# Solar eclipse of August 15, 2091

A total solar eclipse will occur at the Moon's ascending node of orbit between Tuesday, August 14 and Wednesday, August 15, 2091, with a magnitude of 1.0216. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 3.3 days before perigee (on August 18, 2091, at 7:15 UTC), the Moon's apparent diameter will be larger.
While the path of totality will not be visible from any landmasses, a partial solar eclipse will be visible for parts of Australia, Oceania, and Antarctica. This will be the last of 42 umbral eclipses of Solar Saros 127.

## Eclipse details

Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.
August 15, 2091 Solar Eclipse Times :
| Event | Time (UTC) |
| First Penumbral External Contact | 2091 August 14 at 22:24:15.1 UTC |
| First Umbral External Contact | 2091 August 15 at 00:00:09.8 UTC |
| First Central Line | 2091 August 15 at 00:01:38.3 UTC |
| First Umbral Internal Contact | 2091 August 15 at 00:03:10.7 UTC |
| Ecliptic Conjunction | 2091 August 15 at 00:24:41.8 UTC |
| Greatest Eclipse | 2091 August 15 at 00:34:42.9 UTC |
| Greatest Duration | 2091 August 15 at 00:35:13.8 UTC |
| Equatorial Conjunction | 2091 August 15 at 00:58:54.8 UTC |
| Last Umbral Internal Contact | 2091 August 15 at 01:05:55.1 UTC |
| Last Central Line | 2091 August 15 at 01:07:30.0 UTC |
| Last Umbral External Contact | 2091 August 15 at 01:09:01.1 UTC |
| Last Penumbral External Contact | 2091 August 15 at 02:44:54.6 UTC |
August 15, 2091 Solar Eclipse Parameters :
| Parameter | Value |
| Eclipse Magnitude | 1.02156 |
| Eclipse Obscuration | 1.04358 |
| Gamma | −0.94897 |
| Sun Right Ascension | 09h39m24.9s |
| Sun Declination | +14°00'16.0" |
| Sun Semi-Diameter | 15'47.2" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 09h38m32.0s |
| Moon Declination | +13°05'59.9" |
| Moon Semi-Diameter | 16'03.2" |
| Moon Equatorial Horizontal Parallax | 0°58'54.9" |
| ΔT | 115.6 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 2091 :
| August 15 Ascending node (new moon) | August 29 Descending node (full moon) |
| Total solar eclipse Solar Saros 127 | Total lunar eclipse Lunar Saros 139 |

## Related eclipses
### Eclipses in 2091

* A partial solar eclipse on February 18.
* A total lunar eclipse on March 5.
* A total solar eclipse on August 15.
* A total lunar eclipse on August 29.

### Metonic

* Preceded by: Solar eclipse of October 26, 2087
* Followed by: Solar eclipse of June 2, 2095

### Tzolkinex

* Preceded by: Solar eclipse of July 3, 2084
* Followed by: Solar eclipse of September 25, 2098

### Half-Saros

* Preceded by: Lunar eclipse of August 8, 2082
* Followed by: Lunar eclipse of August 19, 2100

### Tritos

* Preceded by: Solar eclipse of September 13, 2080
* Followed by: Solar eclipse of July 15, 2102

### Solar Saros 127

* Preceded by: Solar eclipse of August 3, 2073
* Followed by: Solar eclipse of August 26, 2109

### Inex

* Preceded by: Solar eclipse of September 3, 2062
* Followed by: Solar eclipse of July 25, 2120

### Triad

* Preceded by: Solar eclipse of October 14, 2004
* Followed by: Solar eclipse of June 16, 2178

### Solar eclipses of 2091–2094

This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.
The partial solar eclipses on June 13, 2094 and December 7, 2094 occur in the next lunar year eclipse set.
Solar eclipse series sets from 2091 to 2094 :
| Descending node | Descending node | Descending node | Ascending node | Ascending node | Ascending node |
| Saros | Map | Gamma | Saros | Map | Gamma |
| 122 | February 18, 2091 Partial | 1.1779 | 127 | August 15, 2091 Total | −0.949 |
| 132 | February 7, 2092 Annular | 0.4322 | 137 | August 3, 2092 Annular | −0.2044 |
| 142 | January 27, 2093 Total | −0.2737 | 147 | July 23, 2093 Annular | 0.5717 |
| 152 | January 16, 2094 Total | −0.9333 | 157 | July 12, 2094 Partial | 1.3150 |

