Solar eclipse of July 9, 1926

Solar eclipse of July 9, 1926
Solar eclipse of July 9, 1926
	Map
Type of eclipse
Nature	Annular
Gamma	0.0538
Magnitude	0.968
Maximum eclipse
Duration	231 s (3 min 51 s)
Coordinates	25°36′N 165°06′W / 25.6°N 165.1°W
Max. width of band	115 km (71 mi)
Times (UTC)
Greatest eclipse	23:06:02
References
Saros	135 (34 of 71)
Catalog # (SE5000)	9342

An annular solar eclipse occurred at the Moon's ascending node of orbit between Friday, July 9 and Saturday, July 10, 1926,^[1] with a magnitude of 0.968. 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. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring about 4.3 days before apogee (on July 14, 1926, at 5:50 UTC), the Moon's apparent diameter was smaller.^[2]

Annularity was visible from the islands of Pulo Anna and Merir in Japan's South Seas Mandate (now in Palau) and Wake Island on July 10 (Saturday), and Midway Atoll on July 9 (Friday). A partial eclipse was visible for parts of Northeast Asia, northern Oceania, Hawaii, southern North America, and Central America.

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.^[3]

July 9, 1926 Solar Eclipse Times
Event	Time (UTC)
First Penumbral External Contact	1926 July 09 at 20:05:21.4 UTC
First Umbral External Contact	1926 July 09 at 21:08:43.5 UTC
First Central Line	1926 July 09 at 21:10:16.8 UTC
First Umbral Internal Contact	1926 July 09 at 21:11:50.1 UTC
First Penumbral Internal Contact	1926 July 09 at 22:15:23.2 UTC
Equatorial Conjunction	1926 July 09 at 23:05:52.4 UTC
Greatest Eclipse	1926 July 09 at 23:06:02.0 UTC
Ecliptic Conjunction	1926 July 09 at 23:06:39.5 UTC
Greatest Duration	1926 July 09 at 23:08:37.8 UTC
Last Penumbral Internal Contact	1926 July 09 at 23:56:40.1 UTC
Last Umbral Internal Contact	1926 July 10 at 01:00:12.3 UTC
Last Central Line	1926 July 10 at 01:01:48.0 UTC
Last Umbral External Contact	1926 July 10 at 01:03:23.6 UTC
Last Penumbral External Contact	1926 July 10 at 02:06:47.9 UTC

July 9, 1926 Solar Eclipse Parameters
Parameter	Value
Eclipse Magnitude	0.96799
Eclipse Obscuration	0.93701
Gamma	0.05379
Sun Right Ascension	07h13m29.8s
Sun Declination	+22°22'23.4"
Sun Semi-Diameter	15'43.9"
Sun Equatorial Horizontal Parallax	08.6"
Moon Right Ascension	07h13m30.1s
Moon Declination	+22°25'20.5"
Moon Semi-Diameter	14'59.8"
Moon Equatorial Horizontal Parallax	0°55'02.2"
ΔT	24.2 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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of June–July 1926
June 25 Descending node (full moon)	July 9 Ascending node (new moon)	July 25 Descending node (full moon)

Penumbral lunar eclipse Lunar Saros 109	Total solar eclipse Solar Saros 135	Penumbral lunar eclipse Lunar Saros 147

Related eclipses

Solar eclipses of 1924–1928

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.^[4]

The partial solar eclipses on March 5, 1924 and August 30, 1924 occur in the previous lunar year eclipse set, and the solar eclipses on May 19, 1928 and November 12, 1928 occur in the next lunar year eclipse set.

