August 2017 lunar eclipse

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Template:Short description Template:Infobox lunar eclipse A partial lunar eclipse occurred at the Moon’s descending node of orbit on Monday, August 7, 2017,[1] 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.[2]

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.[3]

File:Lunar eclipse from moon-2017Aug07.png File:Lunar eclipse chart close-2017Aug07.png
Hourly motion shown right to left
File:Visibility Lunar Eclipse 2017-08-07.png
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.[4]

August 7, 2017 Lunar Eclipse Parameters
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

Eclipse season

Script error: No such module "Labelled list hatnote". 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.

Eclipse season of August 2017
August 7
Descending node (full moon)
August 21
Ascending node (new moon)
File:Lunar eclipse chart close-2017Aug07.png File:SE2017Aug21T.png
Partial lunar eclipse
Lunar Saros 119
Total solar eclipse
Solar Saros 145

Related eclipses

Eclipses in 2017

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 119

Inex

Triad

Lunar eclipses of 2016–2020

Template:Lunar eclipse set 2016-2020

Saros 119

Template:Lunar Saros series 119

Tritos series

Template:Lunar Tritos series September 2006

Inex series

Template:Lunar Inex series August 2017

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[5] This lunar eclipse is related to two total solar eclipses of Solar Saros 126.

August 1, 2008 August 12, 2026
File:SE2008Aug01T.png File:SE2026Aug12T.png

See also

References

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  5. Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

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External links

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Template:Lunar eclipses