imported>Hamterous1: /* Eclipse details */ lunar eclipse

2025-03-26T17:49:44Z

Eclipse details: lunar eclipse

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{{Short description|Total lunar eclipse of 26 May 2021}}
{{Use dmy dates|date=August 2018}}
{{Infobox lunar eclipse
| type = total
| image = May 2021 Lunar Eclipse Totality, Mountain View, USA.jpg
| caption = Totality as viewed from [[Mountain View, California]] at 11:23 UTC, end of totality
| date = May 26, 2021
| gamma = 0.4774
| magnitude = 1.0112
| saros_ser = 121
| saros_no = 55 of 82
| totality = 14 minutes, 30 seconds
| partiality = 187 minutes, 25 seconds
| penumbral = 302 minutes, 2 seconds
| p1 = 8:47:39
| u1 = 9:44:57
| u2 = 11:11:25
| greatest = 11:18:40
| u3 = 11:25:55
| u4 = 12:52:22
| p4 = 13:49:41
| previous = November 2020
| next = November 2021
}}
[[File:May 2021 lunar eclipse animation.gif|thumb|right|This animation shows the Moon moving west to east, passing into the shadow of Earth in [[Scorpius]] near the [[Milky Way]]. It first enters the outer penumbral shadow, and then the dark umbral shadow. Here, the brightness of the Moon is exaggerated within the umbral shadow. The southern part of the Moon is darkest due to it being closest to the centre of the shadow.]]

A total [[lunar eclipse]] occurred at the Moon’s [[Lunar node|descending node]] of orbit on Wednesday, May 26, 2021,<ref>{{cite web|title=May 25–26, 2021 Total Lunar Eclipse (Blood Moon)|url=https://www.timeanddate.com/eclipse/lunar/2021-may-26|publisher=timeanddate|access-date=18 November 2024}}</ref> with an umbral [[Magnitude of eclipse|magnitude]] of 1.0112. A lunar eclipse occurs when the [[Moon]] moves into the [[Earth's shadow]], causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's [[Umbra, penumbra and antumbra|shadow]] is smaller. Occurring only about 14 hours after [[Apsis|perigee]] (on May 25, 2021, at 21:50 UTC), the Moon's apparent diameter was larger.<ref>{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=2021&n=136|publisher=timeanddate|access-date=18 November 2024}}</ref>

It was the first total lunar eclipse since the [[January 2019 lunar eclipse]], and the first in a series of an ''almost tetrad'' (with four consecutive total or deep partial lunar eclipses).<ref>{{Cite web|title=26 May 2021 Total Lunar Eclipse (Blood Moon)|url=https://www.timeanddate.com/eclipse/lunar/2021-may-26/|url-status=live|access-date=26 May 2021|website=timeanddate.com|language=en|archive-date=25 May 2021|archive-url=https://web.archive.org/web/20210525235105/https://www.timeanddate.com/eclipse/lunar/2021-may-26}}</ref> The next total eclipse occurred in [[May 2022 lunar eclipse|May 2022]]. The event took place near lunar [[perigee]]; as a result, this [[supermoon]] was referred to in [[United States|US]] media coverage as a "super flower blood moon",<ref group=Note name=flowerNote/><ref>[https://www.space.com/super-flower-blood-moon-lunar-eclipse-2021-coming-soon Look up! The Super Flower Blood Moon lunar eclipse is coming 26 May] {{Webarchive|url=https://web.archive.org/web/20210524224525/https://www.space.com/super-flower-blood-moon-lunar-eclipse-2021-coming-soon |date=2021-05-24 }} www.space.com</ref><ref>{{Cite web|title=The 'Super Flower Blood Moon' Is About to Light Up Skies! How to Watch This Week's Celestial Event|url=https://people.com/human-interest/how-to-watch-super-flower-blood-moon-may-2021/|url-status=live|access-date=25 May 2021|website=People.com|language=en|archive-date=25 May 2021|archive-url=https://web.archive.org/web/20210525022613/https://people.com/human-interest/how-to-watch-super-flower-blood-moon-may-2021/}}</ref> and elsewhere as a "super blood moon".<ref>{{Cite web|title=Sydney takes 'pole position' in rare super blood moon display|url=https://www.smh.com.au/sydney-news/sydney-takes-poll-position-in-rare-super-blood-moon-display-20210526-p57vg6.html|url-status=live|access-date=27 May 2021|website=smh.com.au|date=26 May 2021|language=en|archive-date=26 May 2021|archive-url=https://web.archive.org/web/20210526132144/https://www.smh.com.au/sydney-news/sydney-takes-poll-position-in-rare-super-blood-moon-display-20210526-p57vg6.html}}</ref><ref>{{cite web|title=Catch the super flower blood moon last night? It may not have been all it was cracked up to be|url=https://www.abc.net.au/news/2021-05-27/super-moon-blood-flower-lunar-eclipse-name/100153804|access-date=27 May 2021|website=abc.net.au|date=26 May 2021|archive-date=2021-05-26|archive-url=https://web.archive.org/web/20210526233751/https://www.abc.net.au/news/2021-05-27/super-moon-blood-flower-lunar-eclipse-name/100153804|url-status=live}}</ref>