Solar eclipse series sets from 1924 to 1928
Ascending node			Descending node
Saros	Map	Gamma	Saros	Map	Gamma
115	July 31, 1924 Partial	−1.4459	120	January 24, 1925 Total	0.8661
125	July 20, 1925 Annular	−0.7193	130 Totality in Sumatra, Indonesia	January 14, 1926 Total	0.1973
135	July 9, 1926 Annular	0.0538	140	January 3, 1927 Annular	−0.4956
145	June 29, 1927 Total	0.8163	150	December 24, 1927 Partial	−1.2416
155	June 17, 1928 Partial	1.5107

Saros 135

This eclipse is a part of Saros series 135, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on July 5, 1331. It contains annular eclipses from October 21, 1511 through February 24, 2305; hybrid eclipses on March 8, 2323 and March 18, 2341; and total eclipses from March 29, 2359 through May 22, 2449. The series ends at member 71 as a partial eclipse on August 17, 2593. 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 annularity was produced by member 16 at 10 minutes, 41 seconds on December 24, 1601, and the longest duration of totality will be produced by member 62 at 2 minutes, 27 seconds on May 12, 2431. All eclipses in this series occur at the Moon’s ascending node of orbit.^[5]

Series members 28–49 occur between 1801 and 2200:
28	29	30
May 5, 1818	May 15, 1836	May 26, 1854
31	32	33
June 6, 1872	June 17, 1890	June 28, 1908
34	35	36
July 9, 1926	July 20, 1944	July 31, 1962
37	38	39
August 10, 1980	August 22, 1998	September 1, 2016
40	42	42
September 12, 2034	September 22, 2052	October 4, 2070
43	44	45
October 14, 2088	October 26, 2106	November 6, 2124
46	47	48
November 17, 2142	November 27, 2160	December 9, 2178
49
December 19, 2196

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 December 2, 1880 and July 9, 1964
December 2–3	September 20–21	July 9–10	April 26–28	February 13–14
111	113	115	117	119
December 2, 1880		July 9, 1888	April 26, 1892	February 13, 1896
121	123	125	127	129
December 3, 1899	September 21, 1903	July 10, 1907	April 28, 1911	February 14, 1915
131	133	135	137	139
December 3, 1918	September 21, 1922	July 9, 1926	April 28, 1930	February 14, 1934
141	143	145	147	149
December 2, 1937	September 21, 1941	July 9, 1945	April 28, 1949	February 14, 1953
151	153	155
December 2, 1956	September 20, 1960	July 9, 1964

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.

Series members between 1801 and 2200
June 16, 1806 (Saros 124)	May 16, 1817 (Saros 125)	April 14, 1828 (Saros 126)	March 15, 1839 (Saros 127)	February 12, 1850 (Saros 128)
January 11, 1861 (Saros 129)	December 12, 1871 (Saros 130)	November 10, 1882 (Saros 131)	October 9, 1893 (Saros 132)	September 9, 1904 (Saros 133)
August 10, 1915 (Saros 134)	July 9, 1926 (Saros 135)	June 8, 1937 (Saros 136)	May 9, 1948 (Saros 137)	April 8, 1959 (Saros 138)
March 7, 1970 (Saros 139)	February 4, 1981 (Saros 140)	January 4, 1992 (Saros 141)	December 4, 2002 (Saros 142)	November 3, 2013 (Saros 143)
October 2, 2024 (Saros 144)	September 2, 2035 (Saros 145)	August 2, 2046 (Saros 146)	July 1, 2057 (Saros 147)	May 31, 2068 (Saros 148)
May 1, 2079 (Saros 149)	March 31, 2090 (Saros 150)	February 28, 2101 (Saros 151)	January 29, 2112 (Saros 152)	December 28, 2122 (Saros 153)
November 26, 2133 (Saros 154)	October 26, 2144 (Saros 155)	September 26, 2155 (Saros 156)	August 25, 2166 (Saros 157)	July 25, 2177 (Saros 158)
June 24, 2188 (Saros 159)	May 24, 2199 (Saros 160)

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
September 28, 1810 (Saros 131)	September 7, 1839 (Saros 132)	August 18, 1868 (Saros 133)
July 29, 1897 (Saros 134)	July 9, 1926 (Saros 135)	June 20, 1955 (Saros 136)
May 30, 1984 (Saros 137)	May 10, 2013 (Saros 138)	April 20, 2042 (Saros 139)
March 31, 2071 (Saros 140)	March 10, 2100 (Saros 141)	February 18, 2129 (Saros 142)
January 30, 2158 (Saros 143)	January 9, 2187 (Saros 144)