# August 2054 lunar eclipse

A total lunar eclipse will occur at the Moon’s descending node of orbit on Tuesday, August 18, 2054, with an umbral magnitude of 1.3074. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring only about 2 hours after apogee (on August 18, 2054, at 6:20 UTC), the Moon's apparent diameter will be smaller.
This lunar eclipse will be the second of an almost tetrad, with the others being on February 22, 2054 (total); February 11, 2055 (total); and August 7, 2055 (partial).

## Visibility

The eclipse will be completely visible over western North America and the central and eastern Pacific Ocean, seen rising over east Asia and Australia and setting over eastern North America and South America.

## Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
August 18, 2054 Lunar Eclipse Parameters :
| Parameter | Value |
| Penumbral Magnitude | 2.38166 |
| Umbral Magnitude | 1.30735 |
| Gamma | 0.28065 |
| Sun Right Ascension | 09h51m47.0s |
| Sun Declination | +12°57'08.8" |
| Sun Semi-Diameter | 15'48.0" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 21h51m32.0s |
| Moon Declination | -12°42'26.7" |
| Moon Semi-Diameter | 14'42.4" |
| Moon Equatorial Horizontal Parallax | 0°53'58.4" |
| ΔT | 88.1 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. The first and last eclipse in this sequence is separated by one synodic month.
Eclipse season of August–September 2054 :
| August 3 Ascending node (new moon) | August 18 Descending node (full moon) | September 2 Ascending node (new moon) |
| Partial solar eclipse Solar Saros 117 | Total lunar eclipse Lunar Saros 129 | Partial solar eclipse Solar Saros 155 |

## Related eclipses
### Eclipses in 2054

* A total lunar eclipse on February 22.
* A partial solar eclipse on March 9.
* A partial solar eclipse on August 3.
* A total lunar eclipse on August 18.
* A partial solar eclipse on September 2.

### Metonic

* Preceded by: Lunar eclipse of October 30, 2050
* Followed by: Lunar eclipse of June 6, 2058

### Tzolkinex

* Preceded by: Lunar eclipse of July 7, 2047
* Followed by: Lunar eclipse of September 29, 2061

### Half-Saros

* Preceded by: Solar eclipse of August 12, 2045
* Followed by: Solar eclipse of August 24, 2063

### Tritos

* Preceded by: Lunar eclipse of September 19, 2043
* Followed by: Lunar eclipse of July 17, 2065

### Lunar Saros 129

* Preceded by: Lunar eclipse of August 7, 2036
* Followed by: Lunar eclipse of August 28, 2072

### Inex

* Preceded by: Lunar eclipse of September 7, 2025
* Followed by: Lunar eclipse of July 29, 2083

### Triad

* Preceded by: Lunar eclipse of October 18, 1967
* Followed by: Lunar eclipse of June 19, 2141

### Lunar eclipses of 2053–2056

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.
The penumbral lunar eclipses on June 27, 2056 and December 22, 2056 occur in the next lunar year eclipse set.
Lunar eclipse series sets from 2053 to 2056 :
| Ascending node | Ascending node | Ascending node | Ascending node | Descending node | Descending node | Descending node | Descending node |
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | Gamma |
| 114 | 2053 Mar 04 | Penumbral | −1.0530 | 119 | 2053 Aug 29 | Penumbral | 1.0165 |
| 124 | 2054 Feb 22 | Total | −0.3242 | 129 | 2054 Aug 18 | Total | 0.2806 |
| 134 | 2055 Feb 11 | Total | 0.3526 | 139 | 2055 Aug 07 | Partial | −0.4769 |
| 144 | 2056 Feb 01 | Penumbral | 1.0682 | 149 | 2056 Jul 26 | Partial | −1.2048 |