This lunar eclipse was the first of an [[Tetrad (astronomy)|almost tetrad]], with the others being on [[November 2021 lunar eclipse|November 19, 2021]] (partial); [[May 2022 lunar eclipse|May 16, 2022]] (total); and [[November 2022 lunar eclipse|November 8, 2022]] (total).

== Visibility ==
The eclipse was completely visible over [[Australia]] and the central [[Pacific Ocean]], seen rising over [[south Asia|south]] and [[east Asia]] and setting over [[North America|North]] and [[South America]].<ref>{{cite web|title=Total Lunar Eclipse of 2021 May 26|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2021May26T.pdf|publisher=NASA|access-date=18 November 2024}}</ref>

{| class=wikitable
|[[File:Lunar eclipse from moon-2021May26.png|315px]] [[File:Lunar eclipse chart close-2021May26.png|315px]]
|- align=center
|[[File:Visibility Lunar Eclipse 2021-05-26.png|640px]] Visibility map
|}

== Timing ==
Local times are recomputed here for the [[time zone]]s of the areas where the eclipse was visible:
{| class="wikitable"
|+ Local times of contacts
|- valign=top
! colspan=2 rowspan=2| Time Zone adjustments from [[UTC]]
! [[UTC+08:00|+8h]]
! [[UTC+10:00|+10h]]
! [[UTC+12:00|+12h]]
! [[UTC−10:00|-10h]]
! [[UTC−08:00|-8h]]
! [[UTC−07:00|-7h]]
! [[UTC−06:00|-6h]]
! [[UTC−05:00|-5h]]
! [[UTC−04:00|-4h]]
|- valign=top
! [[Australian Western Standard Time|AWST]]
! [[Australian Eastern Standard Time|AEST]]
! [[Time in New Zealand|NZST]]
! [[Hawaii–Aleutian Time Zone|HST]]
! [[Alaska Daylight Time|AKDT]]
! [[Pacific Daylight Time|PDT]]
! [[Mountain Daylight Time|MDT]]
! [[Central Time Zone (North America)|CDT]]
! [[Eastern Daylight Time|EDT]]
|- align=center
!colspan=2|Event
|colspan=4|Evening 26 May / Morning 27 May||colspan=8 BGCOLOR="#e0e0f0"|Morning 26 May
|- align=center
!P1
! Penumbral began
| 4:48 pm
| 6:48 pm
| 8:48 pm
| 10:48 pm
| BGCOLOR="#e0e0f0"| 12:48 am
| BGCOLOR="#e0e0f0"| 1:48 am
| BGCOLOR="#e0e0f0"| 2:48 am
| BGCOLOR="#e0e0f0"| 3:48 am
| BGCOLOR="#e0e0f0"| 4:48 am
|- align=center
!U1
! Partial began
| 5:45 pm
| 7:45 pm
| 9:45 pm
| 11:45 pm
| BGCOLOR="#e0e0f0"| 1:45 am
| BGCOLOR="#e0e0f0"| 2:45 am
| BGCOLOR="#e0e0f0"| 3:45 am
| BGCOLOR="#e0e0f0"| 4:45 am
| BGCOLOR="#e0e0f0"| 5:16 am
|- align=center
!U2
! Total began
| 7:11 pm
| 9:11 pm
| 11:11 pm
| BGCOLOR="#e0e0f0"|1:11 am
| BGCOLOR="#e0e0f0"|3:11 am
| BGCOLOR="#e0e0f0"|4:11 am
| BGCOLOR="#e0e0f0"|5:11 am
| BGCOLOR="#e0e0f0"|6:11 am
| Set
|- align=center
!
! Greatest eclipse
| 7:19 pm
| 9:19 pm
| 11:19 pm
| BGCOLOR="#e0e0f0"| 1:19 am
| BGCOLOR="#e0e0f0"| 3:19 am
| BGCOLOR="#e0e0f0"| 4:19 am
| BGCOLOR="#e0e0f0"| 5:19 am
| BGCOLOR="#e0e0f0"| 6:19 am
| Set
|- align=center
!U3
! Total ended
| 7:26 pm
| 9:26 pm
| 11:26 pm
| BGCOLOR="#e0e0f0"| 1:26 am
| BGCOLOR="#e0e0f0"| 3:26 am
| BGCOLOR="#e0e0f0"| 4:26 am
| BGCOLOR="#e0e0f0"| 5:26 am
| Set
| Set
|- align=center
!U4
! Partial ended
| 8:52 pm
| 10:52 pm
| BGCOLOR="#e0ffe0"| 12:52 am
| BGCOLOR="#e0e0f0"| 2:52 am
| BGCOLOR="#e0e0f0"| 4:52 am
| Set
| Set
| Set
| Set
|- align=center
!P4
! Penumbral ended
| 9:50 pm
| 11:50 pm
| BGCOLOR="#e0ffe0"| 1:50 am
| BGCOLOR="#e0e0f0"| 3:50 am
| BGCOLOR="#e0e0f0"| 5:50 am
| Set
| Set
| Set
| Set
|}
[[File:Lunar eclipse contact diagram.svg|thumb|Contact points relative to the Earth's umbral and penumbral shadows, here with the Moon near its descending node.]]
{{Total lunar eclipse contacts}}
{{Clear}}

