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Solar eclipse of January 3, 1927

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Solar eclipse of January 3, 1927
Map
Type of eclipse
NatureAnnular
Gamma−0.4956
Magnitude0.9995
Maximum eclipse
Duration3 s (0 min 3 s)
Coordinates52°48′S 124°48′W / 52.8°S 124.8°W / -52.8; -124.8
Max. width of band2 km (1.2 mi)
Times (UTC)
Greatest eclipse20:22:53
References
Saros140 (24 of 71)
Catalog # (SE5000)9343

An annular solar eclipse occurred at the Moon's descending node of orbit between Monday, January 3 and Tuesday, January 4, 1927,[1] with a magnitude of 0.9995. 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. The Moon's apparent diameter was near the average diameter because it occurred 8.6 days after apogee (on December 26, 1926, at 7:10 UTC) and 3.3 days before perigee (on January 7, 1927, at 3:00 UTC).[2]

Annularity was visible from New Zealand on January 4 (Tuesday), and Chile, Argentina, Uruguay and southern Brazil on January 3 (Monday). A partial eclipse was visible for parts of Oceania, Antarctica, and South America.

Observations

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View of the eclipse from Buenos Aires

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]

January 3, 1927 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1927 January 03 at 17:44:12.4 UTC
First Umbral External Contact 1927 January 03 at 18:48:36.9 UTC
First Central Line 1927 January 03 at 18:49:09.7 UTC
Greatest Duration 1927 January 03 at 18:49:09.7 UTC
First Umbral Internal Contact 1927 January 03 at 18:49:42.5 UTC
Greatest Eclipse 1927 January 03 at 20:22:53.1 UTC
Equatorial Conjunction 1927 January 03 at 20:23:09.7 UTC
Ecliptic Conjunction 1927 January 03 at 20:28:11.0 UTC
Last Umbral Internal Contact 1927 January 03 at 21:56:05.6 UTC
Last Central Line 1927 January 03 at 21:56:35.8 UTC
Last Umbral External Contact 1927 January 03 at 21:57:05.9 UTC
Last Penumbral External Contact 1927 January 03 at 23:01:27.9 UTC
January 3, 1927 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.99947
Eclipse Obscuration 0.99894
Gamma −0.49559
Sun Right Ascension 18h54m14.6s
Sun Declination -22°51'45.8"
Sun Semi-Diameter 16'15.9"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 18h54m13.9s
Moon Declination -23°20'50.4"
Moon Semi-Diameter 16'01.7"
Moon Equatorial Horizontal Parallax 0°58'49.4"
ΔT 24.5 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 1926–January 1927
December 19
Ascending node (full moon)
January 3
Descending node (new moon)
Penumbral lunar eclipse
Lunar Saros 114
Annular solar eclipse
Solar Saros 140
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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 140

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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.[4]

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 140

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This eclipse is a part of Saros series 140, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on April 16, 1512. It contains total eclipses from July 21, 1656 through November 9, 1836; hybrid eclipses from November 20, 1854 through December 23, 1908; and annular eclipses from January 3, 1927 through December 7, 2485. The series ends at member 71 as a partial eclipse on June 1, 2774. 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 4 minutes, 10 seconds on August 12, 1692, and the longest duration of annularity will be produced by member 53 at 7 minutes, 35 seconds on November 15, 2449. All eclipses in this series occur at the Moon’s descending node of orbit.[5]

Series members 18–39 occur between 1801 and 2200:
18 19 20

October 29, 1818

November 9, 1836

November 20, 1854
21 22 23

November 30, 1872

December 12, 1890

December 23, 1908
24 25 26

January 3, 1927

January 14, 1945

January 25, 1963
27 28 29

February 4, 1981

February 16, 1999

February 26, 2017
30 31 32

March 9, 2035

March 20, 2053

March 31, 2071
33 34 35

April 10, 2089

April 23, 2107

May 3, 2125
36 37 38

May 14, 2143

May 25, 2161

June 5, 2179
39

June 15, 2197

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.

The partial solar eclipses on December 18, 2188 (part of Saros 164) and November 18, 2199 (part of Saros 165) are also a part of this series but are not included in the table below.

Series members between 1801 and 2134

December 10, 1806
(Saros 129)

November 9, 1817
(Saros 130)

October 9, 1828
(Saros 131)

September 7, 1839
(Saros 132)

August 7, 1850
(Saros 133)

July 8, 1861
(Saros 134)

June 6, 1872
(Saros 135)

May 6, 1883
(Saros 136)

April 6, 1894
(Saros 137)

March 6, 1905
(Saros 138)

February 3, 1916
(Saros 139)

January 3, 1927
(Saros 140)

December 2, 1937
(Saros 141)

November 1, 1948
(Saros 142)

October 2, 1959
(Saros 143)

August 31, 1970
(Saros 144)

July 31, 1981
(Saros 145)

June 30, 1992
(Saros 146)

May 31, 2003
(Saros 147)

April 29, 2014
(Saros 148)

March 29, 2025
(Saros 149)

February 27, 2036
(Saros 150)

January 26, 2047
(Saros 151)

December 26, 2057
(Saros 152)

November 24, 2068
(Saros 153)

October 24, 2079
(Saros 154)

September 23, 2090
(Saros 155)

August 24, 2101
(Saros 156)

July 23, 2112
(Saros 157)

June 23, 2123
(Saros 158)

May 23, 2134
(Saros 159)

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 24, 1811
(Saros 136)

March 4, 1840
(Saros 137)

February 11, 1869
(Saros 138)

January 22, 1898
(Saros 139)

January 3, 1927
(Saros 140)

December 14, 1955
(Saros 141)

November 22, 1984
(Saros 142)

November 3, 2013
(Saros 143)

October 14, 2042
(Saros 144)

September 23, 2071
(Saros 145)

September 4, 2100
(Saros 146)

August 15, 2129
(Saros 147)

July 25, 2158
(Saros 148)

July 6, 2187
(Saros 149)

Notes

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  1. ^ "January 3, 1927 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 1927 Jan 03". 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 140". eclipse.gsfc.nasa.gov.

References

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