| Annular eclipse | |
 Map | |
| Gamma | −0.8041 |
|---|---|
| Magnitude | 0.9409 |
| Maximum eclipse | |
| Duration | 419 s (6 min 59 s) |
| Coordinates | 34°48′S108°36′E / 34.8°S 108.6°E /-34.8; 108.6 |
| Max. width of band | 367 km (228 mi) |
| Times (UTC) | |
| Greatest eclipse | 4:16:13 |
| References | |
| Saros | 125 (50 of 73) |
| Catalog # (SE5000) | 9383 |
An annularsolar eclipse occurred at the Moon'sascending node of orbit on Sunday, August 1, 1943,[1] with amagnitude of 0.9409. Asolar eclipse occurs when theMoon passes betweenEarth and theSun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon'sapparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like anannulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring about 25 minutes beforeapogee (on August 1, 1943, at 4:40 UTC), the Moon's apparent diameter was near its minimum.[2] Apogee did occur as the eclipse was just before its greatest eclipse.
Annularity was visible in the southernIndian Ocean, with the only land beingÎle Amsterdam inFrench Madagascar (now belonging toFrench Southern and Antarctic Lands). A partial solar eclipse was visible fromAustralia,Indonesia,Malaysia, easternMadagascar,Antarctica'sWilkes Land.
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 | 1943 August 1 at 01:36:43.5 UTC |
| First Umbral External Contact | 1943 August 1 at 03:02:00.9 UTC |
| First Central Line | 1943 August 1 at 03:05:56.2 UTC |
| First Umbral Internal Contact | 1943 August 1 at 03:10:00.5 UTC |
| Ecliptic Conjunction | 1943 August 1 at 04:06:41.0 UTC |
| Greatest Duration | 1943 August 1 at 04:13:30.8 UTC |
| Greatest Eclipse | 1943 August 1 at 04:16:13.0 UTC |
| Equatorial Conjunction | 1943 August 1 at 04:31:47.4 UTC |
| Last Umbral Internal Contact | 1943 August 1 at 05:22:14.2 UTC |
| Last Central Line | 1943 August 1 at 05:26:18.8 UTC |
| Last Umbral External Contact | 1943 August 1 at 05:30:14.3 UTC |
| Last Penumbral External Contact | 1943 August 1 at 06:55:35.4 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.94090 |
| Eclipse Obscuration | 0.88530 |
| Gamma | −0.80410 |
| Sun Right Ascension | 08h41m53.3s |
| Sun Declination | +18°15'27.8" |
| Sun Semi-Diameter | 15'45.5" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 08h41m24.1s |
| Moon Declination | +17°32'46.0" |
| Moon Semi-Diameter | 14'41.9" |
| Moon Equatorial Horizontal Parallax | 0°53'56.6" |
| ΔT | 26.0 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 1 Ascending node (new moon) | August 15 Descending node (full moon) |
|---|---|
|  |
| Annular solar eclipse Solar Saros 125 | Partial lunar eclipse Lunar Saros 137 |
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 onMarch 16, 1942 andSeptember 10, 1942 occur in the previous lunar year eclipse set, and the partial solar eclipses onMay 30, 1946 andNovember 23, 1946 occur in the next lunar year eclipse set.
| Solar eclipse series sets from 1942 to 1946 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 115 | August 12, 1942 Partial | −1.5244 | 120 | February 4, 1943 Total | 0.8734 | |
| 125 | August 1, 1943 Annular | −0.8041 | 130 | January 25, 1944 Total | 0.2025 | |
| 135 | July 20, 1944 Annular | −0.0314 | 140 | January 14, 1945 Annular | −0.4937 | |
| 145 | July 9, 1945 Total | 0.7356 | 150 | January 3, 1946 Partial | −1.2392 | |
| 155 | June 29, 1946 Partial | 1.4361 | ||||
This eclipse is a part ofSaros series 125, repeating every 18 years, 11 days, and containing 73 events. The series started with a partial solar eclipse on February 4, 1060. It contains total eclipses from June 13, 1276 through July 16, 1330; hybrid eclipses on July 26, 1348 and August 7, 1366; and annular eclipses from August 17, 1384 throughAugust 22, 1979. The series ends at member 73 as a partial eclipse on April 9, 2358. 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 14 at 1 minutes, 11 seconds on June 25, 1294, and the longest duration of annularity was produced by member 48 at 7 minutes, 23 seconds onJuly 10, 1907. All eclipses in this series occur at the Moon’sascending node of orbit.[5]
| Series members 43–64 occur between 1801 and 2200: | ||
|---|---|---|
| 43 | 44 | 45 |
 May 16, 1817 |  May 27, 1835 |  June 6, 1853 |
| 46 | 47 | 48 |
 June 18, 1871 |  June 28, 1889 |  July 10, 1907 |
| 49 | 50 | 51 |
 July 20, 1925 | August 1, 1943 |  August 11, 1961 |
| 52 | 53 | 54 |
 August 22, 1979 |  September 2, 1997 |  September 13, 2015 |
| 55 | 56 | 57 |
 September 23, 2033 |  October 4, 2051 |  October 15, 2069 |
| 58 | 59 | 60 |
 October 26, 2087 |  November 6, 2105 |  November 18, 2123 |
| 61 | 62 | 63 |
 November 28, 2141 |  December 9, 2159 |  December 20, 2177 |
| 64 | ||
 December 31, 2195 | ||
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.
