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{{Short description|Central lunar eclipse}}
{{Infobox lunar eclipse
| type = total
| image = Lunar eclipse chart close-2051Oct19.png
| caption = The Moon's hourly motion shown right to left
| date = October 19, 2051
| gamma = −0.2542
| magnitude = 1.4130
| saros_ser = 137
| saros_no = 28 of 78
| totality = 83 minutes, 34 seconds
| partiality = 204 minutes, 17 seconds
| penumbral = 314 minutes, 11 seconds
| p1 = 16:33:07
| u1 = 17:28:05
| u2 = 18:28:26
| greatest = 19:10:13
| u3 = 19:52:00
| u4 = 20:52:21
| p4 = 21:47:18
| previous = April 2051
| next = April 2052
}}
A total [[lunar eclipse]] will occur at the Moon’s [[Lunar node|descending node]] of orbit on Thursday, October 19, 2051,<ref>{{cite web|title=October 19–20, 2051 Total Lunar Eclipse (Blood Moon)|url=https://www.timeanddate.com/eclipse/lunar/2051-october-19|publisher=timeanddate|access-date=12 December 2024}}</ref> with an umbral [[Magnitude of eclipse|magnitude]] of 1.4130. It will be a [[List of central lunar eclipses|central lunar eclipse]], in which part of the [[Moon]] will pass through the [[antisolar point|center]] of the [[Earth's shadow]]. 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 30 minutes after [[Apsis|perigee]] (on October 19, 2051, at 18:40 UTC), the Moon's apparent diameter will be larger.<ref>{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=2051&n=136|publisher=timeanddate|access-date=12 December 2024}}</ref>

This lunar eclipse is the last of a [[Tetrad (astronomy)|tetrad]], with four total lunar eclipses in series, the others being on [[May 2050 lunar eclipse|May 6, 2050]]; [[October 2050 lunar eclipse|October 30, 2050]]; and [[April 2051 lunar eclipse|April 26, 2051]].

This will be the first central eclipse of [[Lunar Saros 137|Saros series 137]]. Less than a day from perigee, the Moon's apparent diameter will be larger, and be considered a [[supermoon]].

== Visibility ==
The eclipse will be completely visible over [[east Africa]] and much of [[Europe]] and [[Asia]], seen rising over eastern [[South America]] and [[west Africa]] and setting over [[Australia]] and the western [[Pacific Ocean]].<ref>{{cite web|title=Total Lunar Eclipse of 2051 Oct 19|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot2051/LE2051Oct19T.pdf|publisher=NASA|access-date=12 December 2024}}</ref>

{| class=wikitable
|[[File:Lunar eclipse from moon-2051Oct19.png|300px]] [[File:Lunar eclipse chart close-2051Oct19.png|300px]]
|}

== Eclipse details ==
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.<ref>{{cite web|title=Total Lunar Eclipse of 2051 Oct 19|url=https://eclipsewise.com/lunar/LEprime/2001-2100/LE2051Oct19Tprime.html|publisher=EclipseWise.com|access-date=12 December 2024}}</ref>

{|class="wikitable" align="{{{align|left}}}" style="margin:{{#ifeq:{{{align}}}|right|0 0 0.5em 1em|0 1em 0.5em 0}}"
|+October 19, 2051 Lunar Eclipse Parameters
! Parameter
! Value
|-
| Penumbral Magnitude
| 2.37193
|-
| Umbral Magnitude
| 1.41297
|-
| Gamma
| −0.25423
|-
| Sun Right Ascension
| 13h37m47.1s
|-
| Sun Declination
| -10°10'03.3"
|-
| Sun Semi-Diameter
| 16'03.4"
|-
| Sun Equatorial Horizontal Parallax
| 08.8"
|-
| Moon Right Ascension
| 01h38m04.1s
|-
| Moon Declination
| +09°55'00.4"
|-
| Moon Semi-Diameter
| 16'44.6"
|-
| Moon Equatorial Horizontal Parallax
| 1°01'27.1"
|-
| ΔT
| 86.3 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 October 2051
! [[Solar eclipse of October 4, 2051|October 4]] Ascending node (new moon) !! October 19 Descending node (full moon) 
|-
| [[File:SE2051Oct04P.png|200px]] || [[File:Lunar eclipse chart close-2051Oct19.png|200px]]
|- align=center
| [[Total eclipse#Types|Partial solar eclipse]] Solar Saros 125 || [[Lunar eclipse#Types of lunar eclipse|Total lunar eclipse]] Lunar Saros 137
|}

== Related eclipses ==
=== Eclipses in 2051 ===
* [[Solar eclipse of April 11, 2051|A partial solar eclipse on April 11]].
* [[April 2051 lunar eclipse|A total lunar eclipse on April 26]].
* [[Solar eclipse of October 4, 2051|A partial solar eclipse on October 4]].
* '''A total lunar eclipse on October 19.'''

=== Metonic ===
* Preceded by: [[January 2048 lunar eclipse|Lunar eclipse of January 1, 2048]]
* Followed by: [[August 2055 lunar eclipse|Lunar eclipse of August 7, 2055]]

=== Tzolkinex ===
* Preceded by: [[September 2044 lunar eclipse|Lunar eclipse of September 7, 2044]]
* Followed by: [[November 2058 lunar eclipse|Lunar eclipse of November 30, 2058]]

=== Half-Saros ===
* Preceded by: [[Solar eclipse of October 14, 2042]]
* Followed by: [[Solar eclipse of October 24, 2060]]

=== Tritos ===
* Preceded by: [[November 2040 lunar eclipse|Lunar eclipse of November 18, 2040]]
* Followed by: [[September 2062 lunar eclipse|Lunar eclipse of September 18, 2062]]

=== Lunar Saros 137 ===
* Preceded by: [[October 2033 lunar eclipse|Lunar eclipse of October 8, 2033]]
* Followed by: [[October 2069 lunar eclipse|Lunar eclipse of October 30, 2069]]

=== Inex ===
* Preceded by: [[November 2022 lunar eclipse|Lunar eclipse of November 8, 2022]]
* Followed by: [[September 2080 lunar eclipse|Lunar eclipse of September 29, 2080]]

=== Triad ===
* Preceded by: [[December 1964 lunar eclipse|Lunar eclipse of December 19, 1964]]
* Followed by: [[August 2138 lunar eclipse|Lunar eclipse of August 20, 2138]]

=== Lunar eclipses of 2049–2052 ===
{{Lunar eclipse set 2049-2052}}

=== Saros 137 ===
{{Lunar Saros series 137}}

=== Tritos series ===
{{Lunar Tritos series February 2008}}

=== Inex series ===
{{Lunar Inex series November 2022}}

=== 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 total solar eclipses of [[Solar Saros 144]].
{| class=wikitable
![[Solar eclipse of October 14, 2042|October 14, 2042]]
![[Solar eclipse of October 24, 2060|October 24, 2060]]
|-
|[[File:SE2042Oct14A.png|240px]]
|[[File:SE2060Oct24A.png|240px]]
|}

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

== Notes ==
{{Reflist}}

== External links ==
* {{LEplot2051 link|2051|Oct|19|T}}

{{Lunar eclipses}}

{{DEFAULTSORT:Lunar eclipse 2051-10}}
[[Category:21st-century lunar eclipses|2051-10]]
[[Category:Future lunar eclipses|2051-10]]
[[Category:Central total lunar eclipses|2051-10]]
[[Category:2051 in science]]

October 2051 lunar eclipse - Revision history

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