The Chile Eclipses Thread

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Britkid
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The Chile Eclipses Thread

Postby Britkid » Fri Dec 30, 2016 7:23 pm

Some parts of the world go 50 years or more without a total or annular eclipse of the sun, but Chile is unusually blessed with four in the current decade (three total, one annular).

I don't suppose any of you caught the first of these, on July 2010? The line of maximum totality was in just about the most remote part of Chile possible, mid way between Villa O'Higgins and Torres del Paine. However it was also visible from El Calafete in Argentina. It would have been visible as a big partial eclipse from anywhere in southern Chile, with the majority of the sun blocked out, and a smaller partial eclipse in northern Chile.

The other two total eclipses are July 2nd, 2019 in Coquimbo and La Serena, and then December 14th, 2020 - between Temuco and Valdivia (both Pucon and Villarica will see the total eclipse and be near the point of maximum duration). I'm hoping to catch both of those although not too confident on the weather prospects. Get them while you can. After that, 2048 is the next total eclipse in Chile.

(Since there are so many people in the US or US ex-pats I'll also mention that there is going to be a total eclipse of the sun in the USA on August 21st, 2017, which will be the best eclipse that there's been in the US for many years and will be a major national event.)

There is a much sooner one on February 26th (2017) in the Coihaique area including the town of Coihaique itself, albeit only an annular eclipse. Normally I wouldn't travel so far just for an annular eclipse - especially in an area of probably uncertain weather - however the Carretera Austral was an area I also wanted to visit anyway at some point, and it fell right into the school holidays, so we are going to go.

Over 99% of the sun will be covered, producing a ring around the moon. However, this annular phase will last a matter of seconds only and only in the Coihaique area.

It will seen as a partial eclipse all over Chile, although quite a small one in the far north.

Anyone know where to get those special glasses for looking at the sun?
In 2014/2015 I blogged abount my life in Chile. http://web.archive.org/web/201601121940 ... age_id=268
I curently have a blog about vegetarianism here whytryveg dot wordpress dot com. However, it's not related to Chile.

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Re: The Chile Eclipses Thread

Postby frozen-north » Fri Dec 30, 2016 8:43 pm

Britkid wrote:
Anyone know where to get those special glasses for looking at the sun?


I had never heard of 'eclipse glasses':

Safe Methods of Viewing

1) Eclipse Glasses

This is the most affordable method. Eclipse glasses are very inexpensive and can be found many places.

There are now two types of eclipse glasses. The older type has filters made of aluminized Mylar. The newer type uses black polymer lenses.


http://perkins.owu.edu/solar_viewing_safety.htm


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Re: The Chile Eclipses Thread

Postby admin » Sat Dec 31, 2016 9:42 am

I caught the one in southern Chile a few years back. Various lunar ones in recent years. We have almost zero light pollution where we are at, due to several hills that block the lights from the towns.

I have, just by accident, managed to catch various eclipses all over the World on pretty regular basis. Seen one that crossed the southwest U.S. when I was teenager.

My all time favorite however was a lunar eclipse, that just happened to occur on museum night in Amsterdam, when my wife and I were grad students. All the museums in the city are free to residents for one night a year, along with the canal boats and the antique trolleys to connect them. Each Museum throws a party to show-off to the residents, what is mostly tourist territory. My wife and I were riding in a boat in the Amsterdam canals on our way to the next Museum, sipping champagne, when we stumbled in to a lunar eclipse. Totally unplanned. Not bad for a free tour. Being students, we were super broke and could not afford museums, canal boats, nor champagne. The only thing that was in our regular budget was the Eclipse, but had we not been in the middle of the canals, I don't think we would have seen it. Too many tall buildings and light pollution in most of Amsterdam center.
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Re: The Chile Eclipses Thread

Postby admin » Sat Dec 31, 2016 1:16 pm

There seems to be a comet that might be visible tonight. I will have a look if I can. There is suppose to be another sometime in January that is easier to see.
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Re: The Chile Eclipses Thread

Postby Britkid » Thu Feb 09, 2017 4:11 pm

Managed to buy eclipse glasses today at
http://telescopioschile.cl/ficha/268/le ... eclipsers- in Santiago centre
Thanks for the reccomendation at46 (on another thread)

With the next eclipse in 2 weeks, and another one in 2019 and 2020, this would be a good time to buy these. Otherwise you are just going to hurt your eyes staring at the sun.

You'll have to look after them carefully to make them last until 2020 though, pretty flimsy things.
In 2014/2015 I blogged abount my life in Chile. http://web.archive.org/web/201601121940 ... age_id=268
I curently have a blog about vegetarianism here whytryveg dot wordpress dot com. However, it's not related to Chile.

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Re: The Chile Eclipses Thread

Postby Britkid » Thu Feb 09, 2017 5:19 pm

It's not particularly exciting, and not an event specific to Chile (unlike solar eclipses lunar eclipses are usually visible over much or all of the earth), but while I'm on the topic of eclipses I ought to mention the lunar eclipse coming up tomorrow Friday 10th.

