Solar eclipse of August 10, 1934

An annular solar eclipse occurred at the Moon's descending node of orbit on Friday, August 10, 1934,[1] with a magnitude of 0.9436. 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 1.4 days after apogee (on August 8, 1934, at 22:10 UTC), the Moon's apparent diameter was smaller.[2]

Solar eclipse of August 10, 1934
Map
Type of eclipse
NatureAnnular
Gamma−0.689
Magnitude0.9436
Maximum eclipse
Duration393 s (6 min 33 s)
Coordinates24°30′S 34°36′E / 24.5°S 34.6°E / -24.5; 34.6
Max. width of band280 km (170 mi)
Times (UTC)
Greatest eclipse8:37:48
References
Saros144 (12 of 70)
Catalog # (SE5000)9361

Annularity was visible from Portuguese West Africa, South West Africa, Rhodesia, Bechuanaland Protectorate, Mozambique, Transvaal, and Swaziland. A partial eclipse was visible for parts of Southern Africa, Central Africa, East Africa, and Antarctica.

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 10, 1934 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1934 August 10 at 05:51:14.0 UTC
First Umbral External Contact 1934 August 10 at 07:08:49.0 UTC
First Central Line 1934 August 10 at 07:12:00.6 UTC
First Umbral Internal Contact 1934 August 10 at 07:15:15.6 UTC
Greatest Duration 1934 August 10 at 08:26:09.6 UTC
Greatest Eclipse 1934 August 10 at 08:37:47.5 UTC
Ecliptic Conjunction 1934 August 10 at 08:45:56.7 UTC
Equatorial Conjunction 1934 August 10 at 09:12:57.7 UTC
Last Umbral Internal Contact 1934 August 10 at 09:59:57.4 UTC
Last Central Line 1934 August 10 at 10:03:12.2 UTC
Last Umbral External Contact 1934 August 10 at 10:06:23.4 UTC
Last Penumbral External Contact 1934 August 10 at 11:24:05.2 UTC
August 10, 1934 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.94361
Eclipse Obscuration 0.89039
Gamma −0.68896
Sun Right Ascension 09h17m53.7s
Sun Declination 15°44'27.3"
Sun Semi-Diameter 15'46.8"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 09h16m52.8s
Moon Declination 15°10'20.0"
Moon Semi-Diameter 14'43.8"
Moon Equatorial Horizontal Parallax 0°54'03.6"
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.

Eclipse season of July–August 1934
July 26
Ascending node (full moon)
August 10
Descending node (new moon)
   
Partial lunar eclipse
Lunar Saros 118
Annular solar eclipse
Solar Saros 144
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Eclipses in 1934

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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 144

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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 144

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This eclipse is a part of Saros series 144, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on April 11, 1736. It contains annular eclipses from July 7, 1880 through August 27, 2565. There are no hybrid or total eclipses in this set. The series ends at member 70 as a partial eclipse on May 5, 2980. 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 will be produced by member 51 at 9 minutes, 52 seconds on December 29, 2168. All eclipses in this series occur at the Moon’s descending node of orbit.[5]

Series members 5–26 occur between 1801 and 2200:
5 6 7
 
May 25, 1808
 
June 5, 1826
 
June 16, 1844
8 9 10
 
June 27, 1862
 
July 7, 1880
 
July 18, 1898
11 12 13
 
July 30, 1916
 
August 10, 1934
 
August 20, 1952
14 15 16
 
August 31, 1970
 
September 11, 1988
 
September 22, 2006
17 18 19
 
October 2, 2024
 
October 14, 2042
 
October 24, 2060
20 21 22
 
November 4, 2078
 
November 15, 2096
 
November 27, 2114
23 24 25
 
December 7, 2132
 
December 19, 2150
 
December 29, 2168
26
 
January 9, 2187

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 16, 1866 and August 9, 1953
March 16–17 January 1–3 October 20–22 August 9–10 May 27–29
108 110 112 114 116
 
March 16, 1866
 
August 9, 1877
 
May 27, 1881
118 120 122 124 126
 
March 16, 1885
 
January 1, 1889
 
October 20, 1892
 
August 9, 1896
 
May 28, 1900
128 130 132 134 136
 
March 17, 1904
 
January 3, 1908
 
October 22, 1911
 
August 10, 1915
 
May 29, 1919
138 140 142 144 146
 
March 17, 1923
 
January 3, 1927
 
October 21, 1930
 
August 10, 1934
 
May 29, 1938
148 150 152 154
 
March 16, 1942
 
January 3, 1946
 
October 21, 1949
 
August 9, 1953

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 2087
 
August 17, 1803
(Saros 132)
 
July 17, 1814
(Saros 133)
 
June 16, 1825
(Saros 134)
 
May 15, 1836
(Saros 135)
 
April 15, 1847
(Saros 136)
 
March 15, 1858
(Saros 137)
 
February 11, 1869
(Saros 138)
 
January 11, 1880
(Saros 139)
 
December 12, 1890
(Saros 140)
 
November 11, 1901
(Saros 141)
 
October 10, 1912
(Saros 142)
 
September 10, 1923
(Saros 143)
 
August 10, 1934
(Saros 144)
 
July 9, 1945
(Saros 145)
 
June 8, 1956
(Saros 146)
 
May 9, 1967
(Saros 147)
 
April 7, 1978
(Saros 148)
 
March 7, 1989
(Saros 149)
 
February 5, 2000
(Saros 150)
 
January 4, 2011
(Saros 151)
 
December 4, 2021
(Saros 152)
 
November 3, 2032
(Saros 153)
 
October 3, 2043
(Saros 154)
 
September 2, 2054
(Saros 155)
 
August 2, 2065
(Saros 156)
 
July 1, 2076
(Saros 157)
 
June 1, 2087
(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
 
October 29, 1818
(Saros 140)
 
October 9, 1847
(Saros 141)
 
September 17, 1876
(Saros 142)
 
August 30, 1905
(Saros 143)
 
August 10, 1934
(Saros 144)
 
July 20, 1963
(Saros 145)
 
June 30, 1992
(Saros 146)
 
June 10, 2021
(Saros 147)
 
May 20, 2050
(Saros 148)
 
May 1, 2079
(Saros 149)
 
April 11, 2108
(Saros 150)
 
March 21, 2137
(Saros 151)
 
March 2, 2166
(Saros 152)
 
February 10, 2195
(Saros 153)

Notes

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  1. ^ "August 10, 1934 Annular Solar Eclipse". timeanddate. Retrieved August 3, 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved August 3, 2024.
  3. ^ "Annular Solar Eclipse of 1934 Aug 10". EclipseWise.com. Retrieved August 3, 2024.
  4. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved October 6, 2018.
  5. ^ "NASA - Catalog of Solar Eclipses of Saros 144". eclipse.gsfc.nasa.gov.

References

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