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Solar eclipse of December 24, 1927

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Solar eclipse of December 24, 1927
Map
Type of eclipse
NaturePartial
Gamma−1.2416
Magnitude0.549
Maximum eclipse
Coordinates66°06′S 47°42′W / 66.1°S 47.7°W / -66.1; -47.7
Times (UTC)
Greatest eclipse3:59:41
References
Saros150 (12 of 71)
Catalog # (SE5000)9345

A partial solar eclipse occurred at the Moon's descending node of orbit on Saturday, December 24, 1927,[1] with a magnitude of 0.549. 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 most of 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.[2]

December 24, 1927 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1927 December 24 at 02:10:08.1 UTC
Greatest Eclipse 1927 December 24 at 03:59:41.1 UTC
Equatorial Conjunction 1927 December 24 at 04:12:05.4 UTC
Ecliptic Conjunction 1927 December 24 at 04:13:34.1 UTC
Last Penumbral External Contact 1927 December 24 at 05:49:03.8 UTC
December 24, 1927 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.54900
Eclipse Obscuration 0.43598
Gamma −1.24161
Sun Right Ascension 18h05m51.9s
Sun Declination -23°26'31.6"
Sun Semi-Diameter 16'15.7"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 18h05m25.7s
Moon Declination -24°35'11.1"
Moon Semi-Diameter 15'09.9"
Moon Equatorial Horizontal Parallax 0°55'39.4"
ΔT 24.3 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 December 1927
December 8
Ascending node (full moon)
December 24
Descending node (new moon)
Total lunar eclipse
Lunar Saros 124
Partial solar eclipse
Solar Saros 150
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Eclipses in 1927

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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 150

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Inex

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Triad

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Solar eclipses of 1924–1928

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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 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 150

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This eclipse is a part of Saros series 150, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on August 24, 1729. It contains annular eclipses from April 22, 2126 through June 22, 2829. There are no hybrid or total eclipses in this set. The series ends at member 71 as a partial eclipse on September 29, 2991. 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 45 at 9 minutes, 58 seconds on December 19, 2522. All eclipses in this series occur at the Moon’s descending node of orbit.[4]

Series members 5–27 occur between 1801 and 2200:
5 6 7

October 7, 1801

October 19, 1819

October 29, 1837
8 9 10

November 9, 1855

November 20, 1873

December 1, 1891
11 12 13

December 12, 1909

December 24, 1927

January 3, 1946
14 15 16

January 14, 1964

January 25, 1982

February 5, 2000
17 18 19

February 15, 2018

February 27, 2036

March 9, 2054
20 21 22

March 19, 2072

March 31, 2090

April 11, 2108
23 24 25

April 22, 2126

May 3, 2144

May 14, 2162
26 27

May 24, 2180

June 4, 2198

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 5, 1848 and July 30, 1935
March 5–6 December 22–24 October 9–11 July 29–30 May 17–18
108 110 112 114 116

March 5, 1848

July 29, 1859

May 17, 1863
118 120 122 124 126

March 6, 1867

December 22, 1870

October 10, 1874

July 29, 1878

May 17, 1882
128 130 132 134 136

March 5, 1886

December 22, 1889

October 9, 1893

July 29, 1897

May 18, 1901
138 140 142 144 146

March 6, 1905

December 23, 1908

October 10, 1912

July 30, 1916

May 18, 1920
148 150 152 154

March 5, 1924

December 24, 1927

October 11, 1931

July 30, 1935

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 1982

November 29, 1807
(Saros 139)

October 29, 1818
(Saros 140)

September 28, 1829
(Saros 141)

August 27, 1840
(Saros 142)

July 28, 1851
(Saros 143)

June 27, 1862
(Saros 144)

May 26, 1873
(Saros 145)

April 25, 1884
(Saros 146)

March 26, 1895
(Saros 147)

February 23, 1906
(Saros 148)

January 23, 1917
(Saros 149)

December 24, 1927
(Saros 150)

November 21, 1938
(Saros 151)

October 21, 1949
(Saros 152)

September 20, 1960
(Saros 153)

August 20, 1971
(Saros 154)

July 20, 1982
(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 2200

March 13, 1812
(Saros 146)

February 21, 1841
(Saros 147)

January 31, 1870
(Saros 148)

January 11, 1899
(Saros 149)

December 24, 1927
(Saros 150)

December 2, 1956
(Saros 151)

November 12, 1985
(Saros 152)

October 23, 2014
(Saros 153)

October 3, 2043
(Saros 154)

September 12, 2072
(Saros 155)

August 24, 2101
(Saros 156)

August 4, 2130
(Saros 157)

July 15, 2159
(Saros 158)

June 24, 2188
(Saros 159)

References

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  1. ^ "December 24, 1927 Partial Solar Eclipse". timeanddate. Retrieved 3 August 2024.
  2. ^ "Partial Solar Eclipse of 1927 Dec 24". EclipseWise.com. Retrieved 3 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 150". eclipse.gsfc.nasa.gov.
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