imported>BunnysBot: Fix CW Errors with GenFixes (T1)

2025-06-02T12:36:46Z

New page

{{Short description|Penumbral lunar eclipse September 27, 1977}}
{{Infobox lunar eclipse
| type = penumbral
| image = Lunar eclipse chart close-1977Sep27.png
| caption = The Moon's hourly motion shown right to left
| date = September 27, 1977
| gamma = 1.0768
| magnitude = −0.1361
| saros_ser = 117
| saros_no = 50 of 72
| penumbral = 257 minutes, 30 seconds
| p1 = 6:20:33
| greatest = 8:29:20
| p4 = 10:38:03
| previous = April 1977
| next = March 1978
}}
A penumbral [[lunar eclipse]] occurred at the Moon’s [[Lunar node|descending node]] of orbit on Tuesday, September 27, 1977,<ref>{{cite web|title=September 26–27, 1977 Penumbral Lunar Eclipse|url=https://www.timeanddate.com/eclipse/lunar/1977-september-27|publisher=timeanddate|access-date=4 January 2025}}</ref> with an umbral [[Magnitude of eclipse|magnitude]] of −0.1361. A lunar eclipse occurs when the [[Moon]] moves into the [[Earth's shadow]], causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. 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. Occurring about 6.25 days before [[Apsis|apogee]] (on October 3, 1977, at 14:45 UTC), the Moon's apparent diameter was smaller.<ref>{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=1977&n=136|publisher=timeanddate|access-date=4 January 2025}}</ref>

== Visibility ==
The eclipse was completely visible over [[North America]], northwestern [[South America]], and the central and eastern [[Pacific Ocean]], seen rising over [[east Asia|east]] and [[northeast Asia]] and [[Australia]] and setting over much of [[South America]] and the [[Atlantic Ocean]].<ref>{{cite web|title=Penumbral Lunar Eclipse of 1977 Sep 27|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1951/LE1977Sep27N.pdf|publisher=NASA|access-date=4 January 2025}}</ref>

{| class=wikitable
|[[File:Lunar eclipse from moon-1977Sep27.png|300px]] [[File:Lunar eclipse chart close-1977Sep27.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=Penumbral Lunar Eclipse of 1977 Sep 27|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1977Sep27Nprime.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 27, 1977 Lunar Eclipse Parameters
! Parameter
! Value
|-
| Penumbral Magnitude
| 0.90076
|-
| Umbral Magnitude
| −0.13605
|-
| Gamma
| 1.07682
|-
| Sun Right Ascension
| 12h15m08.1s
|-
| Sun Declination
| -01°38'19.9"
|-
| Sun Semi-Diameter
| 15'57.6"
|-
| Sun Equatorial Horizontal Parallax
| 08.8"
|-
| Moon Right Ascension
| 00h13m53.7s
|-
| Moon Declination
| +02°36'15.1"
|-
| Moon Semi-Diameter
| 15'23.6"
|-
| Moon Equatorial Horizontal Parallax
| 0°56'29.6"
|-
| ΔT
| 48.3 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 September–October 1977
! September 27 Descending node (full moon) !! [[Solar eclipse of October 12, 1977|October 12]] Ascending node (new moon) 
|-
| [[File:Lunar eclipse chart close-1977Sep27.png|200px]] || [[File:SE1977Oct12T.png|200px]]
|- align=center
| [[Lunar eclipse#Types of lunar eclipse|Penumbral lunar eclipse]] Lunar Saros 117 || [[Total eclipse#Types|Total solar eclipse]] Solar Saros 143
|}

== Related eclipses ==
=== Eclipses in 1977 ===
* [[April 1977 lunar eclipse|A partial lunar eclipse on April 4]].
* [[Solar eclipse of April 18, 1977|An annular solar eclipse on April 18]].
* '''A penumbral lunar eclipse on September 27.'''
* [[Solar eclipse of October 12, 1977|A total solar eclipse on October 12]].

=== Metonic ===
* Preceded by: [[December 1973 lunar eclipse|Lunar eclipse of December 10, 1973]]
* Followed by: [[July 1981 lunar eclipse|Lunar eclipse of July 17, 1981]]

=== Tzolkinex ===
* Preceded by: [[August 1970 lunar eclipse|Lunar eclipse of August 17, 1970]]
* Followed by: [[November 1984 lunar eclipse|Lunar eclipse of November 8, 1984]]

=== Half-Saros ===
* Preceded by: [[Solar eclipse of September 22, 1968]]
* Followed by: [[Solar eclipse of October 3, 1986]]

=== Tritos ===
* Preceded by: [[October 1966 lunar eclipse|Lunar eclipse of October 29, 1966]]
* Followed by: [[August 1988 lunar eclipse|Lunar eclipse of August 27, 1988]]

=== Lunar Saros 117 ===
* Preceded by: [[September 1959 lunar eclipse|Lunar eclipse of September 17, 1959]]
* Followed by: [[October 1995 lunar eclipse|Lunar eclipse of October 8, 1995]]

=== Inex ===
* Preceded by: [[October 1948 lunar eclipse|Lunar eclipse of October 18, 1948]]
* Followed by: [[September 2006 lunar eclipse|Lunar eclipse of September 7, 2006]]

=== Triad ===
* Preceded by: [[November 1890 lunar eclipse|Lunar eclipse of November 26, 1890]]
* Followed by: [[July 2064 lunar eclipse|Lunar eclipse of July 28, 2064]]

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

=== Saros 117 ===
{{Lunar Saros series 117}}

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

=== Inex series ===
{{Lunar Inex series September 2006}}

=== 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 124]].
{| class=wikitable
![[Solar eclipse of September 22, 1968|September 22, 1968]]
![[Solar eclipse of October 3, 1986|October 3, 1986]]
|-
|[[File:SE1968Sep22T.png|240px]]
|[[File:SE1986Oct03H.png|240px]]
|}

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

== Notes ==
{{reflist}}

== External links ==
* {{LEplot1951 link|1977|Sep|27|N}}

{{Lunar eclipses}}

{{DEFAULTSORT:Lunar eclipse 1977-09}}
[[Category:20th-century lunar eclipses|1977-09]]
[[Category:1977 in science]]
[[Category:September 1977]]

September 1977 lunar eclipse - Revision history

imported>BunnysBot: Fix CW Errors with GenFixes (T1)