Solar eclipses: partial vs totality

I live /just/ outside the path of totality - as in, a few thousand meters. A 40-minute drive north (to Sullivan, Missouri) and I’d be right in the middle of the path. But instead, Mrs. Homie and I are driving about two hours east, to Saint Genevieve, Missouri, to see it. St. Gen is a much prettier town, so we’re going to see the tourist attractions, get some lunch, make a day of it.

I live in fear of it being a cloudy/rainy day that day.

Thanks, folks. The imprecise map answers my questions.

I was wrong. There will be SOME eclipsing in all of North America, Central America, and northern South America.

Soooooo wanting to get Mrs Iggy a visa to visit the States for this one. But if we cannot she will still have a partial eclipse visible from west central Colombia - the country in South America, not the state capital of South Carolina.

The zone of partial visibility will be HUGE.

I’ll be in the upstate of South Carolina where the eclipse will pass approx 2:40pm. I need to scout sight lines since mom’s house is surrounded by trees. I think we have enough of a clearing to get good sight lines.

I should have a welding visor in the shed if it didn’t get tossed out in a fit of spring cleaning. Time is short so maybe better go ahead and order enough suitable vision shields so everyone has their own. Time is short. No sharing.

This is what the eclipse will look like from Bogota.

The point of greatest eclipse duration will be in southern Illinois, near the small town of Lick Creek.

I realize that while the imprecise map gives partial eclipse information for CONUS, it does not fully answer you. This NASA map does, https://eclipse.gsfc.nasa.gov/SEplot/SEplot2001/SE2017Aug21T.GIF, and it also gives partial eclipse info for Russia, Norway & Sweden, Portugal, Senegal, and down to Bolivia.

“Imprecise” was good enough for me, or so I thought before I saw this. You are a gentleman as well as a scholar, and I thank you.

I’m glad it helped.

A little Google-fu showed me a website to a welding supply store not far from me, and I went there today and in the end purchased a 3x4" piece of welding glass at shade 12.

None of the people working there had heard of the eclipse, so I would have been the first person to come there asking about this. I told them that I definitely won’t be the last.

:cool: :wink:

I hate to tell you this, but #12 glass isn’t really good enough for solar viewing. You should get #14.

Citations:
Perkins Observatory

NASA

Sky and Telescope

Remember there’s a new ISO standard, dated from 2015. My cardboard viewers were about $1.50 each. They came in a sturdy cardboard tube and that’s what they’ll be transported in. They’ll stay in there until eclipse day.

I will take them out one bright sunny day, though, to look at the sun. :cool:

#12 was the darkest they had, and I could barely see the very visible sun through it. #11? That was painful.

It was in a mostly-white wrapper, and I was able to push some of the glass into a clear area of the envelope and test different strengths.

That’s hard to understand. I wonder if it was mislabeled or something. I can easily see the sun, and sometimes see sunspots, through #14 glass.

I have used the equivalent of #14 in all the eclipses I’ve photographed, and also this composite of the 2004 Transit of Venus. I wouldn’t use anything less.

That is one hell of a nice photo.

I agree … it’s even in focus …

That is a very nice photo.

I’m trying to find #14 shades that will fit over prescription lenses. Almost all the eclipse glasses I’m seeing don’t say whether they’ll fit over regular glasses, and they all seem to be #5.

I’m in luck on location. One of my cousins lives just south of St. Louis; we’ve never met but have gotten to know each other on FB. Road trip!

Ste. Gen – Sounds like you guys may be close to each other there.

So, in terms of weather, would Illinois be a safer bet than South Carolina? We live in the NYC area and have time for a road trip; we could go to friends in Hilton Head SC or relatives in Zionsville IN, both of whom have asked us more than once to come and visit them. It looks like totality would be a 3+ hours drive from Zionsville and a 1-2 hour drive from Hilton Head.