Jump to content

Solar eclipse of August 20, 1906

From Wikipedia, the free encyclopedia
Solar eclipse of August 20, 1906
Map
Type of eclipse
NaturePartial
Gamma1.3731
Magnitude0.3147
Maximum eclipse
Coordinates70°48′N 66°24′W / 70.8°N 66.4°W / 70.8; -66.4
Times (UTC)
Greatest eclipse1:12:50
References
Saros153 (3 of 70)
Catalog # (SE5000)9295

A partial solar eclipse occurred at the Moon's ascending node of orbit between Sunday, August 19 and Monday, August 20, 1906,[1][2][3] with a magnitude of 0.3147. 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.[4]

A partial eclipse was visible for parts of Northern Russia, Alaska, Western Canada, and the Pacific Northwest.

Eclipse details

[edit]

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.[5]

August 20, 1906 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1906 August 19 at 23:53:11.5 UTC
Equatorial Conjunction 1906 August 20 at 00:33:41.7 UTC
Greatest Eclipse 1906 August 20 at 01:12:49.6 UTC
Ecliptic Conjunction 1906 August 20 at 01:27:22.8 UTC
Last Penumbral External Contact 1906 August 20 at 02:32:40.9 UTC
August 20, 1906 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.31473
Eclipse Obscuration 0.20068
Gamma 1.37306
Sun Right Ascension 09h53m24.2s
Sun Declination +12°49'20.8"
Sun Semi-Diameter 15'48.5"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 09h54m44.1s
Moon Declination +14°05'01.4"
Moon Semi-Diameter 15'32.6"
Moon Equatorial Horizontal Parallax 0°57'02.8"
ΔT 5.8 s

Eclipse season

[edit]

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)
Partial solar eclipse
Solar Saros 115
Total lunar eclipse
Lunar Saros 127
Partial solar eclipse
Solar Saros 153
[edit]

Eclipses in 1906

[edit]

Metonic

[edit]

Tzolkinex

[edit]

Half-Saros

[edit]

Tritos

[edit]

Solar Saros 153

[edit]

Inex

[edit]

Triad

[edit]

Solar eclipses of 1902–1906

[edit]

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.[6]

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 153

[edit]

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.[7]

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

[edit]

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.

24 eclipse events between March 25, 1819 and August 20, 1906
March 25–26 January 11–12 October 30–31 August 18–20 June 6–7
107 109 111 113 115

March 25, 1819

January 12, 1823

October 31, 1826

August 18, 1830

June 7, 1834
117 119 121 123 125

March 25, 1838

January 11, 1842

October 30, 1845

August 18, 1849

June 6, 1853
127 129 131 133 135

March 25, 1857

January 11, 1861

October 30, 1864

August 18, 1868

June 6, 1872
137 139 141 143 145

March 25, 1876

January 11, 1880

October 30, 1883

August 19, 1887

June 6, 1891
147 149 151 153

March 26, 1895

January 11, 1899

October 31, 1902

August 20, 1906

Tritos series

[edit]

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 1928

May 25, 1808
(Saros 144)

April 24, 1819
(Saros 145)

March 24, 1830
(Saros 146)

February 21, 1841
(Saros 147)

January 21, 1852
(Saros 148)

December 21, 1862
(Saros 149)

November 20, 1873
(Saros 150)

October 19, 1884
(Saros 151)

September 18, 1895
(Saros 152)

August 20, 1906
(Saros 153)

July 19, 1917
(Saros 154)

June 17, 1928
(Saros 155)

Inex series

[edit]

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 1964

October 19, 1819
(Saros 150)

September 27, 1848
(Saros 151)

September 7, 1877
(Saros 152)

August 20, 1906
(Saros 153)

July 30, 1935
(Saros 154)

July 9, 1964
(Saros 155)

Notes

[edit]
  1. ^ "August 19–20, 1906 Partial Solar Eclipse". timeanddate. Retrieved 31 July 2024.
  2. ^ "DIDN'T SEE ANY ECLIPSE OF THE SUN". The Eugene Guard. Eugene, Oregon. 1906-08-20. p. 1. Retrieved 2023-11-01 – via Newspapers.com.
  3. ^ "ECLIPSE DID NOT AFFECT THE RAYS OF OLD SOL IN OMAHA". Omaha World-Herald. Omaha, Nebraska. 1906-08-20. p. 3. Retrieved 2023-11-01 – via Newspapers.com.
  4. ^ "What Is a Solar Eclipse?". www.timeanddate.com. Retrieved 2020-04-24.
  5. ^ "Partial Solar Eclipse of 1906 Aug 20". EclipseWise.com. Retrieved 31 July 2024.
  6. ^ 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.
  7. ^ "NASA - Catalog of Solar Eclipses of Saros 153". eclipse.gsfc.nasa.gov.

References

[edit]


[edit]