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August 2017 lunar eclipse
Partial lunar eclipse of August 7, 2017 From Wikipedia, the free encyclopedia
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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]
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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]
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Gallery
Reggio Calabria, Italy, 17:36 UTC
Lysychansk, Ukraine, 17:54 UTC
Florence, Italy, 17:55 UTC
Lucerne, Switzerland, 18:16 UTC
Pune, India
At maximum, 18:20 UTC
Seoul, South Korea, 18:22 UTC
Omsk, Russia, 18:28 UTC
Constanța, Romania, 18:43 UTC
Gdańsk, Poland, 18:50 UTC
Farasan Island, Saudi Arabia, 18:53 UTC
Karviná, Czech Republic, 18:56 UTC
Helsinki, Finland, 18:57 UTC
Sayada, Tunisia, 19:01 UTC
Gaborone, Botswana, 19:02 UTC
Albershausen, Germany, 19:14 UTC
Rethymno, Greece, 19:21 UTC
Progression from Oria, Italy
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Eclipse details
Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.[4]
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.
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Related eclipses
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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
This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[5]
The penumbral lunar eclipses on March 23, 2016 and September 16, 2016 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on June 5, 2020 and November 30, 2020 occur in the next lunar year eclipse set.
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Saros 119
This eclipse is a part of Saros series 119, repeating every 18 years, 11 days, and containing 82 events. The series started with a penumbral lunar eclipse on October 14, 935 AD. It contains partial eclipses from May 18, 1296 through August 2, 1422; total eclipses from August 13, 1440 through June 15, 1927; and a second set of partial eclipses from June 25, 1945 through August 19, 2035. The series ends at member 82 as a penumbral eclipse on March 25, 2396.
The longest duration of totality was produced by member 49 at 102 minutes, 6 seconds on March 30, 1801. All eclipses in this series occur at the Moon’s descending node of orbit.[6]
Eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
Tritos series
This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.
Inex series
This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two total solar eclipses of Solar Saros 126.
| August 1, 2008 | August 12, 2026 |
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See also
References
External links
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