A partial

lunar eclipse A lunar eclipse is an astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. Such an alignment occurs during an eclipse season, approximately every six months, during the full moon phase, ...

occurred at the Moon’s

ascending node An orbital node is either of the two points where an orbit intersects a plane of reference to which it is inclined. A non-inclined orbit, which is contained in the reference plane, has no nodes. Planes of reference Common planes of referenc ...

of orbit on Friday, November 19, 2021, with an umbral

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

of 0.9760. A lunar eclipse occurs when the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

moves into the

Earth's shadow Earth's shadow (or Earth shadow) is the shadow that Earth itself casts through its atmosphere and into outer space, toward the antisolar point. During the twilight period (both early dusk and late dawn), the shadow's visible fringe – someti ...

, 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 A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially. Such an alignment occurs approximately every six months, during the eclipse season i ...

, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the

night Night, or nighttime, is the period of darkness when the Sun is below the horizon. Sunlight illuminates one side of the Earth, leaving the other in darkness. The opposite of nighttime is daytime. Earth's rotation causes the appearance of ...

side of Earth. Occurring only about 12 hours before

apogee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values. Apsides perta ...

(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 A total lunar eclipse occurred at the Moon’s Lunar node, ascending node of orbit on Tuesday, November 8, 2022, with an umbral Magnitude of eclipse, magnitude of 1.3607. It was a List of central lunar eclipses, central lunar eclipse, in which pa ...

, 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 Northeast Asia or Northeastern Asia is a geographical Subregion#Asia, subregion of Asia. Its northeastern landmass and islands are bounded by the Pacific Ocean, North Pacific Ocean. The term Northeast Asia was popularized during the 1930s by Ame ...

, the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

, and

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

, seen rising over

east Asia East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Ja ...

and

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

and setting over

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

Gallery

File:Lunar eclipse of 2021 November 19 - Madrid, Spain.jpg,

Madrid, Spain Madrid ( ; ) is the capital and List of largest cities in Spain, most populous municipality of Spain. It has almost 3.5 million inhabitants and a Madrid metropolitan area, metropolitan area population of approximately 7 million. It i ...

, 7:29 UTC File:211119 Lunar Eclipse in Nara.jpg,

Nara City is the capital city of Nara Prefecture, Japan. , Nara has an estimated population of 367,353 according to World Population Review, making it the largest city in Nara Prefecture and sixth-largest in the Kansai region of Honshu. Nara is a Core ...

, Japan, 8:51 UTC File:Eclipsenov19.jpg,

Toronto, Ontario Toronto ( , locally pronounced or ) is the List of the largest municipalities in Canada by population, most populous city in Canada. It is the capital city of the Provinces and territories of Canada, Canadian province of Ontario. With a p ...

, 8:53 UTC File:Partial Lunar eclipse at Maximum.jpg,

Warrenton, Virginia Warrenton is a town in Fauquier County, Virginia, United States. It is the county seat. The population was 10,057 as of the 2020 United States census, 2020 census, an increase from 9,611 at the 2010 United States Census, 2010 census and 6,670 at ...

, 9:01 UTC File:November 2021 Partial Lunar Eclipse.jpg,

New Plymouth, New Zealand New Plymouth () is the major city of the Taranaki region on the west coast of the North Island of New Zealand. It is named after the English city of Plymouth, in Devon, from where the first English settlers to New Plymouth migrated. The New ...

, 9:03 UTC File:Lunar Eclipse 2021, Santa Fe, New Mexico.jpg,

Santa Fe, New Mexico Santa Fe ( ; , literal translation, lit. "Holy Faith") is the capital city, capital of the U.S. state of New Mexico, and the county seat of Santa Fe County. With over 89,000 residents, Santa Fe is the List of municipalities in New Mexico, fourt ...

