Solar eclipse of April 8, 1902

20th-century partial solar eclipse
71°42′N 142°24′W / 71.7°N 142.4°W / 71.7; -142.4Times (UTC)Greatest eclipse14:05:06ReferencesSaros108 (76 of 76)Catalog # (SE5000)9286

A partial solar eclipse occurred at the Moon's descending node of orbit on Tuesday, April 8, 1902,[1][2][3] with a magnitude of 0.0643. 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 Northern Canada. This was the 76th and final event from Solar Saros 108.

Eclipse details

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.[4]

April 8, 1902 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1902 April 08 at 13:30:48.0 UTC
Ecliptic Conjunction 1902 April 08 at 13:49:56.8 UTC
Greatest Eclipse 1902 April 08 at 14:05:06.1 UTC
Last Penumbral External Contact 1902 April 08 at 14:38:58.1 UTC
Equatorial Conjunction 1902 April 08 at 14:53:23.6 UTC
April 8, 1902 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.06431
Eclipse Obscuration 0.01951
Gamma 1.50241
Sun Right Ascension 01h05m40.1s
Sun Declination +06°59'22.0"
Sun Semi-Diameter 15'58.0"
Sun Equatorial Horizontal Parallax 08.8"
Moon Right Ascension 01h03m53.9s
Moon Declination +08°25'24.6"
Moon Semi-Diameter 16'21.4"
Moon Equatorial Horizontal Parallax 1°00'01.8"
ΔT 0.3 s

Eclipse season

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 April–May 1902
April 8
Descending node (new moon)		 April 22
Ascending node (full moon)		 May 7
Descending node (new moon)
Partial solar eclipse
Solar Saros 108		 Total lunar eclipse
Lunar Saros 120		 Partial solar eclipse
Solar Saros 146

Eclipses in 1902

Solar Saros 108

  • Preceded by: Solar eclipse of March 27, 1884

Solar eclipses of 1902–1906

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.[5]

The partial solar eclipses on May 7, 1902 and October 31, 1902 occur in the previous lunar year eclipse set, and the partial solar eclipse on July 21, 1906 occurs in the next lunar year eclipse set.

Solar eclipse series sets from 1902 to 1906
Descending node   Ascending node
Saros Map Gamma Saros Map Gamma
108 April 8, 1902

Partial 		1.5024 113 October 1, 1902
118 March 29, 1903

Annular 		0.8413 123 September 21, 1903

Total 		−0.8967
128 March 17, 1904

Annular 		0.1299 133 September 9, 1904

Total 		−0.1625
138 March 6, 1905

Annular 		−0.5768 143
 August 30, 1905

Total 		0.5708
148 February 23, 1906

Partial 		−1.2479 153 August 20, 1906

Partial 		1.3731

Saros 108

This eclipse is a part of Saros series 108, repeating every 18 years, 11 days, and containing 76 events. The series started with a partial solar eclipse on January 4, 550 AD. It contains annular eclipses from May 13, 766 AD through December 4, 1108; hybrid eclipses from December 15, 1126 through January 28, 1199; and total eclipses from February 7, 1217 through August 11, 1523. The series ends at member 76 as a partial eclipse on April 8, 1902. 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 was produced by member 13 at 3 minutes, 35 seconds on May 13, 766 AD, and the longest duration of totality was produced by member 46 at 5 minutes, 7 seconds on May 5, 1361. All eclipses in this series occur at the Moon’s descending node of orbit.[6]

Series members 71–76 occur between 1801 and 1902:
71 72 73

February 12, 1812
February 23, 1830
March 5, 1848
74 75 76

March 16, 1866
March 27, 1884
April 8, 1902

Metonic series

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 April 8, 1902 and August 31, 1989
April 7–8 January 24–25 November 12 August 31–September 1 June 19–20
108 110 112 114 116

April 8, 1902
August 31, 1913
June 19, 1917
118 120 122 124 126

April 8, 1921
January 24, 1925
November 12, 1928
August 31, 1932
June 19, 1936
128 130 132 134 136

April 7, 1940
January 25, 1944
November 12, 1947
September 1, 1951
June 20, 1955
138 140 142 144 146

April 8, 1959
January 25, 1963
November 12, 1966
August 31, 1970
June 20, 1974
148 150 152 154

April 7, 1978
January 25, 1982
November 12, 1985
August 31, 1989

Tritos series

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 April 8, 1902 (part of Saros 108) and January 5, 1935 (part of Saros 111) are also a part of this series but are not included in the table below.

Series members between 2000 and 2200

July 1, 2000
(Saros 117)
June 1, 2011
(Saros 118)
April 30, 2022
(Saros 119)
March 30, 2033
(Saros 120)
February 28, 2044
(Saros 121)

January 27, 2055
(Saros 122)
December 27, 2065
(Saros 123)
November 26, 2076
(Saros 124)
October 26, 2087
(Saros 125)
September 25, 2098
(Saros 126)

August 26, 2109
(Saros 127)
July 25, 2120
(Saros 128)
June 25, 2131
(Saros 129)
May 25, 2142
(Saros 130)
April 23, 2153
(Saros 131)

March 23, 2164
(Saros 132)
February 21, 2175
(Saros 133)
January 20, 2186
(Saros 134)
December 19, 2196
(Saros 135)

Notes

  1. ^ "April 8, 1902 Partial Solar Eclipse". timeanddate. Retrieved 30 July 2024.
  2. ^ "There was an eclipse of the sun to-day". The Gazette. Cedar Rapids, Iowa. 1902-04-08. p. 3. Retrieved 2023-10-27 – via Newspapers.com.
  3. ^ "City items". The Dayton Herald. Dayton, Ohio. 1902-04-09. p. 10. Retrieved 2023-10-27 – via Newspapers.com.
  4. ^ "Partial Solar Eclipse of 1902 Apr 08". EclipseWise.com. Retrieved 30 July 2024.
  5. ^ 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.
  6. ^ "NASA - Catalog of Solar Eclipses of Saros 108". eclipse.gsfc.nasa.gov.

References

  • Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
    • Besselian elements


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