| Partial eclipse | |
 Map | |
| Gamma | 1.3147 |
|---|---|
| Magnitude | 0.4244 |
| Maximum eclipse | |
| Coordinates | 61°12′N175°42′E / 61.2°N 175.7°E /61.2; 175.7 |
| Times (UTC) | |
| Greatest eclipse | 17:33:07 |
| References | |
| Saros | 147 (17 of 80) |
| Catalog # (SE5000) | 9310 |
A partialsolar eclipse occurred at the Moon'sascending node of orbit on Sunday, April 6, 1913,[1][2][3] with amagnitude of 0.4244. 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.
A partial eclipse was visible for parts of easternRussia, northwesternNorth America.
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.[4]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1913 April 6 at 15:54:06.5 UTC |
| Greatest Eclipse | 1913 April 6 at 17:33:07.1 UTC |
| Ecliptic Conjunction | 1913 April 6 at 17:48:01.1 UTC |
| Equatorial Conjunction | 1913 April 6 at 18:55:10.9 UTC |
| Last Penumbral External Contact | 1913 April 6 at 19:11:31.1 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.42437 |
| Eclipse Obscuration | 0.30366 |
| Gamma | 1.31475 |
| Sun Right Ascension | 01h00m06.2s |
| Sun Declination | +06°25'02.8" |
| Sun Semi-Diameter | 15'58.5" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 00h57m49.4s |
| Moon Declination | +07°28'25.6" |
| Moon Semi-Diameter | 14'56.5" |
| Moon Equatorial Horizontal Parallax | 0°54'50.2" |
| ΔT | 15.0 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.
| March 22 Descending node (full moon) | April 6 Ascending node (new moon) |
|---|---|
 | |
| Total lunar eclipse Lunar Saros 121 | Partial solar eclipse Solar Saros 147 |
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.[5]
The partial solar eclipse onAugust 31, 1913 occurs in the next lunar year eclipse set.
| Solar eclipse series sets from 1910 to 1913 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 117 | May 9, 1910 Total | −0.9437 | 122 | November 2, 1910 Partial | 1.0603 | |
| 127 | April 28, 1911 Total | −0.2294 | 132 | October 22, 1911 Annular | 0.3224 | |
| 137 | April 17, 1912 Hybrid | 0.528 | 142 | October 10, 1912 Total | −0.4149 | |
| 147 | April 6, 1913 Partial | 1.3147 | 152 | September 30, 1913 Partial | −1.1005 | |
This eclipse is a part ofSaros series 147, repeating every 18 years, 11 days, and containing 80 events. The series started with a partial solar eclipse on October 12, 1624. It contains annular eclipses fromMay 31, 2003 through July 31, 2706. There are no hybrid or total eclipses in this set. The series ends at member 80 as a partial eclipse on February 24, 3049. 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 annularity will be produced by member 38 at 9 minutes, 41 seconds on November 21, 2291. All eclipses in this series occur at the Moon’sascending node of orbit.[6]
| Series members 11–32 occur between 1801 and 2200: | ||
|---|---|---|
| 11 | 12 | 13 |
 January 30, 1805 |  February 11, 1823 |  February 21, 1841 |
| 14 | 15 | 16 |
 March 4, 1859 |  March 15, 1877 |  March 26, 1895 |
| 17 | 18 | 19 |
April 6, 1913 |  April 18, 1931 |  April 28, 1949 |
| 20 | 21 | 22 |
 May 9, 1967 |  May 19, 1985 |  May 31, 2003 |
| 23 | 24 | 25 |
 June 10, 2021 |  June 21, 2039 |  July 1, 2057 |
| 26 | 27 | 28 |
 July 13, 2075 |  July 23, 2093 |  August 4, 2111 |
| 29 | 30 | 31 |
 August 15, 2129 |  August 26, 2147 |  September 5, 2165 |
| 32 | ||
 September 16, 2183 | ||
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.
| 25 eclipse events between April 5, 1837 and June 17, 1928 | ||||
|---|---|---|---|---|
| April 5–6 | January 22–23 | November 10–11 | August 28–30 | June 17–18 |
| 107 | 109 | 111 | 113 | 115 |
 April 5, 1837 |  January 22, 1841 |  November 10, 1844 |  August 28, 1848 |  June 17, 1852 |
| 117 | 119 | 121 | 123 | 125 |
 April 5, 1856 |  January 23, 1860 |  November 11, 1863 |  August 29, 1867 |  June 18, 1871 |
| 127 | 129 | 131 | 133 | 135 |
 April 6, 1875 |  January 22, 1879 |  November 10, 1882 |  August 29, 1886 |  June 17, 1890 |
| 137 | 139 | 141 | 143 | 145 |
 April 6, 1894 |  January 22, 1898 |  November 11, 1901 |  August 30, 1905 |  June 17, 1909 |
| 147 | 149 | 151 | 153 | 155 |
April 6, 1913 |  January 23, 1917 |  November 10, 1920 |  August 30, 1924 |  June 17, 1928 |
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.
The partial solar eclipse onOctober 24, 2098 (part of Saros 164) is also a part of this series but is not included in the table below.
| Series members between 1801 and 2011 | ||||
|---|---|---|---|---|
 February 11, 1804 (Saros 137) |  January 10, 1815 (Saros 138) |  December 9, 1825 (Saros 139) |  November 9, 1836 (Saros 140) |  October 9, 1847 (Saros 141) |
 September 7, 1858 (Saros 142) |  August 7, 1869 (Saros 143) |  July 7, 1880 (Saros 144) |  June 6, 1891 (Saros 145) |  May 7, 1902 (Saros 146) |
April 6, 1913 (Saros 147) |  March 5, 1924 (Saros 148) |  February 3, 1935 (Saros 149) |  January 3, 1946 (Saros 150) |  December 2, 1956 (Saros 151) |
 November 2, 1967 (Saros 152) |  October 2, 1978 (Saros 153) |  August 31, 1989 (Saros 154) |  July 31, 2000 (Saros 155) |  July 1, 2011 (Saros 156) |
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 | ||
|---|---|---|
 June 5, 1826 (Saros 144) |  May 16, 1855 (Saros 145) |  April 25, 1884 (Saros 146) |
April 6, 1913 (Saros 147) |  March 16, 1942 (Saros 148) |  February 25, 1971 (Saros 149) |
 February 5, 2000 (Saros 150) |  January 14, 2029 (Saros 151) |  December 26, 2057 (Saros 152) |
 December 6, 2086 (Saros 153) |  November 16, 2115 (Saros 154) |  October 26, 2144 (Saros 155) |
 October 7, 2173 (Saros 156) | ||
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