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Wikipedia / August 2017 lunar eclipse

A partial lunar eclipse occurred at the Moon’s descending node of orbit on Monday, August 7, 2017, with an umbral magnitude of 0.2477. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 5.2 days after apogee (on August 2, 2017, at 13:55 UTC), the Moon's apparent diameter was smaller.

Visibility

The eclipse was completely visible over east Africa, Asia, and Australia, seen rising over much of Africa and Europe and setting over the central Pacific Ocean.

Hourly motion shown right to left

Visibility map

Gallery

Eclipse details

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

Parameter

Value

Penumbral Magnitude

1.28985

Umbral Magnitude

0.24767

Gamma

0.86690

Sun Right Ascension

09h11m33.0s

Sun Declination

+16°12'28.1"

Sun Semi-Diameter

15'46.4"

Sun Equatorial Horizontal Parallax

08.7"

Moon Right Ascension

21h10m53.1s

Moon Declination

-15°25'17.2"

Moon Semi-Diameter

15'08.1"

Moon Equatorial Horizontal Parallax

0°55'32.7"

ΔT

68.5 s

August 7, 2017 Lunar Eclipse Parameters

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.

August 7Descending node (full moon)

August 21Ascending node (new moon)

Partial lunar eclipseLunar Saros 119

Total solar eclipseSolar Saros 145

Eclipse season of August 2017

Related eclipses

Eclipses in 2017

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 119

Inex

Triad

Lunar eclipses of 2016–2020

Saros 119

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 total solar eclipses of Solar Saros 126.

August 1, 2008

August 12, 2026

See also

References