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{{Short description|Total lunar eclipse September 6, 1979}}
{{Use dmy dates|date=January 2019}}
{{Infobox lunar eclipse
| type = total
| image = Lunar eclipse chart close-1979Sep06.png
| caption = The Moon's hourly motion shown right to left
| date = September 6, 1979
| gamma = −0.4305
| magnitude = 1.0936
| saros_ser = 137
| saros_no = 26 of 81
| totality = 44 minutes, 25 seconds
| partiality = 191 minutes, 52 seconds
| penumbral = 305 minutes, 9 seconds
| p1 = 8:21:37
| u1 = 9:18:15
| u2 = 10:31:59
| greatest = 10:54:12
| u3 = 11:16:24
| u4 = 12:30:08
| p4 = 13:26:45
| previous = March 1979
| next = March 1980
}}
A total [[lunar eclipse]] occurred at the Moon’s [[Lunar node|descending node]] of orbit on Thursday, September 6, 1979,<ref>{{cite web|title=September 5–6, 1979 Total Lunar Eclipse (Blood Moon)|url=https://www.timeanddate.com/eclipse/lunar/1979-september-6|publisher=timeanddate|access-date=4 January 2025}}</ref> with an umbral [[Magnitude of eclipse|magnitude]] of 1.0936. 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 5 hours after [[Apsis|perigee]] (on September 6, 1979, at 6:00 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=1979&n=136|publisher=timeanddate|access-date=4 January 2025}}</ref>

== Visibility ==
The eclipse was completely visible over eastern [[Australia]], western [[North America]], and the central and eastern [[Pacific Ocean]], seen rising over the eastern half of [[Asia]] and western Australia and setting over North and [[South America]].<ref>{{cite web|title=Total Lunar Eclipse of 1979 Sep 06|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1951/LE1979Sep06T.pdf|publisher=NASA|access-date=4 January 2025}}</ref>

{| class=wikitable
|[[File:Lunar eclipse from moon-1979Sep06.png|300px]] [[File:Lunar eclipse chart close-1979Sep06.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 1979 Sep 06|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1979Sep06Tprime.html|publisher=EclipseWise.com|access-date=4 January 2025}}</ref>

{|class="wikitable" align="{{{align|left}}}" style="margin:{{#ifeq:{{{align}}}|right|0 0 0.5em 1em|0 1em 0.5em 0}}"
|+September 6, 1979 Lunar Eclipse Parameters
! Parameter
! Value
|-
| Penumbral Magnitude
| 2.04211
|-
| Umbral Magnitude
| 1.09358
|-
| Gamma
| −0.43050
|-
| Sun Right Ascension
| 10h58m17.1s
|-
| Sun Declination
| +06°34'46.5"
|-
| Sun Semi-Diameter
| 15'52.1"
|-
| Sun Equatorial Horizontal Parallax
| 08.7"
|-
| Moon Right Ascension
| 22h58m48.1s
|-
| Moon Declination
| -07°00'03.6"
|-
| Moon Semi-Diameter
| 16'43.7"
|-
| Moon Equatorial Horizontal Parallax
| 1°01'23.8"
|-
| ΔT
| 50.2 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 August–September 1979
! [[Solar eclipse of August 22, 1979|August 22]] Ascending node (new moon) !! September 6 Descending node (full moon) 
|-
| [[File:SE1979Aug22A.png|200px]] || [[File:Lunar eclipse chart close-1979Sep06.png|200px]]
|- align=center
| [[Total eclipse#Types|Annular solar eclipse]] Solar Saros 125 || [[Lunar eclipse#Types of lunar eclipse|Total lunar eclipse]] Lunar Saros 137
|}

== Related eclipses ==
=== Eclipses in 1979 ===
* [[Solar eclipse of February 26, 1979|A total solar eclipse on February 26]].
* [[March 1979 lunar eclipse|A partial lunar eclipse on March 13]].
* [[Solar eclipse of August 22, 1979|An annular solar eclipse on August 22]].
* '''A total lunar eclipse on September 6.'''

=== Metonic ===
* Preceded by: [[November 1975 lunar eclipse|Lunar eclipse of November 18, 1975]]
* Followed by: [[June 1983 lunar eclipse|Lunar eclipse of June 25, 1983]]

=== Tzolkinex ===
* Preceded by: [[July 1972 lunar eclipse|Lunar eclipse of July 26, 1972]]
* Followed by: [[October 1986 lunar eclipse|Lunar eclipse of October 17, 1986]]

=== Half-Saros ===
* Preceded by: [[Solar eclipse of August 31, 1970]]
* Followed by: [[Solar eclipse of September 11, 1988]]

=== Tritos ===
* Preceded by: [[October 1968 lunar eclipse|Lunar eclipse of October 6, 1968]]
* Followed by: [[August 1990 lunar eclipse|Lunar eclipse of August 6, 1990]]

=== Lunar Saros 137 ===
* Preceded by: [[August 1961 lunar eclipse|Lunar eclipse of August 26, 1961]]
* Followed by: [[September 1997 lunar eclipse|Lunar eclipse of September 16, 1997]]

=== Inex ===
* Preceded by: [[September 1950 lunar eclipse|Lunar eclipse of September 26, 1950]]
* Followed by: [[August 2008 lunar eclipse|Lunar eclipse of August 16, 2008]]

=== Triad ===
* Preceded by: [[November 1892 lunar eclipse|Lunar eclipse of November 4, 1892]]
* Followed by: [[July 2066 lunar eclipse|Lunar eclipse of July 7, 2066]]

=== Lunar eclipses of 1977–1980 ===
{{Lunar eclipse set 1977-1980}}

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

=== Tritos series ===
{{Lunar Tritos series July 2001}}

=== Inex series ===
{{Lunar Inex series August 2008}}

=== 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 144]].
{| class=wikitable
![[Solar eclipse of August 31, 1970|August 31, 1970]]
![[Solar eclipse of September 11, 1988|September 11, 1988]]
|-
|[[File:SE1970Aug31A.png|240px]]
|[[File:SE1988Sep11A.png|240px]]
|}

== See also ==
*[[List of lunar eclipses]]
*[[List of 20th-century lunar eclipses]]
*[[Solar eclipse of February 26, 1979]]

== Notes ==
{{reflist}}

== External links ==
* {{LEplot1951 link|1979|Sep|06|T}}
* [https://web.archive.org/web/20091019053631/http://www.carsoncity.k12.mi.us/~chuck_peirce/cs1.html September 6, 1979, a Lunar Eclipse]
{{Lunar eclipses}}

{{DEFAULTSORT:Lunar eclipse 1979-09}}
[[Category:20th-century lunar eclipses|1979-09]]
[[Category:1979 in science]]
[[Category:September 1979]]

September 1979 lunar eclipse - Revision history

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