| Partial eclipse | |
 Map | |
| Gamma | 1.0215 |
|---|---|
| Magnitude | 0.9793 |
| Maximum eclipse | |
| Coordinates | 71°42′N82°18′W / 71.7°N 82.3°W /71.7; -82.3 |
| Times (UTC) | |
| Greatest eclipse | 1:09:34 |
| References | |
| Saros | 155 (8 of 71) |
| Catalog # (SE5000) | 9628 |
A partialsolar eclipse will occur at the Moon'sascending node of orbit between Tuesday, September 1 and Wednesday, September 2, 2054,[1] with amagnitude of 0.9793. Asolar eclipse occurs when theMoon passes betweenEarth and theSun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.
The partial solar eclipse will be visible for parts ofNortheast Asia,Alaska, westernCanada, and the westernUnited States. This is the last of the first set of partial eclipses inSolar Saros 155.
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.[2]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 2054 September 01 at 23:12:21.2 UTC |
| Equatorial Conjunction | 2054 September 02 at 00:38:15.2 UTC |
| Greatest Eclipse | 2054 September 02 at 01:09:33.7 UTC |
| Ecliptic Conjunction | 2054 September 02 at 01:19:46.2 UTC |
| Last Penumbral External Contact | 2054 September 02 at 03:07:02.1 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.97932 |
| Eclipse Obscuration | 0.98275 |
| Gamma | 1.02148 |
| Sun Right Ascension | 10h45m28.2s |
| Sun Declination | +07°52'58.6" |
| Sun Semi-Diameter | 15'50.9" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 10h46m40.4s |
| Moon Declination | +08°52'49.8" |
| Moon Semi-Diameter | 16'42.0" |
| Moon Equatorial Horizontal Parallax | 1°01'17.5" |
| ΔT | 86.9 s |
This eclipse is part of aneclipse 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 afortnight. The first and last eclipse in this sequence is separated by onesynodic month.
| 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 |
This eclipse is a member of asemester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternatingnodes of the Moon's orbit.[3]
The partial solar eclipse onAugust 3, 2054 occurs in the next lunar year eclipse set.
| Solar eclipse series sets from 2051 to 2054 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 120 | April 11, 2051 Partial | 1.0169 | 125 | October 4, 2051 Partial | −1.2094 | |
| 130 | March 30, 2052 Total | 0.3238 | 135 | September 22, 2052 Annular | −0.448 | |
| 140 | March 20, 2053 Annular | −0.4089 | 145 | September 12, 2053 Total | 0.314 | |
| 150 | March 9, 2054 Partial | −1.1711 | 155 | September 2, 2054 Partial | 1.0215 | |
This eclipse is a part ofSaros series 155, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse onJune 17, 1928. It contains total eclipses fromSeptember 12, 2072 through August 30, 2649; hybrid eclipses from September 10, 2667 through October 2, 2703; and annular eclipses from October 13, 2721 through May 8, 3064. The series ends at member 71 as a partial eclipse on July 24, 3190. Its eclipses are tabulated in three columns; every third eclipse in the same column is oneexeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
The longest duration of totality will be produced by member 14 at 4 minutes, 5 seconds on November 6, 2162, and the longest duration of annularity will be produced by member 63 at 5 minutes, 31 seconds on April 28, 3046. All eclipses in this series occur at the Moon’sascending node of orbit.[4]
| Series members 1–16 occur between 1928 and 2200: | ||
|---|---|---|
| 1 | 2 | 3 |
 June 17, 1928 |  June 29, 1946 |  July 9, 1964 |
| 4 | 5 | 6 |
 July 20, 1982 |  July 31, 2000 |  August 11, 2018 |
| 7 | 8 | 9 |
 August 21, 2036 | September 2, 2054 |  September 12, 2072 |
| 10 | 11 | 12 |
 September 23, 2090 |  October 5, 2108 |  October 16, 2126 |
| 13 | 14 | 15 |
 October 26, 2144 |  November 7, 2162 |  November 17, 2180 |
| 16 | ||
 November 28, 2198 | ||
Themetonic 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.
| 21 eclipse events between June 21, 1982 and June 21, 2058 | ||||
|---|---|---|---|---|
| June 21 | April 8–9 | January 26 | November 13–14 | September 1–2 |
| 117 | 119 | 121 | 123 | 125 |
 June 21, 1982 |  April 9, 1986 |  January 26, 1990 |  November 13, 1993 |  September 2, 1997 |
| 127 | 129 | 131 | 133 | 135 |
 June 21, 2001 |  April 8, 2005 |  January 26, 2009 |  November 13, 2012 |  September 1, 2016 |
| 137 | 139 | 141 | 143 | 145 |
 June 21, 2020 |  April 8, 2024 |  January 26, 2028 |  November 14, 2031 |  September 2, 2035 |
| 147 | 149 | 151 | 153 | 155 |
 June 21, 2039 |  April 9, 2043 |  January 26, 2047 |  November 14, 2050 | September 2, 2054 |
| 157 | ||||
 June 21, 2058 | ||||
This eclipse is a part of atritos cycle, repeating at alternating nodes every 135synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic 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 2087 | ||||
|---|---|---|---|---|
 August 17, 1803 (Saros 132) |  July 17, 1814 (Saros 133) |  June 16, 1825 (Saros 134) |  May 15, 1836 (Saros 135) |  April 15, 1847 (Saros 136) |
 March 15, 1858 (Saros 137) |  February 11, 1869 (Saros 138) |  January 11, 1880 (Saros 139) |  December 12, 1890 (Saros 140) |  November 11, 1901 (Saros 141) |
 October 10, 1912 (Saros 142) |  September 10, 1923 (Saros 143) |  August 10, 1934 (Saros 144) |  July 9, 1945 (Saros 145) |  June 8, 1956 (Saros 146) |
 May 9, 1967 (Saros 147) |  April 7, 1978 (Saros 148) |  March 7, 1989 (Saros 149) |  February 5, 2000 (Saros 150) |  January 4, 2011 (Saros 151) |
 December 4, 2021 (Saros 152) |  November 3, 2032 (Saros 153) |  October 3, 2043 (Saros 154) | September 2, 2054 (Saros 155) |  August 2, 2065 (Saros 156) |
 July 1, 2076 (Saros 157) |  June 1, 2087 (Saros 158) | |||
This eclipse is a part of the long periodinex cycle, repeating at alternating nodes, every 358synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic 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 | ||
|---|---|---|
 February 11, 1823 (Saros 147) |  January 21, 1852 (Saros 148) |  December 31, 1880 (Saros 149) |
 December 12, 1909 (Saros 150) |  November 21, 1938 (Saros 151) |  November 2, 1967 (Saros 152) |
 October 12, 1996 (Saros 153) |  September 21, 2025 (Saros 154) | September 2, 2054 (Saros 155) |
 August 13, 2083 (Saros 156) |  July 23, 2112 (Saros 157) |  July 3, 2141 (Saros 158) |
 June 14, 2170 (Saros 159) |  May 24, 2199 (Saros 160) | |
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