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Solar eclipse of March 7, 1989

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Solar eclipse of March 7, 1989
Map
Type of eclipse
NaturePartial
Gamma1.0981
Magnitude0.8268
Maximum eclipse
Coordinates61°12′N 169°48′W / 61.2°N 169.8°W / 61.2; -169.8
Times (UTC)
Greatest eclipse18:08:41
References
Saros149 (19 of 71)
Catalog # (SE5000)9484

A partial solar eclipse occurred at the Moon's ascending node of orbit on Tuesday, March 7, 1989,[1] with a magnitude of 0.8268. 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 Hawaii, Alaska, Canada, the western and central United States, northwest Mexico, and Greenland.

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]

March 7, 1989 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1989 March 07 at 16:17:48.4 UTC
Greatest Eclipse 1989 March 07 at 18:08:40.6 UTC
Ecliptic Conjunction 1989 March 07 at 18:19:36.5 UTC
Equatorial Conjunction 1989 March 07 at 19:09:59.8 UTC
Last Penumbral External Contact 1989 March 07 at 19:59:06.7 UTC
March 7, 1989 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.82679
Eclipse Obscuration 0.78906
Gamma 1.09815
Sun Right Ascension 23h12m43.3s
Sun Declination -05°04'32.2"
Sun Semi-Diameter 16'06.8"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 23h10m35.2s
Moon Declination -04°05'29.6"
Moon Semi-Diameter 16'41.7"
Moon Equatorial Horizontal Parallax 1°01'16.5"
ΔT 56.4 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 February–March 1989
February 20
Descending node (full moon)
March 7
Ascending node (new moon)
Total lunar eclipse
Lunar Saros 123
Partial solar eclipse
Solar Saros 149
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Eclipses in 1989

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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 149

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Inex

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Triad

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Solar eclipses of 1986–1989

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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]

Solar eclipse series sets from 1986 to 1989
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
119 April 9, 1986

Partial
−1.0822 124 October 3, 1986

Hybrid
0.9931
129 March 29, 1987

Hybrid
−0.3053 134 September 23, 1987

Annular
0.2787
139 March 18, 1988

Total
0.4188 144 September 11, 1988

Annular
−0.4681
149 March 7, 1989

Partial
1.0981 154 August 31, 1989

Partial
−1.1928

Saros 149

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This eclipse is a part of Saros series 149, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on August 21, 1664. It contains total eclipses from April 9, 2043 through October 2, 2331; hybrid eclipses from October 13, 2349 through November 3, 2385; and annular eclipses from November 15, 2403 through July 13, 2800. The series ends at member 71 as a partial eclipse on September 28, 2926. 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 will be produced by member 31 at 4 minutes, 10 seconds on July 17, 2205, and the longest duration of annularity will be produced by member 62 at 5 minutes, 6 seconds on June 21, 2764. All eclipses in this series occur at the Moon’s ascending node of orbit.[4]

Series members 9–30 occur between 1801 and 2200:
9 10 11

November 18, 1808

November 29, 1826

December 9, 1844
12 13 14

December 21, 1862

December 31, 1880

January 11, 1899
15 16 17

January 23, 1917

February 3, 1935

February 14, 1953
18 19 20

February 25, 1971

March 7, 1989

March 19, 2007
21 22 23

March 29, 2025

April 9, 2043

April 20, 2061
24 25 26

May 1, 2079

May 11, 2097

May 24, 2115
27 28 29

June 3, 2133

June 14, 2151

June 25, 2169
30

July 6, 2187

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 ascending node.

22 eclipse events between December 24, 1916 and July 31, 2000
December 24–25 October 12 July 31–August 1 May 19–20 March 7
111 113 115 117 119

December 24, 1916

July 31, 1924

May 19, 1928

March 7, 1932
121 123 125 127 129

December 25, 1935

October 12, 1939

August 1, 1943

May 20, 1947

March 7, 1951
131 133 135 137 139

December 25, 1954

October 12, 1958

July 31, 1962

May 20, 1966

March 7, 1970
141 143 145 147 149

December 24, 1973

October 12, 1977

July 31, 1981

May 19, 1985

March 7, 1989
151 153 155

December 24, 1992

October 12, 1996

July 31, 2000

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 2087

August 17, 1803
(Saros 132)

July 17, 1814
(Saros 133)

June 16, 1825
(Saros 134)

May 15, 1836
(Saros 135)

April 15, 1847
(Saros 136)

March 15, 1858
(Saros 137)

February 11, 1869
(Saros 138)

January 11, 1880
(Saros 139)

December 12, 1890
(Saros 140)

November 11, 1901
(Saros 141)

October 10, 1912
(Saros 142)

September 10, 1923
(Saros 143)

August 10, 1934
(Saros 144)

July 9, 1945
(Saros 145)

June 8, 1956
(Saros 146)

May 9, 1967
(Saros 147)

April 7, 1978
(Saros 148)

March 7, 1989
(Saros 149)

February 5, 2000
(Saros 150)

January 4, 2011
(Saros 151)

December 4, 2021
(Saros 152)

November 3, 2032
(Saros 153)

October 3, 2043
(Saros 154)

September 2, 2054
(Saros 155)

August 2, 2065
(Saros 156)

July 1, 2076
(Saros 157)

June 1, 2087
(Saros 158)

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

July 6, 1815
(Saros 143)

June 16, 1844
(Saros 144)

May 26, 1873
(Saros 145)

May 7, 1902
(Saros 146)

April 18, 1931
(Saros 147)

March 27, 1960
(Saros 148)

March 7, 1989
(Saros 149)

February 15, 2018
(Saros 150)

January 26, 2047
(Saros 151)

January 6, 2076
(Saros 152)

December 17, 2104
(Saros 153)

November 26, 2133
(Saros 154)

November 7, 2162
(Saros 155)

October 18, 2191
(Saros 156)

References

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  1. ^ "March 7, 1989 Partial Solar Eclipse". timeanddate. Retrieved 9 August 2024.
  2. ^ "Partial Solar Eclipse of 1989 Mar 07". EclipseWise.com. Retrieved 9 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 149". eclipse.gsfc.nasa.gov.
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