https://www.timeanddate.com/eclipse/
https://earthsky.org/tonight/supermoon-lunar-eclipse-january-20-21
Ireland(Dublin) eclipse time morning of Monday January 21 = monday morning from 2:36 am entering penumbra, 3:33am entering umbra, 4:40am to 5:42am fully in umbra, 6:50am exiting umbra, 7:47 eclipse ends with moon out of penumbra.
What will the weather be like?
Hard to tell, but might be ok:
Sunday night cold, frosty! dry, clear, Monday am some clouds.
http://m.met.ie/forecast-national.aspx
https://www.mountain-forecast.com/peaks/Djouce/forecasts/725
There is a cool animated thingabujim on timeanddate.com that shows when the moon enters each phase of eclipse for any part of world:
https://www.timeanddate.com/eclipse/
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| The umbra is about 3 moon diameters in width. But the moon can swing across 5 degrees and can pass up to 10 moon diameters above or below the umbra. So we do not always get a lunar eclipse when the moon is full. |
Lunar eclipses always correspond with full moons when the sun, the earth and the moon are directly lined up. Why? The moon takes about 28 days to do a full circle around the earth. When it is a new moon it is closer to the sun than us so the side we see is in full shadow. As it moves until it is the same distance from the sun as earth over 7 days we start to see a part of the moon illuminated by the sun, over the next 7 days it becomes full. The moon rotates about the earth at a jaunty angle of about 5 degrees or ?20 moon diameters relative to the path the earth takes around the sun. So mostly when the moon is full it doesn't pass through the shadow cast by the Earth. But every so often it does dip into or pass through the shadow and this is can be seen by us.
Why is moon dark blood red not black when in shadow? Because sunlight through earth's atmosphere is refracted(and blue wavelenghts scattered) so the umbra shadow the earth casts has this darker more red-ish light.
Good explanation and diagrams:
https://skytonight.wordpress.com/lunar-eclipse/
https://www.businessinsider.com/lunar-eclipse-vs-solar-eclipse-difference-2018-7?r=UK
GOOD INFO:
https://earthsky.org/tonight/supermoon-lunar-eclipse-january-20-21
Day and night sides of Earth at greatest eclipse (January 21 at 05:12 Universal Time). The shadow line at left represents sunset January 20 and the shadow line at right depicts sunrise January 21, 2019. Image via the U.S. Naval Observatory.
5am UTC == 5am GMT/Irish time
1 comment:
Accidentally woke @3:40 saw a dark bite out of side of very bright moon. Cat really wants to go out!
At 5am in totality almost fully dark red with a sliver of bright on one side. Good view! Our house awkward as a viewing platform, moon is side on.
At 5:30 fully cloudy now in Dublin! Back to sleep. Good photos from Irish Astronomy facebook group.
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