| Total eclipse | |
 Map | |
| Gamma | −0.8763 |
|---|---|
| Magnitude | 1.0294 |
| Maximum eclipse | |
| Duration | 149 s (2 min 29 s) |
| Coordinates | 43°12′S89°24′W / 43.2°S 89.4°W /-43.2; -89.4 |
| Max. width of band | 206 km (128 mi) |
| Times (UTC) | |
| Greatest eclipse | 17:15:23 |
| References | |
| Saros | 127 (61 of 82) |
| Catalog # (SE5000) | 9672 |
A totalsolar eclipse will occur at the Moon'sascending node of orbit on Thursday, August 3, 2073,[1] with amagnitude of 1.0294. 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 total solar eclipse occurs when the Moon'sapparent 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 3.1 days beforeperigee (on August 6, 2073, at 18:30 UTC), the Moon's apparent diameter will be larger.[2]
The path of totality will be visible from parts of southernChile andArgentina. A partial solar eclipse will also be visible for parts of central and southernSouth America and theAntarctic Peninsula.
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.[3]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 2073 August 3 at 14:59:49.8 UTC |
| First Umbral External Contact | 2073 August 3 at 16:23:00.4 UTC |
| First Central Line | 2073 August 3 at 16:24:14.0 UTC |
| First Umbral Internal Contact | 2073 August 3 at 16:25:29.0 UTC |
| Ecliptic Conjunction | 2073 August 3 at 17:06:09.1 UTC |
| Greatest Eclipse | 2073 August 3 at 17:15:22.9 UTC |
| Greatest Duration | 2073 August 3 at 17:15:47.5 UTC |
| Equatorial Conjunction | 2073 August 3 at 17:32:50.7 UTC |
| Last Umbral Internal Contact | 2073 August 3 at 18:05:01.7 UTC |
| Last Central Line | 2073 August 3 at 18:06:19.2 UTC |
| Last Umbral External Contact | 2073 August 3 at 18:07:35.3 UTC |
| Last Penumbral External Contact | 2073 August 3 at 19:30:43.1 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 1.02936 |
| Eclipse Obscuration | 1.05957 |
| Gamma | −0.87626 |
| Sun Right Ascension | 08h57m50.6s |
| Sun Declination | +17°11'06.4" |
| Sun Semi-Diameter | 15'45.7" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 08h57m11.2s |
| Moon Declination | +16°20'19.0" |
| Moon Semi-Diameter | 16'06.2" |
| Moon Equatorial Horizontal Parallax | 0°59'05.8" |
| ΔT | 100.3 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.
| August 3 Ascending node (new moon) | August 17 Descending node (full moon) |
|---|---|
| |
| Total solar eclipse Solar Saros 127 | Total lunar eclipse Lunar Saros 139 |
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.[4]
The partial solar eclipses onJune 1, 2076 andNovember 26, 2076 occur in the next lunar year eclipse set.
| Solar eclipse series sets from 2073 to 2076 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 122 | February 7, 2073 Partial | 1.1651 | 127 | August 3, 2073 Total | −0.8763 | |
| 132 | January 27, 2074 Annular | 0.4251 | 137 | July 24, 2074 Annular | −0.1242 | |
| 142 | January 16, 2075 Total | −0.2799 | 147 | July 13, 2075 Annular | 0.6583 | |
| 152 | January 6, 2076 Total | −0.9373 | 157 | July 1, 2076 Partial | 1.4005 | |
This eclipse is a part ofSaros 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 throughAugust 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 oneexeligmos 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’sascending node of orbit.[5]
| 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 | |
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.
| 23 eclipse events between August 3, 2054 and October 16, 2145 | ||||
|---|---|---|---|---|
| August 3–4 | May 22–24 | March 10–11 | December 27–29 | October 14–16 |
| 117 | 119 | 121 | 123 | 125 |
 August 3, 2054 |  May 22, 2058 |  March 11, 2062 |  December 27, 2065 |  October 15, 2069 |
| 127 | 129 | 131 | 133 | 135 |
August 3, 2073 |  May 22, 2077 |  March 10, 2081 |  December 27, 2084 |  October 14, 2088 |
| 137 | 139 | 141 | 143 | 145 |
 August 3, 2092 |  May 22, 2096 |  March 10, 2100 |  December 29, 2103 |  October 16, 2107 |
| 147 | 149 | 151 | 153 | 155 |
 August 4, 2111 |  May 24, 2115 |  March 11, 2119 |  December 28, 2122 |  October 16, 2126 |
| 157 | 159 | 161 | 163 | 165 |
 August 4, 2130 |  May 23, 2134 |  October 16, 2145 | ||
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 1866 and 2200 | ||||
|---|---|---|---|---|
 March 16, 1866 (Saros 108) |  December 13, 1898 (Saros 111) | |||
 September 12, 1931 (Saros 114) |  August 12, 1942 (Saros 115) |  July 11, 1953 (Saros 116) |  June 10, 1964 (Saros 117) | |
 May 11, 1975 (Saros 118) |  April 9, 1986 (Saros 119) |  March 9, 1997 (Saros 120) |  February 7, 2008 (Saros 121) |  January 6, 2019 (Saros 122) |
 December 5, 2029 (Saros 123) |  November 4, 2040 (Saros 124) |  October 4, 2051 (Saros 125) |  September 3, 2062 (Saros 126) | August 3, 2073 (Saros 127) |
 July 3, 2084 (Saros 128) |  June 2, 2095 (Saros 129) |  May 3, 2106 (Saros 130) |  April 2, 2117 (Saros 131) |  March 1, 2128 (Saros 132) |
 January 30, 2139 (Saros 133) |  December 30, 2149 (Saros 134) |  November 27, 2160 (Saros 135) |  October 29, 2171 (Saros 136) |  September 27, 2182 (Saros 137) |
 August 26, 2193 (Saros 138) | ||||
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 1, 1813 (Saros 118) |  January 11, 1842 (Saros 119) |  December 22, 1870 (Saros 120) |
 December 3, 1899 (Saros 121) |  November 12, 1928 (Saros 122) |  October 23, 1957 (Saros 123) |
 October 3, 1986 (Saros 124) |  September 13, 2015 (Saros 125) |  August 23, 2044 (Saros 126) |
August 3, 2073 (Saros 127) |  July 15, 2102 (Saros 128) |  June 25, 2131 (Saros 129) |
 June 4, 2160 (Saros 130) |  May 15, 2189 (Saros 131) | |
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