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August 2027 lunar eclipse
Penumbral From Wikipedia, the free encyclopedia
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A penumbral lunar eclipse will occur at the Moon’s ascending node of orbit on Tuesday, August 17, 2027,[1] with an umbral magnitude of −0.5234. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 1.9 days after apogee (on August 15, 2027, at 10:20 UTC), the Moon's apparent diameter will be smaller.[2]
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Visibility
The eclipse will be completely visible over North and South America, seen rising over Australia and the central Pacific Ocean and setting over west Africa.[3]
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Eclipse details
Shown below is a table displaying details about this particular eclipse. It describes various parameters pertaining to this eclipse.[4]
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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. The first and last eclipse in this sequence is separated by one synodic month.
Related eclipses
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Eclipses in 2027
- An annular solar eclipse on February 6.
- A penumbral lunar eclipse on February 20.
- A penumbral lunar eclipse on July 18.
- A total solar eclipse on August 2.
- A penumbral lunar eclipse on August 17.
Metonic
- Preceded by: Lunar eclipse of October 28, 2023
- Followed by: Lunar eclipse of June 5, 2031
Tzolkinex
- Preceded by: Lunar eclipse of July 5, 2020
- Followed by: Lunar eclipse of September 28, 2034
Half-Saros
- Preceded by: Solar eclipse of August 11, 2018
- Followed by: Solar eclipse of August 21, 2036
Tritos
- Preceded by: Lunar eclipse of September 16, 2016
- Followed by: Lunar eclipse of July 16, 2038
Lunar Saros 148
- Preceded by: Lunar eclipse of August 6, 2009
- Followed by: Lunar eclipse of August 27, 2045
Inex
- Preceded by: Lunar eclipse of September 6, 1998
- Followed by: Lunar eclipse of July 26, 2056
Triad
- Preceded by: Lunar eclipse of October 16, 1940
- Followed by: Lunar eclipse of June 18, 2114
Lunar eclipses of 2024–2027
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 eclipse on July 18, 2027 occurs in the next lunar year eclipse set.
Metonic series
The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.
Saros 148
This eclipse is a part of Saros series 148, repeating every 18 years, 11 days, and containing 70 events. The series started with a penumbral lunar eclipse on July 15, 1973. It contains partial eclipses from October 10, 2117 through May 5, 2460; total eclipses from May 17, 2478 through September 14, 2676; and a second set of partial eclipses from September 25, 2694 through May 25, 3091. The series ends at member 70 as a penumbral eclipse on August 9, 3217.
The longest duration of totality will be produced by member 37 at 104 minutes, 29 seconds on July 10, 2568. All eclipses in this series occur at the Moon’s ascending 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 partial solar eclipses of Solar Saros 155.
| August 11, 2018 | August 21, 2036 |
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