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.
+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
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 7Descending node (full moon) August 21Ascending node (new moon) Partial lunar eclipseLunar Saros 119 Total solar eclipseSolar Saros 145
Related eclipses Eclipses in 2017 A penumbral lunar eclipse on February 11. An annular solar eclipse on February 26. A partial lunar eclipse on August 7. A total solar eclipse on August 21.
Metonic Preceded by: Lunar eclipse of October 18, 2013 Followed by: Lunar eclipse of May 26, 2021
Tzolkinex Preceded by: Lunar eclipse of June 26, 2010 Followed by: Lunar eclipse of September 18, 2024
Half-Saros Preceded by: Solar eclipse of August 1, 2008 Followed by: Solar eclipse of August 12, 2026
Tritos Preceded by: Lunar eclipse of September 7, 2006 Followed by: Lunar eclipse of July 6, 2028
Lunar Saros 119 Preceded by: Lunar eclipse of July 28, 1999 Followed by: Lunar eclipse of August 19, 2035
Inex Preceded by: Lunar eclipse of August 27, 1988 Followed by: Lunar eclipse of July 18, 2046
Triad Preceded by: Lunar eclipse of October 7, 1930 Followed by: Lunar eclipse of June 8, 2104
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).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros This lunar eclipse is related to two total solar eclipses of Solar Saros 126. August 1, 2008August 12, 2026
See also List of 21st-century lunar eclipses Lists of lunar eclipses
References
External links
Hermit Eclipse: Partial Lunar Eclipse of 7 Aug, 2017 AD Partial Lunar Eclipse 7 Aug, 2017 - Live Webcast August's Lunar Eclipse APOD: Aug 9, 2017