A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, November 19, 2021, with an umbral magnitude of 0.9760. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. Occurring only about 12 hours before apogee (on November 20, 2021, at 21:10 UTC), the Moon's apparent diameter was smaller. This was the longest partial lunar eclipse since February 18, 1440, and the longest until February 8, 2669; however, many eclipses, including the November 2022 lunar eclipse, have a longer period of umbral contact at next to 3 hours 40 minutes. It was often referred to as a "Beaver Blood Moon" although not technically fulfilling the criteria for a true blood moon (totality). This lunar eclipse was the second of an almost tetrad, with the others being on May 26, 2021 (total); May 16, 2022 (total); and November 8, 2022 (total).

Visibility

The eclipse was completely visible over northeast Asia, the Pacific Ocean, and North America, seen rising over east Asia and Australia and setting over South America.

Gallery

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.

Eclipse season

This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight.

Related eclipses

Eclipses in 2021

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 126

Inex

Triad

Lunar eclipses of 2020–2023

Tritos series

Saros 126

Metonic series

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two total solar eclipses of Solar Saros 133.