Re: [APML] How far are light domes visible....

[Chuck Vaughn <aa6g@aa6g.org>]

Chris,

We can see Los Angeles from Chews Ridge with the naked eye. That's 250
miles. It appears as a broad flat glow. There are other towns in that
direction which probably contribute such as Paso Robles, San Luis Obispo,
and Santa Maria but they are too small to make such a broad and uniform
glow.

Chuck <aa6g@aa6g.org>

-----------------------------------

> Well after a few people asked me if I could see the light dome of Blythe,
> CA, from the Desert Center site, I sat down with a regional map and came up
> with the answer.  If you look at the image:
> http://www.abmedia.com/astro/current/dcstartrails-east.html   I'm 99% sure
> the orangish light dome is Phoenix, 180 miles away to the east.  Blythe is
> the smaller greenish/white dome to the right of the Phoenix dome.  These
> domes were not visible to the eye but are there, as the film saw them during
> a long exposure.
> 
> I also figured out what was causing the small light dome to the north in the
> polar star trail shots, I finally realized its Las Vegas.  See:
> http://www.abmedia.com/astro/current/dcstartrails-north.html
> Again, looking at a map, there is absolutely nothing between the site and
> Vegas which is 165 miles directly north.  Normally one would not see the
> dome if there were trees or higher mountains but with a horizon that has
> zero obstructions, it shows up.
> 
> When all you have is empty, unpopulated relativly flat desert between you
> and a large city, it can be seen for a long way.
> 
> Chris
> 
> 
> ==================
> Chris Cook
> Astronomical Photography
> www.abmedia.com/astro
> 
> 
> 
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