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Solar eclipse of August 30, 1924

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Solar eclipse of August 30, 1924
Map
Type of eclipse
NaturePartial
Gamma1.3123
Magnitude0.4245
Maximum eclipse
Coordinates71°30′N 172°54′E / 71.5°N 172.9°E / 71.5; 172.9
Times (UTC)
Greatest eclipse8:23:00
References
Saros153 (4 of 70)
Catalog # (SE5000)9337

A partial solar eclipse occurred at the Moon's ascending node of orbit on Saturday, August 30, 1924,[1] with a magnitude of 0.4245. 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. 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 Greenland, the Russian SFSR, and Northeast Asia.

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.[2]

August 30, 1924 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1924 August 30 at 06:50:49.9 UTC
Equatorial Conjunction 1924 August 30 at 07:40:15.6 UTC
Greatest Eclipse 1924 August 30 at 08:23:00.2 UTC
Ecliptic Conjunction 1924 August 30 at 08:37:02.6 UTC
Last Penumbral External Contact 1924 August 30 at 09:55:25.5 UTC
August 30, 1924 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.42450
Eclipse Obscuration 0.30793
Gamma 1.31228
Sun Right Ascension 10h33m37.7s
Sun Declination +09°04'07.2"
Sun Semi-Diameter 15'50.6"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 10h35m02.3s
Moon Declination +10°15'33.7"
Moon Semi-Diameter 15'29.6"
Moon Equatorial Horizontal Parallax 0°56'51.5"
ΔT 23.6 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 July–August 1924
July 31
Ascending node (new moon)
August 14
Descending node (full moon)
August 30
Ascending node (new moon)
Partial solar eclipse
Solar Saros 115
Total lunar eclipse
Lunar Saros 127
Partial solar eclipse
Solar Saros 153
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Eclipses in 1924

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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 153

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Inex

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Triad

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Solar eclipses of 1921–1924

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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.[3]

The partial solar eclipse on July 31, 1924 occurs in the next lunar year eclipse set.

Solar eclipse series sets from 1921 to 1924
Descending node   Ascending node
Saros Map Gamma Saros Map Gamma
118 April 8, 1921

Annular
0.8869 123 October 1, 1921

Total
−0.9383
128 March 28, 1922

Annular
0.1711 133 September 21, 1922

Total
−0.213
138 March 17, 1923

Annular
−0.5438 143 September 10, 1923

Total
0.5149
148 March 5, 1924

Partial
−1.2232 153 August 30, 1924

Partial
1.3123

Saros 153

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This eclipse is a part of Saros series 153, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on July 28, 1870. It contains annular eclipses from December 17, 2104 through May 26, 2970. There are no hybrid or total eclipses in this set. The series ends at member 70 as a partial eclipse on August 22, 3114. 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 38 at 7 minutes, 1 seconds on September 5, 2537. All eclipses in this series occur at the Moon’s ascending node of orbit.[4]

Series members 1–19 occur between 1870 and 2200:
1 2 3

July 28, 1870

August 7, 1888

August 20, 1906
4 5 6

August 30, 1924

September 10, 1942

September 20, 1960
7 8 9

October 2, 1978

October 12, 1996

October 23, 2014
10 11 12

November 3, 2032

November 14, 2050

November 24, 2068
13 14 15

December 6, 2086

December 17, 2104

December 28, 2122
16 17 18

January 8, 2141

January 19, 2159

January 29, 2177
19

February 10, 2195

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 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

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 1946

August 5, 1804
(Saros 142)

July 6, 1815
(Saros 143)

June 5, 1826
(Saros 144)

May 4, 1837
(Saros 145)

April 3, 1848
(Saros 146)

March 4, 1859
(Saros 147)

January 31, 1870
(Saros 148)

December 31, 1880
(Saros 149)

December 1, 1891
(Saros 150)

October 31, 1902
(Saros 151)

September 30, 1913
(Saros 152)

August 30, 1924
(Saros 153)

July 30, 1935
(Saros 154)

June 29, 1946
(Saros 155)

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 2069

November 18, 1808
(Saros 149)

October 29, 1837
(Saros 150)

October 8, 1866
(Saros 151)

September 18, 1895
(Saros 152)

August 30, 1924
(Saros 153)

August 9, 1953
(Saros 154)

July 20, 1982
(Saros 155)

July 1, 2011
(Saros 156)

May 20, 2069
(Saros 158)

References

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  1. ^ "August 30, 1924 Partial Solar Eclipse". timeanddate. Retrieved 2 August 2024.
  2. ^ "Partial Solar Eclipse of 1924 Aug 30". EclipseWise.com. Retrieved 2 August 2024.
  3. ^ 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.
  4. ^ "NASA - Catalog of Solar Eclipses of Saros 153". eclipse.gsfc.nasa.gov.
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