### Saros 129

This eclipse is a part of Saros series 129, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 1351. It contains partial eclipses from September 26, 1531 through May 11, 1892; total eclipses from May 24, 1910 through September 8, 2090; and a second set of partial eclipses from September 20, 2108 through April 26, 2469. The series ends at member 71 as a penumbral eclipse on July 24, 2613.
The longest duration of totality was produced by member 37 at 106 minutes, 24 seconds on July 16, 2000. All eclipses in this series occur at the Moon’s descending node of orbit.
| Greatest | First | First | First | First |
| The greatest eclipse of the series occurred on 2000 Jul 16, lasting 106 minutes, 24 seconds. | Penumbral | Partial | Total | Central |
| The greatest eclipse of the series occurred on 2000 Jul 16, lasting 106 minutes, 24 seconds. | 1351 Jun 10 | 1531 Sep 26 | 1910 May 24 | 1946 Jun 14 |
| Last ||||
| The greatest eclipse of the series occurred on 2000 Jul 16, lasting 106 minutes, 24 seconds. | Central | Total | Partial | Penumbral |
| The greatest eclipse of the series occurred on 2000 Jul 16, lasting 106 minutes, 24 seconds. | 2036 Aug 07 | 2090 Sep 08 | 2469 Apr 26 | 2613 Jul 24 |
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.
Series members 26–48 occur between 1801 and 2200: :
| 26 | 26 | 27 | 27 | 28 | 28 |
| 1802 Mar 19 | 1802 Mar 19 | 1820 Mar 29 | 1820 Mar 29 | 1838 Apr 10 | 1838 Apr 10 |
| 29 | 29 | 30 | 30 | 31 | 31 |
| 1856 Apr 20 | 1856 Apr 20 | 1874 May 01 | 1874 May 01 | 1892 May 11 | 1892 May 11 |
| 32 | 32 | 33 | 33 | 34 | 34 |
| 1910 May 24 | 1910 May 24 | 1928 Jun 03 | 1928 Jun 03 | 1946 Jun 14 | 1946 Jun 14 |
| 35 | 35 | 36 | 36 | 37 | 37 |
| 1964 Jun 25 | 1964 Jun 25 | 1982 Jul 06 | 1982 Jul 06 | 2000 Jul 16 | 2000 Jul 16 |
| 38 | 38 | 39 | 39 | 40 | 40 |
| 2018 Jul 27 | 2018 Jul 27 | 2036 Aug 07 | 2036 Aug 07 | 2054 Aug 18 | 2054 Aug 18 |
| 41 | 41 | 42 | 42 | 43 | 43 |
| 2072 Aug 28 | 2072 Aug 28 | 2090 Sep 08 | 2090 Sep 08 | 2108 Sep 20 | 2108 Sep 20 |
| 44 | 44 | 45 | 45 | 46 | 46 |
| 2126 Oct 01 | 2126 Oct 01 | 2144 Oct 11 | 2144 Oct 11 | 2162 Oct 23 | 2162 Oct 23 |
| 47 | 47 | 48 | 48 |
| 2180 Nov 02 | 2180 Nov 02 | 2198 Nov 13 | 2198 Nov 13 |

