info. 4762 has not seen the last of me.
>
>Matt
>
>
>
>--
>See message header for info on list archives or unsubscribing, and please 
>send personal replies to the author, not the list.
>
>

---

Tom Polakis
Tempe, AZ
Arizona Sky Pages
http://www.psiaz.com/polakis/
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