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August 1971 lunar eclipse

Total lunar eclipse August 6, 1971

Summary

Total lunar eclipse August 6, 1971

Field	Value
type	total
image	Lunar eclipse chart close-1971Aug06.png
caption	The Moon's hourly motion shown right to left
date	August 6, 1971
gamma	−0.0794
magnitude	1.7283
saros_ser	128
saros_no	38 of 71
totality	99 minutes, 25 seconds
partiality	215 minutes, 30 seconds
penumbral	327 minutes, 17 seconds
p1	16:59:29
u1	17:55:26
u2	18:53:28
greatest	19:43:10
u3	20:32:53
u4	21:30:56
p4	22:26:46
previous	February 1971
next	January 1972

A total lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, August 6, 1971, with an umbral magnitude of 1.7283. It was a central lunar eclipse, in which part of the Moon passed through the center of the Earth's shadow. 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 shadow is smaller. Occurring about 2.3 days before perigee (on August 9, 1971, at 2:00 UTC), the Moon's apparent diameter was larger.

Visibility

The eclipse was completely visible over central and east Africa, much of Asia, western Australia, and Antarctica, seen rising over central and eastern South America, Europe, and west Africa and setting over east and northeast Asia and eastern Australia.

[[File:Lunar eclipse from moon-1971Aug06.png	300px]] [[File:Lunar eclipse chart close-1971Aug06.png	300px]]

Eclipse details

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

Parameter	Value
Penumbral Magnitude	2.69580
Umbral Magnitude	1.72830
Gamma	−0.07944
Sun Right Ascension	09h04m36.6s
Sun Declination	+16°43'16.0"
Sun Semi-Diameter	15'46.2"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	21h04m44.2s
Moon Declination	-16°47'39.7"
Moon Semi-Diameter	16'17.9"
Moon Equatorial Horizontal Parallax	0°59'49.1"
ΔT	41.8 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.

July 22
Descending node (new moon)
August 6
Ascending node (full moon)
August 20
Descending node (new moon)

[[File:SE1971Jul22P.png	200px]]	[[File:Lunar eclipse chart close-1971Aug06.png	200px]]	[[File:SE1971Aug20P.png	200px]]
Partial solar eclipse
Solar Saros 116	Total lunar eclipse
Lunar Saros 128	Partial solar eclipse
Solar Saros 154

Related eclipses

Eclipses in 1971

A total lunar eclipse on February 10.
A partial solar eclipse on February 25.
A partial solar eclipse on July 22.
A total lunar eclipse on August 6.
A partial solar eclipse on August 20.

Metonic

Preceded by: Lunar eclipse of October 18, 1967
Followed by: Lunar eclipse of May 25, 1975

Tzolkinex

Preceded by: Lunar eclipse of June 25, 1964
Followed by: Lunar eclipse of September 16, 1978

Half-Saros

Preceded by: Solar eclipse of July 31, 1962
Followed by: Solar eclipse of August 10, 1980

Tritos

Preceded by: Lunar eclipse of September 5, 1960
Followed by: Lunar eclipse of July 6, 1982

Lunar Saros 128

Preceded by: Lunar eclipse of July 26, 1953
Followed by: Lunar eclipse of August 17, 1989

Inex

Preceded by: Lunar eclipse of August 26, 1942
Followed by: Lunar eclipse of July 16, 2000

Triad

Preceded by: Lunar eclipse of October 4, 1884
Followed by: Lunar eclipse of June 6, 2058

Lunar eclipses of 1969–1973

Saros 128

Tritos series

Inex series

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two annular solar eclipses of Solar Saros 135.

July 31, 1962	August 10, 1980
[[File:SE1962Jul31A.png	240px]]	[[File:SE1980Aug10A.png	240px]]

Notes

References

"August 6–7, 1971 Total Lunar Eclipse (Blood Moon)". timeanddate.
"Moon Distances for London, United Kingdom, England". timeanddate.
"Total Lunar Eclipse of 1971 Aug 06". NASA.
"Total Lunar Eclipse of 1971 Aug 06". EclipseWise.com.
Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros''

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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