Solar eclipse of July 21, 1906

Last updated
Solar eclipse of July 21, 1906
SE1906Jul21P.png
Map
Type of eclipse
NaturePartial
Gamma −1.3637
Magnitude 0.3355
Maximum eclipse
Coordinates 68°36′S33°18′W / 68.6°S 33.3°W / -68.6; -33.3
Times (UTC)
Greatest eclipse13:14:19
References
Saros 115 (70 of 72)
Catalog # (SE5000) 9296

A partial solar eclipse occurred at the Moon's ascending node of orbit on Saturday, July 21, 1906, [1] [2] with a magnitude of 0.3355. 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.

Contents

A partial eclipse was visible for parts of Argentina and Chile.

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. [3]

July 21, 1906 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1906 July 21 at 11:48:29.5 UTC
Ecliptic Conjunction1906 July 21 at 12:59:01.1 UTC
Greatest Eclipse1906 July 21 at 13:14:19.0 UTC
Equatorial Conjunction1906 July 21 at 13:30:23.7 UTC
Last Penumbral External Contact1906 July 21 at 14:39:56.8 UTC
July 21, 1906 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude0.33551
Eclipse Obscuration0.21869
Gamma−1.36368
Sun Right Ascension07h59m42.4s
Sun Declination+20°36'09.7"
Sun Semi-Diameter15'44.5"
Sun Equatorial Horizontal Parallax08.7"
Moon Right Ascension07h59m09.6s
Moon Declination+19°20'59.5"
Moon Semi-Diameter15'08.2"
Moon Equatorial Horizontal Parallax0°55'33.2"
ΔT5.8 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 July−August 1906
July 21
Ascending node (new moon)		 August 4
Descending node (full moon)		 August 20
Ascending node (new moon)
SE1906Jul21P.png Lunar eclipse chart close-1906Aug04.png SE1906Aug20P.png
Partial solar eclipse
Solar Saros 115		 Total lunar eclipse
Lunar Saros 127		 Partial solar eclipse
Solar Saros 153

Eclipses in 1906

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 115

Inex

Triad

Solar eclipses of 1906–1909

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 February 23, 1906 and August 20, 1906 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 1906 to 1909
Ascending node Descending node
SarosMapGammaSarosMapGamma
115 July 21, 1906
SE1906Jul21P.png
Partial		−1.3637120 January 14, 1907
SE1907Jan14T.png
Total		0.8628
125 July 10, 1907
SE1907Jul10A.png
Annular		−0.6313130 January 3, 1908
SE1908Jan03T.png
Total		0.1934
135 June 28, 1908
SE1908Jun28A.png
Annular		0.1389140 December 23, 1908
SE1908Dec23H.png
Hybrid		−0.4985
145 June 17, 1909
SE1909Jun17H.png
Hybrid		0.8957150 December 12, 1909
SE1909Dec12P.png
Partial		−1.2456

Saros 115

This eclipse is a part of Saros series 115, repeating every 18 years, 11 days, and containing 72 events. The series started with a partial solar eclipse on June 21, 662 AD. It contains total eclipses from October 7, 842 AD through November 2, 1491; hybrid eclipses from November 12, 1509 through December 15, 1563; and annular eclipses from December 25, 1581 through May 27, 1816. The series ends at member 72 as a partial eclipse on August 12, 1942. 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 36 at 6 minutes, 24 seconds on July 5, 1293, and the longest duration of annularity was produced by member 65 at 1 minutes, 54 seconds on May 27, 1816. All eclipses in this series occur at the Moon’s ascending node of orbit. [5]

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 ascending node.

22 eclipse events between December 13, 1898 and July 20, 1982
December 13–14October 1–2July 20–21May 9February 24–25
111113115117119
SE1898Dec13P.gif
December 13, 1898		 SE1906Jul21P.png
July 21, 1906 		SE1910May09T.png
May 9, 1910 		SE1914Feb25A.png
February 25, 1914
121123125127129
SE1917Dec14A.png
December 14, 1917 		SE1921Oct01T.png
October 1, 1921 		SE1925Jul20A.png
July 20, 1925 		SE1929May09T.png
May 9, 1929 		SE1933Feb24A.png
February 24, 1933
131133135137139
SE1936Dec13A.png
December 13, 1936 		SE1940Oct01T.png
October 1, 1940 		SE1944Jul20A.png
July 20, 1944 		SE1948May09A.png
May 9, 1948 		SE1952Feb25T.png
February 25, 1952
141143145147149
SE1955Dec14A.png
December 14, 1955 		SE1959Oct02T.png
October 2, 1959 		SE1963Jul20T.png
July 20, 1963 		SE1967May09P.png
May 9, 1967 		SE1971Feb25P.png
February 25, 1971
151153155
SE1974Dec13P.png
December 13, 1974 		SE1978Oct02P.png
October 2, 1978 		SE1982Jul20P.png
July 20, 1982

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.