| 22 eclipse events between December 24, 1916 and July 31, 2000 | ||||
|---|---|---|---|---|
| December 24–25 | October 12 | July 31–August 1 | May 19–20 | March 7 |
| 111 | 113 | 115 | 117 | 119 |
 December 24, 1916 |  July 31, 1924 |  May 19, 1928 |  March 7, 1932 | |
| 121 | 123 | 125 | 127 | 129 |
 December 25, 1935 |  October 12, 1939 | August 1, 1943 |  May 20, 1947 |  March 7, 1951 |
| 131 | 133 | 135 | 137 | 139 |
 December 25, 1954 |  October 12, 1958 |  July 31, 1962 |  May 20, 1966 |  March 7, 1970 |
| 141 | 143 | 145 | 147 | 149 |
 December 24, 1973 |  October 12, 1977 |  July 31, 1981 |  May 19, 1985 |  March 7, 1989 |
| 151 | 153 | 155 | ||
 December 24, 1992 |  October 12, 1996 |  July 31, 2000 | ||
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 2200 | ||||
|---|---|---|---|---|
 September 8, 1801 (Saros 112) |  August 7, 1812 (Saros 113) |  July 8, 1823 (Saros 114) |  June 7, 1834 (Saros 115) |  May 6, 1845 (Saros 116) |
 April 5, 1856 (Saros 117) |  March 6, 1867 (Saros 118) |  February 2, 1878 (Saros 119) |  January 1, 1889 (Saros 120) |  December 3, 1899 (Saros 121) |
 November 2, 1910 (Saros 122) |  October 1, 1921 (Saros 123) |  August 31, 1932 (Saros 124) | August 1, 1943 (Saros 125) |  June 30, 1954 (Saros 126) |
 May 30, 1965 (Saros 127) |  April 29, 1976 (Saros 128) |  March 29, 1987 (Saros 129) |  February 26, 1998 (Saros 130) |  January 26, 2009 (Saros 131) |
 December 26, 2019 (Saros 132) |  November 25, 2030 (Saros 133) |  October 25, 2041 (Saros 134) |  September 22, 2052 (Saros 135) |  August 24, 2063 (Saros 136) |
 July 24, 2074 (Saros 137) |  June 22, 2085 (Saros 138) |  May 22, 2096 (Saros 139) |  April 23, 2107 (Saros 140) |  March 22, 2118 (Saros 141) |
 February 18, 2129 (Saros 142) |  January 20, 2140 (Saros 143) |  December 19, 2150 (Saros 144) |  November 17, 2161 (Saros 145) |  October 17, 2172 (Saros 146) |
 September 16, 2183 (Saros 147) |  August 16, 2194 (Saros 148) | |||
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 | ||
|---|---|---|
 October 20, 1827 (Saros 121) |  September 29, 1856 (Saros 122) |  September 8, 1885 (Saros 123) |
 August 21, 1914 (Saros 124) | August 1, 1943 (Saros 125) |  July 10, 1972 (Saros 126) |
 June 21, 2001 (Saros 127) |  June 1, 2030 (Saros 128) |  May 11, 2059 (Saros 129) |
 April 21, 2088 (Saros 130) |  April 2, 2117 (Saros 131) |  March 12, 2146 (Saros 132) |
 February 21, 2175 (Saros 133) | ||
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