en August 1969 lunar eclipse

August 1969 lunar eclipse
Penumbral eclipse
	The Moon's hourly motion shown right to left
Date	August 27, 1969
Gamma	−1.5407
Magnitude	−0.9514
Saros cycle	108 (72 of 72)
Penumbral	31 minutes, 16 seconds
P1
Contacts (UTC)
P1	10:31:50
Greatest	10:47:35
P4	11:03:06
	← April 1969 September 1969 →

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Wednesday, August 27, 1969,^[1] 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.^[2]

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.^[3]

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.^[4]

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.

Eclipse season of August–September 1969
August 27 Ascending node (full moon)	September 11 Descending node (new moon)	September 25 Ascending node (full moon)

Penumbral lunar eclipse Lunar Saros 108	Annular solar eclipse Solar Saros 134	Penumbral lunar eclipse Lunar Saros 146

Related eclipses

Lunar eclipses of 1969–1973

This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.^[5]

The penumbral lunar eclipses on April 2, 1969 and September 25, 1969 occur in the previous lunar year eclipse set, and the lunar eclipses on June 15, 1973 (penumbral) and December 10, 1973 (partial) occur in the next lunar year eclipse set.

Lunar eclipse series sets from 1969 to 1973
Ascending node				Descending node
Saros	Date Viewing	Type Chart	Gamma	Saros	Date Viewing	Type Chart	Gamma
108	1969 Aug 27	Penumbral	−1.5407	113	1970 Feb 21	Partial	0.9620
118	1970 Aug 17	Partial	−0.8053	123	1971 Feb 10	Total	0.2741
128	1971 Aug 06	Total	−0.0794	133	1972 Jan 30	Total	−0.4273
138	1972 Jul 26	Partial	0.7117	143	1973 Jan 18	Penumbral	−1.0845
148	1973 Jul 15	Penumbral	1.5178