== Gallery ==
<gallery>
File:View from the Cove Overlook Rest Area, Keyser's Ridge, Garrett, Maryland, May 26, 2021 156.jpg|[[Garrett County, Maryland]], 9:43 UTC
File:Partial lunar eclipse may26-2021-minneapolis-tlr1.jpg|[[Minneapolis]], Minnesota, 10:19 UTC
File:Incomplete lunar eclipse 10.52pm 26 May 2021 Berwick Forest NZ.jpg|[[Berwick Forest, New Zealand]], 10:52 UTC
File:Taiwan Taoyuan.jpg|[[Taoyuan, Taiwan|Taoyuan]], Taiwan, 11:02 UTC
File:Total Lunar Eclipse 2021-05-26, Near Totality (2).jpg|[[Banyuwangi (town)|Banyuwangi]], Indonesia, 11:03 UTC
File:Lunar Eclipse 2021 Canberra.jpg|[[Canberra]], Australia, 11:11 UTC
File:Lunar Eclipse in cloudy skies 2. .jpg|[[Manila]], Philippines, 11:13 UTC
File:5 26 2021 Lunar Eclipse from Laguna, Philippines at 1915 local time.jpg|[[Laguna (province)|Laguna]], Philippines, 11:15 UTC
File:Blood Moon (51203510962) (cropped).jpg|[[Geelong, Victoria]], 11:23 UTC
File:Lunar Eclipse Tarlac City Philippines 2021.jpg|[[Tarlac]], Philippines, 11:32 UTC
File:May 26 Lunar Eclipse Kediri.jpg|[[Kediri (city)|Kediri]], Indonesia, 11:32 UTC
File:26-05-2021 Lunar Eclipse from eastern Magetan, East Java, Indonesia.jpg|[[Magetan Regency|Magetan]], Indonesia, 11:34 UTC
File:Lunar Eclipse May 2021 NSW (1).jpg|[[New South Wales]], Australia, 12:01 UTC
File:Lunar Eclipse May 2021 NSW (2).jpg|[[New South Wales]], Australia, 12:21 UTC
File:Lunar Eclipse of May 26, 2021.jpg|[[Chennai]], India, 13:27 UTC
</gallery>

== Eclipse details ==
Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.<ref>{{cite web|title=Total Lunar Eclipse of 2021 May 26|url=https://eclipsewise.com/lunar/LEprime/2001-2100/LE2021May26Tprime.html|publisher=EclipseWise.com|access-date=18 November 2024}}</ref>

{|class="wikitable" align="{{{align|left}}}" style="margin:{{#ifeq:{{{align}}}|right|0 0 0.5em 1em|0 1em 0.5em 0}}"
|+May 26, 2021 Lunar Eclipse Parameters
! Parameter
! Value
|-
| Penumbral Magnitude
| 1.95575
|-
| Umbral Magnitude
| 1.01120
|-
| Gamma
| 0.47741
|-
| Sun Right Ascension
| 04h14m03.6s
|-
| Sun Declination
| +21°12'25.4"
|-
| Sun Semi-Diameter
| 15'47.3"
|-
| Sun Equatorial Horizontal Parallax
| 08.7"
|-
| Moon Right Ascension
| 16h14m37.8s
|-
| Moon Declination
| -20°44'15.0"
|-
| Moon Semi-Diameter
| 16'42.9"
|-
| Moon Equatorial Horizontal Parallax
| 1°01'20.5"
|-
| ΔT
| 70.0 s
|}
{{clear}}

== Eclipse season ==
{{See also|Eclipse cycle}}
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]].

