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FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 12 Mar 2018 (Monday) 19:56
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Dark sky question

 
craigat
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Mar 12, 2018 19:56 |  #1

I'm headed to Olympic NP next month and am considering doing some astro-stuff, which would be only my second try. The area (right around Ruby Beach, WA) is quite dark according to darksitefiner, so I figure give it a go (if doesn't rain the whole time). I consulted Stellarium and found that there will be a great chance to do the Milky Way, and the galactic core should make an appearance as well. Here's the trick though, the core will rise roughly east (and a little south), which leaves me shooting directly towards Seattle. The city is about 70 miles away from where I'd be standing on the pacific coast. Will the fact that I'm shooting towards the city affect the shot, or does darksitefinder take that into account and say I'm ok regardless of the direction I'm pointing? According to the site, I'm in either the 2nd or 3rd band of darkest. Of course, I can point out over the ocean and get some nice astro shots, and even some MW, but the core will be on the other side when it finally comes up. Please let me know.

Thanks.




  
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MalVeauX
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Post edited 3 months ago by MalVeauX.
     
Mar 12, 2018 23:41 |  #2

Heya,

You'll be fine.

The direction of the city will simply have a gradient of light at the horizon. But above that, in the sky you're under, it will be dark and you'll get deeper (fainter stars will appear) for the same amount of exposure time compared to being in the city and seeing virtually nothing but the sky pollution.

The gradient is normal. It's an unfortunate reality today as there's very few actual "dark" skies out there anymore. So a lot of post processing is about removing the gradients to hide the pollution sites.

Here's an example of light pollution on the horizon due to a walmart parking lot:

IMAGE: https://farm8.staticflickr.com/7368/13031754273_052f0b9929_b.jpg
IMAGE LINK: https://flic.kr/p/kRz9​wv  (external link) DPP_0791 (external link) by Martin Wise (external link), on Flickr

Very best,

My Flickr (external link) :: My Astrobin (external link)

  
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craigat
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Mar 13, 2018 06:11 as a reply to  @ MalVeauX's post |  #3

That's great to know, thanks. The only other time I did this was at Dead Horse State Park in Utah, and we were shooting towards a much closer Moab, but of course, Moab is not as bright as Seattle. It did work out fine then though. Now I just have to find a place to shoot from, Ruby Beach seems to be my best alternative, but there aren't many open spaces that face east in that area (if the core was west, this would be a breeze).




  
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webberj
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Apr 23, 2018 14:51 as a reply to  @ MalVeauX's post |  #4

WOW!




  
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craigat
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Apr 29, 2018 09:52 as a reply to  @ craigat's post |  #5

So as a wrap up to this thread, turns out my concerns were moot, it rained every night :(




  
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MalVeauX
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Apr 29, 2018 10:39 |  #6

Sorry to hear that. Astro can be annoying in that sense.

Very best,


My Flickr (external link) :: My Astrobin (external link)

  
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craigat
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Apr 29, 2018 10:55 as a reply to  @ MalVeauX's post |  #7

it happens, at least I got some good daytime stuff, that was scared the whole time, expensive cameras and torrential downpours don't generally go well together.




  
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Dark sky question
FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
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