August 1969 lunar eclipse

{{Infobox lunar eclipse

| type = penumbral

| image = Lunar eclipse chart close-1969Aug27.png

| caption = The Moon's hourly motion shown right to left

| date = August 27, 1969

| gamma = −1.5407

| magnitude = −0.9514

| saros_ser = 108

| saros_no = 72 of 72

| penumbral = 31 minutes, 16 seconds

| p1 = 10:31:50

| greatest = 10:47:35

| p4 = 11:03:06

| previous = April 1969

| next = September 1969

}}

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Wednesday, August 27, 1969,{{cite web|title=August 27, 1969 Penumbral Lunar Eclipse|url=https://www.timeanddate.com/eclipse/lunar/1969-august-27|publisher=timeanddate|access-date=2 January 2025}} with an umbral magnitude of −0.9514. 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 2.25 days after perigee (on August 25, 1969, at 16:30 UTC), the Moon's apparent diameter was larger.{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=1969&n=136|publisher=timeanddate|access-date=2 January 2025}}

This was the last lunar eclipse of Lunar Saros 108.

Visibility

The eclipse was completely visible over east and northeast Asia, Australia, western and central North America, western South America, and Antarctica.{{cite web|title=Penumbral Lunar Eclipse of 1969 Aug 27|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1951/LE1969Aug27N.pdf|publisher=NASA|access-date=2 January 2025}}

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Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.{{cite web|title=Penumbral Lunar Eclipse of 1969 Aug 27|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1969Aug27Nprime.html|publisher=EclipseWise.com|access-date=2 January 2025}}

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|+August 27, 1969 Lunar Eclipse Parameters

! Parameter

! Value

Penumbral Magnitude

| 0.01337

Umbral Magnitude

| −0.95141

Gamma

| −1.54066

Sun Right Ascension

| 10h23m30.2s

Sun Declination

| +10°03'05.7"

Sun Semi-Diameter

| 15'50.0"

Sun Equatorial Horizontal Parallax

| 08.7"

Moon Right Ascension

| 22h26m20.1s

Moon Declination

| -11°25'58.1"

Moon Semi-Diameter

| 16'24.7"

Moon Equatorial Horizontal Parallax

| 1°00'13.8"

ΔT

| 39.8 s

Eclipse season

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. The first and last eclipse in this sequence is separated by one synodic month.

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|+ Eclipse season of August–September 1969

! August 27
Ascending node (full moon)
!! September 11
Descending node (new moon)
!! September 25
Ascending node (full moon)

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| Penumbral lunar eclipse
Lunar Saros 108

Annular solar eclipse
Solar Saros 134

Penumbral lunar eclipse
Lunar Saros 146