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{{Short description|Total lunar eclipse May 3, 1939}}
{{Infobox lunar eclipse
| type = total
| image = Lunar eclipse chart close-1939May03.png
| caption = The Moon's hourly motion shown right to left
| date = May 3, 1939
| gamma = 0.3693
| magnitude = 1.1765
| saros_ser = 130
| saros_no = 30 of 72
| totality = 62 minutes, 23 seconds
| partiality = 207 minutes, 3 seconds
| penumbral = 333 minutes, 31 seconds
| p1 = 12:24:35
| u1 = 13:27:45
| u2 = 14:40:06
| greatest = 15:11:18
| u3 = 15:42:28
| u4 = 16:54:48
| p4 = 17:58:06
| previous = November 1938
| next = October 1939
}}
A total [[lunar eclipse]] occurred at the Moon’s [[Lunar node|ascending node]] of orbit on Wednesday, May 3, 1939,<ref>{{cite web|title=May 3–4, 1939 Total Lunar Eclipse (Blood Moon)|url=https://www.timeanddate.com/eclipse/lunar/1939-may-3|publisher=timeanddate|access-date=18 December 2024}}</ref> with an umbral [[Magnitude of eclipse|magnitude]] of 1.1765. 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 about 5.2 days after [[Apsis|perigee]] (on April 28, 1939, at 11:05 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=1939&n=136|publisher=timeanddate|access-date=18 December 2024}}</ref>

This lunar eclipse was the third of an [[Tetrad (astronomy)|almost tetrad]], with the others being on [[May 1938 lunar eclipse|May 14, 1938]] (total); [[November 1938 lunar eclipse|November 7, 1938]] (total); and [[October 1939 lunar eclipse|October 28, 1939]] (partial).

== Visibility ==
The eclipse was completely visible over [[east Asia]], [[Australia]], and [[Antarctica]], seen rising over [[central Africa|central]] and [[east Africa]], [[eastern Europe]], and [[west Asia|west]], [[central Asia|central]], and [[south Asia]] and setting over western [[North America]] and the eastern [[Pacific Ocean]].<ref>{{cite web|title=Total Lunar Eclipse of 1939 May 03|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1901/LE1939May03T.pdf|publisher=NASA|access-date=18 December 2024}}</ref>

{| class=wikitable
|[[File:Lunar eclipse from moon-1939May03.png|300px]] [[File:Lunar eclipse chart close-1939May03.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 1939 May 03|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1939May03Tprime.html|publisher=EclipseWise.com|access-date=18 December 2024}}</ref>

{|class="wikitable" align="{{{align|left}}}" style="margin:{{#ifeq:{{{align}}}|right|0 0 0.5em 1em|0 1em 0.5em 0}}"
|+May 3, 1939 Lunar Eclipse Parameters
! Parameter
! Value
|-
| Penumbral Magnitude
| 2.18417
|-
| Umbral Magnitude
| 1.17649
|-
| Gamma
| 0.36934
|-
| Sun Right Ascension
| 02h39m22.9s
|-
| Sun Declination
| +15°31'43.2"
|-
| Sun Semi-Diameter
| 15'51.8"
|-
| Sun Equatorial Horizontal Parallax
| 08.7"
|-
| Moon Right Ascension
| 14h39m41.4s
|-
| Moon Declination
| -15°10'51.4"
|-
| Moon Semi-Diameter
| 15'44.6"
|-
| Moon Equatorial Horizontal Parallax
| 0°57'46.6"
|-
| ΔT
| 24.2 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 April–May 1939
! [[Solar eclipse of April 19, 1939|April 19]]<br/>Descending node (new moon) !! May 3<br/>Ascending node (full moon)
|-
| [[File:SE1939Apr19A.png|200px]] || [[File:Lunar eclipse chart close-1939May03.png|200px]]
|- align=center
| [[Total eclipse#Types|Annular solar eclipse]]<br />Solar Saros 118 || [[Lunar eclipse#Types of lunar eclipse|Total lunar eclipse]]<br />Lunar Saros 130
|}

== Related eclipses ==
=== Eclipses in 1939 ===
* [[Solar eclipse of April 19, 1939|An annular solar eclipse on April 19]].
* '''A total lunar eclipse on May 3.'''
* [[Solar eclipse of October 12, 1939|A total solar eclipse on October 12]].
* [[October 1939 lunar eclipse|A partial lunar eclipse on October 28]].

=== Metonic ===
* Preceded by: [[July 1935 lunar eclipse|Lunar eclipse of July 16, 1935]]
* Followed by: [[February 1943 lunar eclipse|Lunar eclipse of February 20, 1943]]

=== Tzolkinex ===
* Preceded by: [[March 1932 lunar eclipse|Lunar eclipse of March 22, 1932]]
* Followed by: [[June 1946 lunar eclipse|Lunar eclipse of June 14, 1946]]

=== Half-Saros ===
* Preceded by: [[Solar eclipse of April 28, 1930]]
* Followed by: [[Solar eclipse of May 9, 1948]]

=== Tritos ===
* Preceded by: [[June 1928 lunar eclipse|Lunar eclipse of June 3, 1928]]
* Followed by: [[April 1950 lunar eclipse|Lunar eclipse of April 2, 1950]]

=== Lunar Saros 130 ===
* Preceded by: [[April 1921 lunar eclipse|Lunar eclipse of April 22, 1921]]
* Followed by: [[May 1957 lunar eclipse|Lunar eclipse of May 13, 1957]]

=== Inex ===
* Preceded by: [[May 1910 lunar eclipse|Lunar eclipse of May 24, 1910]]
* Followed by: [[April 1968 lunar eclipse|Lunar eclipse of April 13, 1968]]

=== Triad ===
* Preceded by: [[July 1852 lunar eclipse|Lunar eclipse of July 1, 1852]]
* Followed by: [[March 2026 lunar eclipse|Lunar eclipse of March 3, 2026]]

=== Lunar eclipses of 1937–1940 ===
{{Lunar eclipse set 1937-1940}}

=== Saros 130 ===
{{Lunar Saros series 130}}

=== Tritos series ===
{{Lunar Tritos series October 2004}}

=== Inex series ===
{{Lunar Inex series March 2026}}

=== 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 solar eclipses of [[Solar Saros 137]].
{| class=wikitable
![[Solar eclipse of April 28, 1930|April 28, 1930]]
![[Solar eclipse of May 9, 1948|May 9, 1948]]
|-
|[[File:SE1930Apr28H.png|240px]]
|[[File:SE1948May09A.png|240px]]
|}

==See also==
*[[List of lunar eclipses]]
*[[List of 20th-century lunar eclipses]]

==Notes==
{{reflist}}

==External links==
*{{LEplot1901 link|1939|May|03|T}}

{{Lunar eclipses}}

{{DEFAULTSORT:Lunar eclipse 1939-05}}
[[Category:20th-century lunar eclipses|1939-05]]
[[Category:1939 in science]]

May 1939 lunar eclipse - Revision history

imported>BunnysBot: Fix CW Errors with GenFixes (T1), removed stub tag