### Saros 127

This eclipse is a part of Saros series 127, repeating every 18 years, 11 days, and containing 82 events. The series started with a partial solar eclipse on October 10, 991 AD. It contains total eclipses from May 14, 1352 through August 15, 2091. There are no annular or hybrid eclipses in this set. The series ends at member 82 as a partial eclipse on March 21, 2452. Its 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.
The longest duration of totality was produced by member 31 at 5 minutes, 40 seconds on August 30, 1532. All eclipses in this series occur at the Moon’s ascending node of orbit.
Series members 46–68 occur between 1801 and 2200: :
| 46 | 47 | 48 |
| February 21, 1803 | March 4, 1821 | March 15, 1839 |
| 49 | 50 | 51 |
| March 25, 1857 | April 6, 1875 | April 16, 1893 |
| 52 | 53 | 54 |
| April 28, 1911 | May 9, 1929 | May 20, 1947 |
| 55 | 56 | 57 |
| May 30, 1965 | June 11, 1983 | June 21, 2001 |
| 58 | 59 | 60 |
| July 2, 2019 | July 13, 2037 | July 24, 2055 |
| 61 | 62 | 63 |
| August 3, 2073 | August 15, 2091 | August 26, 2109 |
| 64 | 65 | 66 |
| September 6, 2127 | September 16, 2145 | September 28, 2163 |
| 67 | 68 |
| October 8, 2181 | October 19, 2199 |

### Metonic series

The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's ascending node.
22 eclipse events between June 1, 2076 and October 27, 2163 :
| June 1–3 | March 21–22 | January 7–8 | October 26–27 | August 14–15 |
| 119 | 121 | 123 | 125 | 127 |
| June 1, 2076 | March 21, 2080 | January 7, 2084 | October 26, 2087 | August 15, 2091 |
| 129 | 131 | 133 | 135 | 137 |
| June 2, 2095 | March 21, 2099 | January 8, 2103 | October 26, 2106 | August 15, 2110 |
| 139 | 141 | 143 | 145 | 147 |
| June 3, 2114 | March 22, 2118 | January 8, 2122 | October 26, 2125 | August 15, 2129 |
| 149 | 151 | 153 | 155 | 157 |
| June 3, 2133 | March 21, 2137 | January 8, 2141 | October 26, 2144 | August 14, 2148 |
| 159 | 161 | 163 | 165 |
| June 3, 2152 | | | October 27, 2163 |

### 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.
The partial solar eclipses on March 27, 1884 (part of Saros 108) and December 24, 1916 (part of Saros 111) are also a part of this series but are not included in the table below.
Series members between 1971 and 2200 :
| July 22, 1971 (Saros 116) | June 21, 1982 (Saros 117) | May 21, 1993 (Saros 118) | April 19, 2004 (Saros 119) | March 20, 2015 (Saros 120) |
| February 17, 2026 (Saros 121) | January 16, 2037 (Saros 122) | December 16, 2047 (Saros 123) | November 16, 2058 (Saros 124) | October 15, 2069 (Saros 125) |
| September 13, 2080 (Saros 126) | August 15, 2091 (Saros 127) | July 15, 2102 (Saros 128) | June 13, 2113 (Saros 129) | May 14, 2124 (Saros 130) |
| April 13, 2135 (Saros 131) | March 12, 2146 (Saros 132) | February 9, 2157 (Saros 133) | January 10, 2168 (Saros 134) | December 9, 2178 (Saros 135) |
| November 8, 2189 (Saros 136) | October 9, 2200 (Saros 137) |

### 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 :
| March 4, 1802 (Saros 117) | February 12, 1831 (Saros 118) | January 23, 1860 (Saros 119) |
| January 1, 1889 (Saros 120) | December 14, 1917 (Saros 121) | November 23, 1946 (Saros 122) |
| November 3, 1975 (Saros 123) | October 14, 2004 (Saros 124) | September 23, 2033 (Saros 125) |
| September 3, 2062 (Saros 126) | August 15, 2091 (Saros 127) | July 25, 2120 (Saros 128) |
| July 5, 2149 (Saros 129) | June 16, 2178 (Saros 130) | |