Series members between 1801 and 2200
SE1819Mar25P.gif
March 25, 1819
(Saros 107)		 SE1830Feb23P.gif
February 23, 1830
(Saros 108)		 SE1841Jan22P.gif
January 22, 1841
(Saros 109)		 SE1862Nov21P.gif
November 21, 1862
(Saros 111)
SE1895Aug20P.gif
August 20, 1895
(Saros 114)		 SE1906Jul21P.png
July 21, 1906
(Saros 115)		 SE1917Jun19P.png
June 19, 1917
(Saros 116)
SE1928May19T.png
May 19, 1928
(Saros 117)		 SE1939Apr19A.png
April 19, 1939
(Saros 118)		 SE1950Mar18A.png
March 18, 1950
(Saros 119)		 SE1961Feb15T.png
February 15, 1961
(Saros 120)		 SE1972Jan16A.png
January 16, 1972
(Saros 121)
SE1982Dec15P.png
December 15, 1982
(Saros 122)		 SE1993Nov13P.png
November 13, 1993
(Saros 123)		 SE2004Oct14P.png
October 14, 2004
(Saros 124)		 SE2015Sep13P.png
September 13, 2015
(Saros 125)		 SE2026Aug12T.png
August 12, 2026
(Saros 126)
SE2037Jul13T.png
July 13, 2037
(Saros 127)		 SE2048Jun11A.png
June 11, 2048
(Saros 128)		 SE2059May11T.png
May 11, 2059
(Saros 129)		 SE2070Apr11T.png
April 11, 2070
(Saros 130)		 SE2081Mar10A.png
March 10, 2081
(Saros 131)
SE2092Feb07A.png
February 7, 2092
(Saros 132)		 SE2103Jan08T.png
January 8, 2103
(Saros 133)		 SE2113Dec08A.png
December 8, 2113
(Saros 134)		 SE2124Nov06A.png
November 6, 2124
(Saros 135)		 SE2135Oct07T.png
October 7, 2135
(Saros 136)
SE2146Sep06A.png
September 6, 2146
(Saros 137)		 SE2157Aug05A.png
August 5, 2157
(Saros 138)		 SE2168Jul05T.png
July 5, 2168
(Saros 139)		 SE2179Jun05A.png
June 5, 2179
(Saros 140)		 SE2190May04A.png
May 4, 2190
(Saros 141)

Inex series

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
SE1819Sep19Pe.gif
September 19, 1819
(Saros 112)		 SE1848Aug28P.gif
August 28, 1848
(Saros 113)		 SE1877Aug09P.gif
August 9, 1877
(Saros 114)
SE1906Jul21P.png
July 21, 1906
(Saros 115)		 SE1935Jun30P.png
June 30, 1935
(Saros 116)		 SE1964Jun10P.png
June 10, 1964
(Saros 117)
SE1993May21P.png
May 21, 1993
(Saros 118)		 SE2022Apr30P.png
April 30, 2022
(Saros 119)		 SE2051Apr11P.png
April 11, 2051
(Saros 120)
SE2080Mar21P.png
March 21, 2080
(Saros 121)		 Saros122 63van70 SE2109Mar01P.jpg
March 1, 2109
(Saros 122)		 Saros123 60van70 SE2138Feb09P.jpg
February 9, 2138
(Saros 123)
Saros124 63van73 SE2167Jan21P.jpg
January 21, 2167
(Saros 124)		 Saros125 64van73 SE2195Dec31P.jpg
December 31, 2195
(Saros 125)

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References

  1. ↑ "July 21, 1906 Partial Solar Eclipse". timeanddate. Retrieved 31 July 2024.
  2. ↑ "Phenomenon in Antartic Not Reproduced in Iowa by Long Shot". Sioux City Journal. Sioux City, Iowa. 1906-07-22. p. 6. Retrieved 2023-11-01– via Newspapers.com.
  3. ↑ "Partial Solar Eclipse of 1906 Jul 21". EclipseWise.com. Retrieved 31 July 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 115". eclipse.gsfc.nasa.gov.
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