Solar eclipse of April 7, 1940 | |
---|---|
Type of eclipse | |
Nature | Annular |
Gamma | 0.219 |
Magnitude | 0.9394 |
Maximum eclipse | |
Duration | 450 s (7 min 30 s) |
Coordinates | 19°12′N 128°30′W / 19.2°N 128.5°W |
Max. width of band | 230 km (140 mi) |
Times (UTC) | |
Greatest eclipse | 20:21:21 |
References | |
Saros | 128 (54 of 73) |
Catalog # (SE5000) | 9375 |
An annular solar eclipse occurred at the Moon's descending node of orbit on Sunday, April 7, 1940, with a magnitude of 0.9394. 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. Annularity was visible from Gilbert and Ellice Islands (the part now belonging to Kiribati), Mexico and the United States.
Related eclipses
Eclipses in 1940
- An annular solar eclipse on April 7, 1940.
- A penumbral lunar eclipse on April 22, 1940.
- A total solar eclipse on October 1, 1940.
- A penumbral lunar eclipse on October 16, 1940.
Metonic
- Preceded by: Solar eclipse of June 19, 1936
- Followed by: Solar eclipse of January 25, 1944
Tzolkinex
- Preceded by: Solar eclipse of February 24, 1933
- Followed by: Solar eclipse of May 20, 1947
Half-Saros
- Preceded by: Lunar eclipse of April 2, 1931
- Followed by: Lunar eclipse of April 13, 1949
Tritos
- Preceded by: Solar eclipse of May 9, 1929
- Followed by: Solar eclipse of March 7, 1951
Solar Saros 128
- Preceded by: Solar eclipse of March 28, 1922
- Followed by: Solar eclipse of April 19, 1958
Inex
- Preceded by: Solar eclipse of April 28, 1911
- Followed by: Solar eclipse of March 18, 1969
Triad
- Preceded by: Solar eclipse of June 6, 1853
- Followed by: Solar eclipse of February 6, 2027
Solar eclipses of 1939–1942
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.[1]
The partial solar eclipse on August 12, 1942 occurs in the next lunar year eclipse set.
Solar eclipse series sets from 1939 to 1942 | ||||||
---|---|---|---|---|---|---|
Descending node | Ascending node | |||||
Saros | Map | Gamma | Saros | Map | Gamma | |
118 | April 19, 1939 Annular |
0.9388 | 123 | October 12, 1939 Total |
−0.9737 | |
128 | April 7, 1940 Annular |
0.219 | 133 | October 1, 1940 Total |
−0.2573 | |
138 | March 27, 1941 Annular |
−0.5025 | 143 | September 21, 1941 Total |
0.4649 | |
148 | March 16, 1942 Partial |
−1.1908 | 153 | September 10, 1942 Partial |
1.2571 |
Saros 128
This eclipse is a part of Saros series 128, repeating every 18 years, 11 days, and containing 73 events. The series started with a partial solar eclipse on August 29, 984 AD. It contains total eclipses from May 16, 1417 through June 18, 1471; hybrid eclipses from June 28, 1489 through July 31, 1543; and annular eclipses from August 11, 1561 through July 25, 2120. The series ends at member 73 as a partial eclipse on November 1, 2282. 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 totality was produced by member 27 at 1 minutes, 45 seconds on June 7, 1453, and the longest duration of annularity was produced by member 48 at 8 minutes, 35 seconds on February 1, 1832. All eclipses in this series occur at the Moon’s descending node of orbit.[2]
Series members 47–68 occur between 1801 and 2200: | ||
---|---|---|
47 | 48 | 49 |
January 21, 1814 |
February 1, 1832 |
February 12, 1850 |
50 | 51 | 52 |
February 23, 1868 |
March 5, 1886 |
March 17, 1904 |
53 | 54 | 55 |
March 28, 1922 |
April 7, 1940 |
April 19, 1958 |
56 | 57 | 58 |
April 29, 1976 |
May 10, 1994 |
May 20, 2012 |
59 | 60 | 61 |
June 1, 2030 |
June 11, 2048 |
June 22, 2066 |
62 | 63 | 64 |
July 3, 2084 |
July 15, 2102 |
July 25, 2120 |
65 | 66 | 67 |
August 5, 2138 |
August 16, 2156 |
August 27, 2174 |
68 | ||
September 6, 2192 |
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 descending node.
22 eclipse events between April 8, 1902 and August 31, 1989 | ||||
---|---|---|---|---|
April 7–8 | January 24–25 | November 12 | August 31–September 1 | June 19–20 |
108 | 110 | 112 | 114 | 116 |
April 8, 1902 |
August 31, 1913 |
June 19, 1917 | ||
118 | 120 | 122 | 124 | 126 |
April 8, 1921 |
January 24, 1925 |
November 12, 1928 |
August 31, 1932 |
June 19, 1936 |
128 | 130 | 132 | 134 | 136 |
April 7, 1940 |
January 25, 1944 |
November 12, 1947 |
September 1, 1951 |
June 20, 1955 |
138 | 140 | 142 | 144 | 146 |
April 8, 1959 |
January 25, 1963 |
November 12, 1966 |
August 31, 1970 |
June 20, 1974 |
148 | 150 | 152 | 154 | |
April 7, 1978 |
January 25, 1982 |
November 12, 1985 |
August 31, 1989 |
Notes
- ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
- ^ "NASA - Catalog of Solar Eclipses of Saros 128". eclipse.gsfc.nasa.gov.
References
- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC