Solar eclipse of August 31, 1989

Last updated
Solar eclipse of August 31, 1989
SE1989Aug31P.png
Map
Type of eclipse
NaturePartial
Gamma −1.1928
Magnitude 0.6344
Maximum eclipse
Coordinates 61°18′S23°36′E / 61.3°S 23.6°E / -61.3; 23.6
Times (UTC)
Greatest eclipse5:31:47
References
Saros 154 (5 of 71)
Catalog # (SE5000) 9485

A partial solar eclipse occurred at the Moon's descending node of orbit on Thursday, August 31, 1989, [1] with a magnitude of 0.6344. 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 Southern Africa and Antarctica.

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. [2]

August 31, 1989 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1989 August 31 at 03:34:34.1 UTC
Greatest Eclipse1989 August 31 at 05:31:46.6 UTC
Ecliptic Conjunction1989 August 31 at 05:45:27.9 UTC
Equatorial Conjunction1989 August 31 at 06:44:00.9 UTC
Last Penumbral External Contact1989 August 31 at 07:28:34.9 UTC
August 31, 1989 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude0.63443
Eclipse Obscuration0.53492
Gamma−1.19279
Sun Right Ascension10h37m52.8s
Sun Declination+08°38'48.2"
Sun Semi-Diameter15'50.7"
Sun Equatorial Horizontal Parallax08.7"
Moon Right Ascension10h35m50.9s
Moon Declination+07°40'48.2"
Moon Semi-Diameter14'58.4"
Moon Equatorial Horizontal Parallax0°54'57.0"
ΔT56.7 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.

Eclipse season of August 1989
August 17
Ascending node (full moon)
 August 31
Descending node (new moon)
Lunar eclipse chart close-1989Aug17.png SE1989Aug31P.png
Total lunar eclipse
Lunar Saros 128		 Partial solar eclipse
Solar Saros 154

Eclipses in 1989

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 154

Inex

Triad

Solar eclipses of 1986–1989

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
SarosMapGammaSarosMapGamma
119 April 9, 1986
SE1986Apr09P.png
Partial		−1.0822124 October 3, 1986
SE1986Oct03H.png
Hybrid		0.9931
129 March 29, 1987
SE1987Mar29H.png
Hybrid		−0.3053134 September 23, 1987
SE1987Sep23A.png
Annular		0.2787
139 March 18, 1988
SE1988Mar18T.png
Total		0.4188144 September 11, 1988
SE1988Sep11A.png
Annular		−0.4681
149 March 7, 1989
SE1989Mar07P.png
Partial		1.0981154 August 31, 1989
SE1989Aug31P.png
Partial		−1.1928

Saros 154

This eclipse is a part of Saros series 154, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on July 19, 1917. It contains annular eclipses from October 3, 2043 through March 27, 2332; hybrid eclipses from April 7, 2350 through April 29, 2386; and total eclipses from May 9, 2404 through May 29, 3035. The series ends at member 71 as a partial eclipse on August 25, 3179. 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 9 at 3 minutes, 41 seconds on October 13, 2061, and the longest duration of totality will be produced by member 35 at 4 minutes, 50 seconds on July 25, 2530. All eclipses in this series occur at the Moon’s descending node of orbit. [4]

Series members 1–16 occur between 1917 and 2200:
123
SE1917Jul19P.png
July 19, 1917 		SE1935Jul30P.png
July 30, 1935 		SE1953Aug09P.png
August 9, 1953
456
SE1971Aug20P.png
August 20, 1971 		SE1989Aug31P.png
August 31, 1989 		SE2007Sep11P.png
September 11, 2007
789
SE2025Sep21P.png
September 21, 2025 		SE2043Oct03A.png
October 3, 2043 		SE2061Oct13A.png
October 13, 2061
101112
SE2079Oct24A.png
October 24, 2079 		SE2097Nov04A.png
November 4, 2097 		SE2115Nov16A.png
November 16, 2115
131415
Saros154 13van71 SE2133Nov26A.jpg
November 26, 2133		 Saros154 14van71 SE2151Dec08A.jpg
December 8, 2151		 Saros154 15van71 SE2169Dec18A.jpg
December 18, 2169
16
Saros154 16van71 SE2187Dec29A.jpg
December 29, 2187