### 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.
Series members between 1801 and 2200 :
| 1803 Aug 03 (Saros 106) | 1803 Aug 03 (Saros 106) | 1814 Jul 02 (Saros 107) | 1814 Jul 02 (Saros 107) | 1825 Jun 01 (Saros 108) | 1825 Jun 01 (Saros 108) | 1836 May 01 (Saros 109) | 1836 May 01 (Saros 109) | 1847 Mar 31 (Saros 110) | 1847 Mar 31 (Saros 110) |
| 1858 Feb 27 (Saros 111) | 1858 Feb 27 (Saros 111) | 1869 Jan 28 (Saros 112) | 1869 Jan 28 (Saros 112) | 1879 Dec 28 (Saros 113) | 1879 Dec 28 (Saros 113) | 1890 Nov 26 (Saros 114) | 1890 Nov 26 (Saros 114) | 1901 Oct 27 (Saros 115) | 1901 Oct 27 (Saros 115) |
| 1912 Sep 26 (Saros 116) | 1912 Sep 26 (Saros 116) | 1923 Aug 26 (Saros 117) | 1923 Aug 26 (Saros 117) | 1934 Jul 26 (Saros 118) | 1934 Jul 26 (Saros 118) | 1945 Jun 25 (Saros 119) | 1945 Jun 25 (Saros 119) | 1956 May 24 (Saros 120) | 1956 May 24 (Saros 120) |
| 1967 Apr 24 (Saros 121) | 1967 Apr 24 (Saros 121) | 1978 Mar 24 (Saros 122) | 1978 Mar 24 (Saros 122) | 1989 Feb 20 (Saros 123) | 1989 Feb 20 (Saros 123) | 2000 Jan 21 (Saros 124) | 2000 Jan 21 (Saros 124) | 2010 Dec 21 (Saros 125) | 2010 Dec 21 (Saros 125) |
| 2021 Nov 19 (Saros 126) | 2021 Nov 19 (Saros 126) | 2032 Oct 18 (Saros 127) | 2032 Oct 18 (Saros 127) | 2043 Sep 19 (Saros 128) | 2043 Sep 19 (Saros 128) | 2054 Aug 18 (Saros 129) | 2054 Aug 18 (Saros 129) | 2065 Jul 17 (Saros 130) | 2065 Jul 17 (Saros 130) |
| 2076 Jun 17 (Saros 131) | 2076 Jun 17 (Saros 131) | 2087 May 17 (Saros 132) | 2087 May 17 (Saros 132) | 2098 Apr 15 (Saros 133) | 2098 Apr 15 (Saros 133) | 2109 Mar 17 (Saros 134) | 2109 Mar 17 (Saros 134) | 2120 Feb 14 (Saros 135) | 2120 Feb 14 (Saros 135) |
| 2131 Jan 13 (Saros 136) | 2131 Jan 13 (Saros 136) | 2141 Dec 13 (Saros 137) | 2141 Dec 13 (Saros 137) | 2152 Nov 12 (Saros 138) | 2152 Nov 12 (Saros 138) | 2163 Oct 12 (Saros 139) | 2163 Oct 12 (Saros 139) | 2174 Sep 11 (Saros 140) | 2174 Sep 11 (Saros 140) |
| 2185 Aug 11 (Saros 141) | 2185 Aug 11 (Saros 141) | 2196 Jul 10 (Saros 142) | 2196 Jul 10 (Saros 142) |

### 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.
Series members between 1801 and 2200 :
| 1823 Jan 26 (Saros 121) | 1823 Jan 26 (Saros 121) | 1852 Jan 07 (Saros 122) | 1852 Jan 07 (Saros 122) | 1880 Dec 16 (Saros 123) | 1880 Dec 16 (Saros 123) |
| 1909 Nov 27 (Saros 124) | 1909 Nov 27 (Saros 124) | 1938 Nov 07 (Saros 125) | 1938 Nov 07 (Saros 125) | 1967 Oct 18 (Saros 126) | 1967 Oct 18 (Saros 126) |
| 1996 Sep 27 (Saros 127) | 1996 Sep 27 (Saros 127) | 2025 Sep 07 (Saros 128) | 2025 Sep 07 (Saros 128) | 2054 Aug 18 (Saros 129) | 2054 Aug 18 (Saros 129) |
| 2083 Jul 29 (Saros 130) | 2083 Jul 29 (Saros 130) | 2112 Jul 09 (Saros 131) | 2112 Jul 09 (Saros 131) | 2141 Jun 19 (Saros 132) | 2141 Jun 19 (Saros 132) |
| 2170 May 30 (Saros 133) | 2170 May 30 (Saros 133) | 2199 May 10 (Saros 134) | 2199 May 10 (Saros 134) |

### Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two total solar eclipses of Solar Saros 136.
| August 12, 2045 | August 24, 2063 |