{| class="wikitable"
|+ Eclipse season of May–June 2021
! [[May 2021 lunar eclipse|May 26]] Descending node (full moon) !! [[Solar eclipse of June 10, 2021|June 10]] Ascending node (new moon) 
|-
| [[File:Lunar eclipse chart close-2021May26.png|200px]] || [[File:SE2021Jun10A.png|200px]]
|- align=center
| [[Lunar eclipse#Types of lunar eclipse|Total lunar eclipse]] Lunar Saros 121 || [[Total eclipse#Types|Annular solar eclipse]] Solar Saros 147
|}

== Related eclipses ==
=== Eclipses in 2021 ===
* '''A total lunar eclipse on May 26.'''
* [[Solar eclipse of June 10, 2021|An annular solar eclipse on June 10]].
* [[November 2021 lunar eclipse|A partial lunar eclipse on November 19]].
* [[Solar eclipse of December 4, 2021|A total solar eclipse on December 4]].

=== Metonic ===
* Preceded by: [[August 2017 lunar eclipse|Lunar eclipse of August 7, 2017]]
* Followed by: [[March 2025 lunar eclipse|Lunar eclipse of March 14, 2025]]

=== Tzolkinex ===
* Preceded by: [[April 2014 lunar eclipse|Lunar eclipse of April 15, 2014]]
* Followed by: [[July 2028 lunar eclipse|Lunar eclipse of July 6, 2028]]

=== Half-Saros ===
* Preceded by: [[Solar eclipse of May 20, 2012]]
* Followed by: [[Solar eclipse of June 1, 2030]]

=== Tritos ===
* Preceded by: [[June 2010 lunar eclipse|Lunar eclipse of June 26, 2010]]
* Followed by: [[April 2032 lunar eclipse|Lunar eclipse of April 25, 2032]]

=== Lunar Saros 121 ===
* Preceded by: [[May 2003 lunar eclipse|Lunar eclipse of May 16, 2003]]
* Followed by: [[June 2039 lunar eclipse|Lunar eclipse of June 6, 2039]]

=== Inex ===
* Preceded by: [[June 1992 lunar eclipse|Lunar eclipse of June 15, 1992]]
* Followed by: [[May 2050 lunar eclipse|Lunar eclipse of May 6, 2050]]

=== Triad ===
* Preceded by: [[July 1934 lunar eclipse|Lunar eclipse of July 26, 1934]]
* Followed by: [[March 2108 lunar eclipse|Lunar eclipse of March 27, 2108]]

=== Lunar eclipses of 2020–2023 ===
{{Lunar eclipse set 2020-2023}}

=== Saros 121 ===
{{Lunar Saros series 121}}

=== Tritos series ===
{{Lunar Tritos series June 2010}}

=== Inex series ===
{{Lunar Inex series May 2021}}

=== Half-Saros cycle ===
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a [[Saros (astronomy)#Relationship between lunar and solar saros .28sar.29|half saros]]).<ref>Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros''</ref> This lunar eclipse is related to two annular solar eclipses of [[Solar Saros 128]].
{| class=wikitable
![[Solar eclipse of May 20, 2012|May 20, 2012]]
![[Solar eclipse of June 1, 2030|June 1, 2030]]
|-
|[[File:SE2012May20A.png|240px]]
|[[File:SE2030Jun01A.png|240px]]
|}

==See also==
*[[List of lunar eclipses]] and [[List of 21st-century lunar eclipses]]

==Notes==
{{reflist|group=Note|refs=
<ref name=flowerNote>A full moon occurring in May has been termed a "Flower moon" in the US as recorded in the ''[[Old Farmer's Almanac]]''.</ref>
}}

==References==
{{reflist}}
{{Commons category-inline|Lunar eclipse of 2021 May 26}}

{{Lunar eclipses}}

{{DEFAULTSORT:Lunar eclipse 2021-05}}
[[Category:21st-century lunar eclipses|2021-05]]
[[Category:Lunar eclipses|2021-05]]
[[Category:2021 in science]]
[[Category:May 2021]]

May 2021 lunar eclipse - Revision history

imported>Hamterous1: /* Eclipse details */ lunar eclipse