, 9:03 UTC File:Partial Lunar Eclipse 2021 November 19 - Near Maximum from Jayapura, Indonesia.jpg, Jayapura, Indonesia, 9:04 UTC File:Partial lunar eclipse (19-11-2021) (cropped).png,

Mexico City, Mexico Mexico City is the capital city, capital and List of cities in Mexico, largest city of Mexico, as well as the List of North American cities by population, most populous city in North America. It is one of the most important cultural and finan ...

, 9:08 UTC File:Partial Lunar Eclipse November 2021.jpg,

Killingly, Connecticut Killingly is a New England town, town in Windham County, Connecticut, Windham County, Connecticut, United States. Killingly is the largest town by population in the Northeastern Connecticut Planning Region, Connecticut, Northeastern Connecticut ...

, 9:12 UTC File:Partiallunareclipse.jpg,

Dayton, Ohio Dayton () is a city in Montgomery County, Ohio, United States, and its county seat. It is the List of cities in Ohio, sixth-most populous city in Ohio, with a population of 137,644 at the 2020 United States census, 2020 census. The Dayton metro ...

, 9:25 UTC File:Partial Lunar Eclipse of November, 2021.jpg, Hefei, China, 10:35 UTC File:202111 Lunar Eclipse.jpg, Eclipse progression as seen from

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

File:20211119 Lunar Eclipse, Weifang, Shandong, China.webm, Weifang, China, taken began at 10:31 UTC

Eclipse details

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

Eclipse season

This eclipse is part of an

eclipse season An eclipse season is a period, roughly every six months, when eclipses occur. Eclipse seasons are the result of the axial parallelism of the Orbit of the Moon, Moon's orbital plane (orbital inclination, tilted five degrees to the ecliptic, Earth ...

, 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 A fortnight is a unit of time equal to 14 days (two weeks). The word derives from the Old English term , meaning "" (or "fourteen days", since the Anglo-Saxons counted by nights). Astronomy and tides In astronomy, a ''lunar fortnight'' is hal ...

Related eclipses

Eclipses in 2021

* A total lunar eclipse on May 26. * An annular solar eclipse on June 10. * A partial lunar eclipse on November 19. * A total solar eclipse on December 4.

Metonic

* Preceded by: Lunar eclipse of January 31, 2018 * Followed by: Lunar eclipse of September 7, 2025

Tzolkinex

* Preceded by: Lunar eclipse of October 8, 2014 * Followed by: Lunar eclipse of December 31, 2028

Half-Saros

* Preceded by:

Solar eclipse of November 13, 2012 A total solar eclipse occurred at the Moon's ascending node of orbit between Tuesday, November 13 and Wednesday, November 14, 2012, with a magnitude of 1.05. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally o ...

* Followed by:

Solar eclipse of November 25, 2030 A total solar eclipse will occur at the Moon's ascending node of orbit on Monday, November 25, 2030, with a magnitude of 1.0468. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image o ...

Tritos

* Preceded by: Lunar eclipse of December 21, 2010 * Followed by: Lunar eclipse of October 18, 2032

Lunar Saros 126

* Preceded by: Lunar eclipse of November 9, 2003 * Followed by: Lunar eclipse of November 30, 2039

Inex

* Preceded by: Lunar eclipse of December 9, 1992 * Followed by: Lunar eclipse of October 30, 2050

Triad

* Preceded by: Lunar eclipse of January 19, 1935 * Followed by: Lunar eclipse of September 20, 2108

Lunar eclipses of 2020–2023

Metonic series

* First eclipse: November 20, 2002. * Second eclipse: November 19, 2021. * Third eclipse: November 18, 2040. * Fourth eclipse: November 19, 2059. * Fifth eclipse: November 19, 2078.

Saros 126

Tritos series

Inex 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).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros'' This lunar eclipse is related to two total solar eclipses of Solar Saros 133.

References

External links

*
Saros cycle 126
{{DEFAULTSORT:Lunar eclipse 2021-11 2021-11 2021 in science November 2021