Of course lunar eclipses occur at full moon when the earth gets in between the sun and moon and casts a shadow, while solar eclipses occur at new moon when the moon gets between earth and sun. I suppose it makes sense that we get both lunar and solar eclipses in the same month, the lunar orbit must be in good alignment all month.

Some lunar eclipses are beautiful, some of you that have seen them will know the moon can go orange/red/pink (seems to vary). While others you can hardly even detect the Earth's shadow or notice any difference. I think this depends on the depth of the shadow but also atmospheric conditions and so can be hard to predict. However this one is more likely to be a non-event one, because it is a penumbral rather than umbral eclipse meaning a partial rather than deep shadow.
total-lunar-eclipse-blood-moon.png
See the photo I'm attaching to understand better. At most you will see it looks darker, but colours are probably less likely. Unlike the above photo, tomorrow the moon will never go into the umbra, only the penumbra.

Therefore, it's perhaps not really worth planning your evening around this, or going somewhere dark to really appreciate it. But perhaps worth a quick glance outside to see if you can tell any difference. The eclipse is from 7.30 - 11.53 with maximum eclipse at 9.43pm - that's in Chile time.. There is no reason to look at precisely 9.43, but it would be better to look closer to that max time, like 9.40 or 9.50.

Around 8-9pm you should (or maybe not) be able to see the left side of the moon being slightly darker, at the max eclipse it should all look the same, and in the latter part (10-11pm) the top right part should be darker than the rest. Here: https://www.timeanddate.com/eclipse/lun ... ebruary-11 So, if someone claims to be able to see that the moon is darker than usual, ask them which part as a test to see if they are really seeing any difference, or just kidding themselves.
In 2014/2015 I blogged abount my life in Chile. http://web.archive.org/web/201601121940 ... age_id=268
I curently have a blog about vegetarianism here whytryveg dot wordpress dot com. However, it's not related to Chile.

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Re: The Chile Eclipses Thread

Postby admin » Fri Feb 10, 2017 5:45 am

Looks like a triple tonight. full moon, eclipse, and a comet that is suppose to be visible with binoculars.
https://www.cnet.com/news/comet-45p-sno ... uary-2017/
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Re: The Chile Eclipses Thread

Postby peregrine77 » Fri Feb 10, 2017 7:45 am

A number 14 welding hood shade is not as official as some astronomical glasses, but works well and can be found at welding supply stores.
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Re: The Chile Eclipses Thread

Postby Britkid » Fri Feb 10, 2017 9:30 am

admin wrote:Looks like a triple tonight. full moon, eclipse, and a comet that is suppose to be visible with binoculars.
https://www.cnet.com/news/comet-45p-sno ... uary-2017/


What a silly article, calling a full moon, eclipse and comet some kind of triple. A lunar eclipse must happen at full moon by definition. There are only two events here, plus some tacky media spin to try and make it sound better than it really is.

After watching the video however it did dawn on me that with the eclipse starting around sunset, it will obviously be very low in the sky as can be seen by an image in the video and the article where Santiago appears in the "visible at moonrise" part. I checked and the moon rises tonight at 8.30pm so obviously you won't be able to see anything before then and even after then you would need a clear view to the horizon with no trees, buildings etc in the way.

Moon will rise between East and North East at about 20:10 in Arica, 20:30 in Santiago, 20:50 in Frutillar, 21:10 in Punta Arenas.
In 2014/2015 I blogged abount my life in Chile. http://web.archive.org/web/201601121940 ... age_id=268
I curently have a blog about vegetarianism here whytryveg dot wordpress dot com. However, it's not related to Chile.

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Re: The Chile Eclipses Thread

Postby admin » Fri Feb 10, 2017 9:36 am

peregrine77 wrote:A number 14 welding hood shade is not as official as some astronomical glasses, but works well and can be found at welding supply stores.


or the shelf near the personal protection section of sodimac and easy, or over by where they sell the welders.
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Re: The Chile Eclipses Thread

Postby Britkid » Fri Feb 10, 2017 1:39 pm

Or to put it another way the moon will rise when the sun sets. Not precisely accurate to the minute, but basically no point going out looking for the moon today until after the sun has already set.
In 2014/2015 I blogged abount my life in Chile. http://web.archive.org/web/201601121940 ... age_id=268
I curently have a blog about vegetarianism here whytryveg dot wordpress dot com. However, it's not related to Chile.

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Re: The Chile Eclipses Thread

Postby bert.douglas » Fri Feb 10, 2017 2:15 pm

peregrine77 wrote:A number 14 welding hood shade is not as official as some astronomical glasses, but works well and can be found at welding supply stores.

Huh? Am I missing something? This is a lunar eclipse, not a solar eclipse.

No eye protection is needed.


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