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 7–8January 24–25November 12August 31–September 1June 19–20
108110112114116
SE1902Apr08P.png
April 8, 1902 		SE1913Aug31P.png
August 31, 1913 		SE1917Jun19P.png
June 19, 1917
118120122124126
SE1921Apr08A.png
April 8, 1921 		SE1925Jan24T.png
January 24, 1925 		SE1928Nov12P.png
November 12, 1928 		SE1932Aug31T.png
August 31, 1932 		SE1936Jun19T.png
June 19, 1936
128130132134136
SE1940Apr07A.png
April 7, 1940 		SE1944Jan25T.png
January 25, 1944 		SE1947Nov12A.png
November 12, 1947 		SE1951Sep01A.png
September 1, 1951 		SE1955Jun20T.png
June 20, 1955
138140142144146
SE1959Apr08A.png
April 8, 1959 		SE1963Jan25A.png
January 25, 1963 		SE1966Nov12T.png
November 12, 1966 		SE1970Aug31A.png
August 31, 1970 		SE1974Jun20T.png
June 20, 1974
148150152154
SE1978Apr07P.png
April 7, 1978 		SE1982Jan25P.png
January 25, 1982 		SE1985Nov12T.png
November 12, 1985 		SE1989Aug31P.png
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 eclipse on October 24, 2098 (part of Saros 164) is also a part of this series but is not included in the table below.

Series members between 1801 and 2011
SE1804Feb11H.png
February 11, 1804
(Saros 137)		 SE1815Jan10A.png
January 10, 1815
(Saros 138)		 SE1825Dec09H.png
December 9, 1825
(Saros 139)		 SE1836Nov09T.png
November 9, 1836
(Saros 140)		 SE1847Oct09A.png
October 9, 1847
(Saros 141)
SE1858Sep07T.png
September 7, 1858
(Saros 142)		 SE1869Aug07T.png
August 7, 1869
(Saros 143)		 SE1880Jul07A.png
July 7, 1880
(Saros 144)		 SE1891Jun06A.png
June 6, 1891
(Saros 145)		 SE1902May07P.png
May 7, 1902
(Saros 146)
SE1913Apr06P.png
April 6, 1913
(Saros 147)		 SE1924Mar05P.png
March 5, 1924
(Saros 148)		 SE1935Feb03P.png
February 3, 1935
(Saros 149)		 SE1946Jan03P.png
January 3, 1946
(Saros 150)		 SE1956Dec02P.png
December 2, 1956
(Saros 151)
SE1967Nov02T.png
November 2, 1967
(Saros 152)		 SE1978Oct02P.png
October 2, 1978
(Saros 153)		 SE1989Aug31P.png
August 31, 1989
(Saros 154)		 SE2000Jul31P.png
July 31, 2000
(Saros 155)		 SE2011Jul01P.png
July 1, 2011
(Saros 156)

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
SE1815Dec30P.gif
December 30, 1815
(Saros 148)		 SE1844Dec09P.gif
December 9, 1844
(Saros 149)		 SE1873Nov20P.png
November 20, 1873
(Saros 150)
SE1902Oct31P.png
October 31, 1902
(Saros 151)		 SE1931Oct11P.png
October 11, 1931
(Saros 152)		 SE1960Sep20P.png
September 20, 1960
(Saros 153)
SE1989Aug31P.png
August 31, 1989
(Saros 154)		 SE2018Aug11P.png
August 11, 2018
(Saros 155)		 SE2047Jul22P.png
July 22, 2047
(Saros 156)
SE2076Jul01P.png
July 1, 2076
(Saros 157)		 Saros158 03van70 SE2105Jun12P.jpg
June 12, 2105
(Saros 158)		 Saros159 01van70 SE2134May23P.jpg
May 23, 2134
(Saros 159)
Saros161 02van72 SE2192Apr12P.jpg
April 12, 2192
(Saros 161)

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References

  1. ↑ "August 31, 1989 Partial Solar Eclipse". timeanddate. Retrieved 9 August 2024.
  2. ↑ "Partial Solar Eclipse of 1989 Aug 31". 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 154". eclipse.gsfc.nasa.gov.
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