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Solar eclipse of August 21, 1933

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Solar eclipse of August 21, 1933
Map
Type of eclipse
NatureAnnular
Gamma0.0869
Magnitude0.9801
Maximum eclipse
Duration124 s (2 min 4 s)
Coordinates16°54′N 95°54′E / 16.9°N 95.9°E / 16.9; 95.9
Max. width of band71 km (44 mi)
Times (UTC)
Greatest eclipse5:49:11
References
Saros134 (39 of 71)
Catalog # (SE5000)9359

An annular solar eclipse occurred at the Moon's descending node of orbit on Monday, August 21, 1933,[1] with a magnitude of 0.9801. 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 only 5.6 days after apogee (on August 15, 1933, at 15:40 UTC), the Moon's apparent diameter was smaller.[2]

Annularity was visible from Italian Libya (today's Libya), Egypt, Mandatory Palestine (today's Israel, Palestine and Jordan) including Jerusalem and Amman, French Mandate for Syria and the Lebanon (the part now belonging to Syria), Iraq including Baghdad, Persia, Afghanistan, British Raj (the parts now belonging to Pakistan, India, Bangladesh and Myanmar), Siam (name changed to Thailand later), Dutch East Indies (today's Indonesia), North Borneo (now belonging to Malaysia), and Australia. A partial eclipse was visible for parts of Northeast Africa, Eastern Europe, Asia, and Australia.

Eclipse details

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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]

August 21, 1933 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1933 August 21 at 02:52:30.3 UTC
First Umbral External Contact 1933 August 21 at 03:54:48.4 UTC
First Central Line 1933 August 21 at 03:55:58.9 UTC
Greatest Duration 1933 August 21 at 03:55:58.9 UTC
First Umbral Internal Contact 1933 August 21 at 03:57:09.4 UTC
First Penumbral Internal Contact 1933 August 21 at 04:59:51.0 UTC
Equatorial Conjunction 1933 August 21 at 05:44:23.7 UTC
Ecliptic Conjunction 1933 August 21 at 05:48:11.5 UTC
Greatest Eclipse 1933 August 21 at 05:49:10.9 UTC
Last Penumbral Internal Contact 1933 August 21 at 06:38:38.7 UTC
Last Umbral Internal Contact 1933 August 21 at 07:41:17.5 UTC
Last Central Line 1933 August 21 at 07:42:25.2 UTC
Last Umbral External Contact 1933 August 21 at 07:43:32.9 UTC
Last Penumbral External Contact 1933 August 21 at 08:45:47.4 UTC
August 21, 1933 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.98011
Eclipse Obscuration 0.96062
Gamma 0.08688
Sun Right Ascension 09h59m34.9s
Sun Declination +12°16'29.3"
Sun Semi-Diameter 15'48.7"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 09h59m43.6s
Moon Declination +12°20'51.3"
Moon Semi-Diameter 15'15.5"
Moon Equatorial Horizontal Parallax 0°55'59.9"
ΔT 23.9 s

Eclipse season

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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 August–September 1933
August 5
Ascending node (full moon)
August 21
Descending node (new moon)
September 4
Ascending node (full moon)
Penumbral lunar eclipse
Lunar Saros 108
Annular solar eclipse
Solar Saros 134
Penumbral lunar eclipse
Lunar Saros 146
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Eclipses in 1933

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Solar Saros 134

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Inex

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Triad

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Solar eclipses of 1931–1935

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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 April 18, 1931 and October 11, 1931 occur in the previous lunar year eclipse set, and the solar eclipses on January 5, 1935 (partial), June 30, 1935 (partial), and December 25, 1935 (annular) occur in the next lunar year eclipse set.

Solar eclipse series sets from 1931 to 1935
Descending node   Ascending node
Saros Map Gamma Saros Map Gamma
114 September 12, 1931

Partial
1.506 119 March 7, 1932

Annular
−0.9673
124 August 31, 1932

Total
0.8307 129 February 24, 1933

Annular
−0.2191
134 August 21, 1933

Annular
0.0869 139 February 14, 1934

Total
0.4868
144 August 10, 1934

Annular
−0.689 149 February 3, 1935

Partial
1.1438
154 July 30, 1935

Partial
−1.4259

Saros 134

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This eclipse is a part of Saros series 134, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on June 22, 1248. It contains total eclipses from October 9, 1428 through December 24, 1554; hybrid eclipses from January 3, 1573 through June 27, 1843; and annular eclipses from July 8, 1861 through May 21, 2384. The series ends at member 72 as a partial eclipse on August 6, 2510. 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 11 at 1 minutes, 30 seconds on October 9, 1428, and the longest duration of annularity will be produced by member 52 at 10 minutes, 55 seconds on January 10, 2168. All eclipses in this series occur at the Moon’s descending node of orbit.[5]

