Discussion Topic |
|
This thread has been locked |
Dos XX
Trad climber
Los Angeles, CA
|
|
|
Topic Author's Original Post - May 1, 2012 - 10:01am PT
|
Mark your calendars! On May 20, 2012, an annular solar eclipse will be visible just before sunset over much of the Western US. Check the graphic below to see if the eclipse will be visible from your location:
Click here for a timetable of the eclipse, for many cities in the Western US:
http://media.skyandtelescope.com/documents/May2012_Annular_table_24hr.pdf
|
|
climbski2
Mountain climber
Anchorage AK, Reno NV
|
|
Catch it if you can and cross fingers for good weather!
Next chance in North America won't be for 20 years.
|
|
Reilly
Mountain climber
The Other Monrovia- CA
|
|
What do the shaded elliptical areas signify?
|
|
Dos XX
Trad climber
Los Angeles, CA
|
|
|
Topic Author's Reply - May 1, 2012 - 12:06pm PT
|
@reilly : the shaded ovals give “snapshot” representations of the Moon’s shadow at approximately 5-minute intervals
|
|
Reilly
Mountain climber
The Other Monrovia- CA
|
|
Does that mean the areas between the darkly shaded areas won't be a full annular?
|
|
corniss chopper
climber
breaking the speed of gravity
|
|
It is never safe to look at a partial or annular eclipse, or the partial phases of a total solar eclipse,
without the proper equipment and techniques.
Even when 99% of the Sun's surface (the photosphere) is
obscured during the partial phases of a solar eclipse, the remaining
crescent Sun is still intense enough to cause a retinal burn,
even though illumination levels are comparable to twilight
[Chou, 1981, 1996; Marsh,1982].
Failure to use proper observing methods will result in
permanent eye damage or severe visual loss
. This can have important adverse effects on career choices and earning potential, since it has been shown that most
individuals who sustain eclipse-related eye injuries are children and young adults [Penner and McNair, 1966; Chou and Krailo, 1981].
http://eclipse.gsfc.nasa.gov/SEhelp/safety2.html
|
|
Dos XX
Trad climber
Los Angeles, CA
|
|
|
Topic Author's Reply - May 1, 2012 - 01:51pm PT
|
@reilly : all areas between the parallel red lines in the graphic will see a full annular eclipse for some period of time.
|
|
Dos XX
Trad climber
Los Angeles, CA
|
|
|
Topic Author's Reply - May 11, 2012 - 10:25am PT
|
Get ready! It's a little over a week away! Click on the link above for a very useful time table.
|
|
spyork
Trad climber
Tunneling out of prison
|
|
|
May 18, 2012 - 02:40am PT
|
I am taking my boys up to Redding. Already got our Eclipse glasses!
|
|
Ed Hartouni
Trad climber
Livermore, CA
|
|
|
May 18, 2012 - 03:10am PT
|
I'm headed to Redding, too... the Sundial Bridge, to shoot the eclipse
|
|
Spider Savage
Mountain climber
The shaggy fringe of Los Angeles
|
|
|
May 18, 2012 - 10:36am PT
|
I've use 2-3 layers of exposed film to view them. But very short periods of time.
Telescope stores have filter, not cheap.
You can punch a round circle in a piece of paper, line it up perpendicular to the sun, and project an image of the eclipse on a flat surface.
Watch this link to see the shadow cross the Earth. Might even be better than going outside.
http://www.goes.noaa.gov/browsw2.html
|
|
Dos XX
Trad climber
Los Angeles, CA
|
|
|
Topic Author's Reply - May 18, 2012 - 10:52am PT
|
I had plans to link a business trip next week to Oroville with Eclipse watching on Sunday, but alas, my plans didn't work out :-(
I'm depending on you, Ed, to get some killer shots. Sunday's weather forecast for Redding looks pretty good right now.
|
|
WBraun
climber
|
|
|
May 18, 2012 - 10:58am PT
|
Moon eclipse = inauspicious sign
|
|
Jaybro
Social climber
Wolf City, Wyoming
|
|
|
May 18, 2012 - 11:00am PT
|
But it's not really the moon, right? :)
|
|
Footloose
Trad climber
Lake Tahoe
|
|
|
May 18, 2012 - 12:50pm PT
|
Please correct me if I'm wrong,
so from the image above, see Carson City and Reno and South Lake Tahoe there, the only difference in sighting based on latitude between these three is that reno will provide a more perfect annulus, is that right? because it's closer to the center line (marked in yellow).
So Klamath, it looks like, will provide a near perfect annulus.
|
|
Ed Hartouni
Trad climber
Livermore, CA
|
|
|
May 18, 2012 - 05:32pm PT
|
I have an ND400 filter (9 stops) purchased for this event,
at f22 and a 100mm lens, the sun image in the viewfinder of my dSLR is slightly painful...
I'll probably go with f32 with 110mm lens, that's also shooting at 1/2000s
the projection of a pinhole is the safest method for observing the eclipse...
I suspect buying "eclipse glasses" would probably be satisfactory, too, but I'm sure the quality and functionality vary greatly.
|
|
nita
Social climber
chica de chico, I don't claim to be a daisy.
|
|
|
May 18, 2012 - 06:24pm PT
|
Hey Ed, If you need a place to crash Sunday night after the eclipse, you are very welcome to stop on by... We are a hour south of Redding...
Can't wait to see your pictures...
|
|
|
SuperTopo on the Web
|
Let us know!