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, 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.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 |
Eclipse season
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months 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 7 Descending node | August 21 Ascending node |
| Partial lunar eclipse Lunar Saros 119 | Total solar eclipse Solar 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. This lunar eclipse is related to two total solar eclipses of Solar Saros 126.| August 1, 2008 | August 12, 2026 |