Series members 32–53 occur between 1801 and 2200:
32 33 34

June 6, 1807

June 16, 1825

June 27, 1843
35 36 37

July 8, 1861

July 19, 1879

July 29, 1897
38 39 40

August 10, 1915

August 21, 1933

September 1, 1951
41 42 43

September 11, 1969

September 23, 1987

October 3, 2005
44 45 46

October 14, 2023

October 25, 2041

November 5, 2059
47 48 49

November 15, 2077

November 27, 2095

December 8, 2113
50 51 52

December 19, 2131

December 30, 2149

January 10, 2168
53

January 20, 2186

Metonic series

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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 March 27, 1884 and August 20, 1971
March 27–29 January 14 November 1–2 August 20–21 June 8
108 110 112 114 116

March 27, 1884

August 20, 1895

June 8, 1899
118 120 122 124 126

March 29, 1903

January 14, 1907

November 2, 1910

August 21, 1914

June 8, 1918
128 130 132 134 136

March 28, 1922

January 14, 1926

November 1, 1929

August 21, 1933

June 8, 1937
138 140 142 144 146

March 27, 1941

January 14, 1945

November 1, 1948

August 20, 1952

June 8, 1956
148 150 152 154

March 27, 1960

January 14, 1964

November 2, 1967

August 20, 1971

Tritos series

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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

August 28, 1802
(Saros 122)

July 27, 1813
(Saros 123)

June 26, 1824
(Saros 124)

May 27, 1835
(Saros 125)

April 25, 1846
(Saros 126)

March 25, 1857
(Saros 127)

February 23, 1868
(Saros 128)

January 22, 1879
(Saros 129)

December 22, 1889
(Saros 130)

November 22, 1900
(Saros 131)

October 22, 1911
(Saros 132)

September 21, 1922
(Saros 133)

August 21, 1933
(Saros 134)

July 20, 1944
(Saros 135)

June 20, 1955
(Saros 136)

May 20, 1966
(Saros 137)

April 18, 1977
(Saros 138)

March 18, 1988
(Saros 139)

February 16, 1999
(Saros 140)

January 15, 2010
(Saros 141)

December 14, 2020
(Saros 142)

November 14, 2031
(Saros 143)

October 14, 2042
(Saros 144)

September 12, 2053
(Saros 145)

August 12, 2064
(Saros 146)

July 13, 2075
(Saros 147)

June 11, 2086
(Saros 148)

May 11, 2097
(Saros 149)

April 11, 2108
(Saros 150)

March 11, 2119
(Saros 151)

February 8, 2130
(Saros 152)

January 8, 2141
(Saros 153)

December 8, 2151
(Saros 154)

November 7, 2162
(Saros 155)

October 7, 2173
(Saros 156)

September 4, 2184
(Saros 157)

August 5, 2195
(Saros 158)

Inex series

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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

November 9, 1817
(Saros 130)

October 20, 1846
(Saros 131)

September 29, 1875
(Saros 132)

September 9, 1904
(Saros 133)

August 21, 1933
(Saros 134)

July 31, 1962
(Saros 135)

July 11, 1991
(Saros 136)

June 21, 2020
(Saros 137)

May 31, 2049
(Saros 138)

May 11, 2078
(Saros 139)

April 23, 2107
(Saros 140)

April 1, 2136
(Saros 141)

March 12, 2165
(Saros 142)

February 21, 2194
(Saros 143)

Notes

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  1. ^ "August 21, 1933 Annular Solar Eclipse". timeanddate. Retrieved 3 August 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 3 August 2024.
  3. ^ "Annular Solar Eclipse of 1933 Aug 21". EclipseWise.com. Retrieved 3 August 2024.
  4. ^ 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.
  5. ^ "NASA - Catalog of Solar Eclipses of Saros 134". eclipse.gsfc.nasa.gov.

References

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