A deep partial lunar eclipse will darken the moon for much of the globe on November 19, 2021 (overnight on November 18 for North America). Most locations will see up to 97% of the moon slip into Earth’s shadow. North America has the best location to see the entirety of the eclipse. Find maps and timing for the eclipse below. In some cases, the times are in UTC and you must convert.
This is an exceptionally deep partial eclipse with an umbral eclipse magnitude of 0.9742. In other words, 97% of the moon will be covered by Earth’s dark umbral shadow. With a just thin sliver of the moon exposed to direct sun at maximum eclipse, the rest of the moon should take on the characteristically ruddy colors of a total lunar eclipse.
Viewers in North America and the Pacific Ocean, Alaska, eastern Australia, New Zealand and Japan will be able to see the entire partial lunar eclipse. Observers in western Asia, Australia, and New Zealand miss the early stages of the eclipse because they occur before moonrise. Similarly, South America and Western Europe experience moonset before the eclipse ends. None of the eclipse is visible from Africa, the Middle East, or western Asia.
At the instant of greatest eclipse (09:02:56 UTC) the moon lies at the zenith for a point in the Pacific Ocean east of the Hawaiian Islands. The moon’s southern limb lies 0.8 arc-minutes outside the edge of the umbral shadow.
Comment from Fred Espenak: This is an extraordinary test case for a marginally partial eclipse.
The times of the major eclipse phases are listed as follows. These times are in Universal Time (UTC); translate UTC to your time.
Penumbral Eclipse Begins: 06:02:09 UTC on November 19
Partial Eclipse Begins: 07:18:43 UTC (2:19 a.m. EST in North America)
Greatest Eclipse: 09:02:56 UTC (4:03 a.m. EST)
Partial Eclipse Ends: 10:47:07 UTC (5:47 a.m. EST)
Penumbral Eclipse Ends: 12:03:44 UTC (7:04 a.m. EST)
Bottom line: A partial lunar eclipse will occur on Friday, November 19, 2021 (overnight November 18 for North America). It will be visible from the Americas, North Europe, eastern Asia, Australia, and the Pacific. Find eclipse timings for your location at timeanddate.com.
Fred Espenak is a scientist emeritus at Goddard Space Flight Center. For decades, he has been NASA's expert on eclipses, and some of you may know him as Mr. Eclipse. Fred maintains NASA's official eclipse web site (eclipse.gsfc.nasa.gov) as well as his personal web site on eclipse photography (mreclipse.com). Now retired and living in rural Arizona, Fred spends most clear nights losing sleep and photographing the stars (astropixels.com). His latest website is devoted to helping you enjoy eclipses (www.eclipsewise.com). He is an EarthSky content partner.