Solar eclipse of September 11, 1988

Last updated
Solar eclipse of September 11, 1988
SE1988Sep11A.png
Map
Type of eclipse
NatureAnnular
Gamma −0.4681
Magnitude 0.9377
Maximum eclipse
Duration417 s (6 min 57 s)
Coordinates 20°00′S94°24′E / 20°S 94.4°E / -20; 94.4
Max. width of band258 km (160 mi)
Times (UTC)
Greatest eclipse4:44:29
References
Saros 144 (15 of 70)
Catalog # (SE5000) 9483

An annular solar eclipse occurred at the Moon's descending node of orbit on Sunday, September 11, 1988, [1] with a magnitude of 0.9377. 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. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring only 12.5 hours after apogee (on September 10, 1988, at 16:10 UTC), the Moon's apparent diameter was smaller. [2]

Contents

Annularity was visible in southeastern Somalia (including the capital city Mogadishu), the Indian Ocean and Macquarie Island of Australia. A partial eclipse was visible for parts of East Africa, the Middle East, South Asia, Southeast Asia, Australia, and New Zealand.

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]

September 11, 1988 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1988 September 11 at 01:46:36.7 UTC
First Umbral External Contact1988 September 11 at 02:56:30.0 UTC
First Central Line1988 September 11 at 02:59:28.7 UTC
First Umbral Internal Contact1988 September 11 at 03:02:28.6 UTC
Greatest Duration1988 September 11 at 04:35:51.5 UTC
Greatest Eclipse1988 September 11 at 04:44:28.7 UTC
Ecliptic Conjunction1988 September 11 at 04:50:04.6 UTC
Equatorial Conjunction1988 September 11 at 05:15:01.8 UTC
Last Umbral Internal Contact1988 September 11 at 06:26:09.7 UTC
Last Central Line1988 September 11 at 06:29:09.8 UTC
Last Umbral External Contact1988 September 11 at 06:32:08.7 UTC
Last Penumbral External Contact1988 September 11 at 07:42:08.2 UTC
September 11, 1988 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude0.93768
Eclipse Obscuration0.87924
Gamma−0.46811
Sun Right Ascension11h18m19.4s
Sun Declination+04°29'02.7"
Sun Semi-Diameter15'53.3"
Sun Equatorial Horizontal Parallax08.7"
Moon Right Ascension11h17m30.7s
Moon Declination+04°06'57.9"
Moon Semi-Diameter14'42.2"
Moon Equatorial Horizontal Parallax0°53'57.6"
ΔT56.1 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–September 1988
August 27
Ascending node (full moon)
 September 11
Descending node (new moon)
Lunar eclipse chart close-1988Aug27.png SE1988Sep11A.png
Partial lunar eclipse
Lunar Saros 118		 Annular solar eclipse
Solar Saros 144

Eclipses in 1988

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 144

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. [4]

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 144

This eclipse is a part of Saros series 144, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on April 11, 1736. It contains annular eclipses from July 7, 1880 through August 27, 2565. There are no hybrid or total eclipses in this set. The series ends at member 70 as a partial eclipse on May 5, 2980. 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 51 at 9 minutes, 52 seconds on December 29, 2168. All eclipses in this series occur at the Moon’s descending node of orbit. [5]

Series members 5–26 occur between 1801 and 2200:
567
SE1808May25P.png
May 25, 1808		 SE1826Jun05P.png
June 5, 1826		 SE1844Jun16P.png
June 16, 1844
8910
SE1862Jun27P.png
June 27, 1862		 SE1880Jul07A.png
July 7, 1880		 SE1898Jul18A.png
July 18, 1898
111213
SE1916Jul30A.png
July 30, 1916 		SE1934Aug10A.png
August 10, 1934 		SE1952Aug20A.png
August 20, 1952
141516
SE1970Aug31A.png
August 31, 1970 		SE1988Sep11A.png
September 11, 1988 		SE2006Sep22A.png
September 22, 2006
171819
SE2024Oct02A.png
October 2, 2024 		SE2042Oct14A.png
October 14, 2042 		SE2060Oct24A.png
October 24, 2060
202122
SE2078Nov04A.png
November 4, 2078 		SE2096Nov15A.png
November 15, 2096 		SE2114Nov27A.png
November 27, 2114
232425
SE2132Dec07A.png
December 7, 2132		 SE2150Dec19A.png
December 19, 2150		 SE2168Dec29A.png
December 29, 2168
26
SE2187Jan09A.png
January 9, 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 September 12, 1931 and July 1, 2011
September 11–12June 30–July 1April 17–19February 4–5November 22–23
114116118120122
SE1931Sep12P.png
September 12, 1931 		SE1935Jun30P.png
June 30, 1935 		SE1939Apr19A.png
April 19, 1939 		SE1943Feb04T.png
February 4, 1943 		SE1946Nov23P.png
November 23, 1946
124126128130132
SE1950Sep12T.png
September 12, 1950 		SE1954Jun30T.png
June 30, 1954 		SE1958Apr19A.png
April 19, 1958 		SE1962Feb05T.png
February 5, 1962 		SE1965Nov23A.png
November 23, 1965
134136138140142
SE1969Sep11A.png
September 11, 1969 		SE1973Jun30T.png
June 30, 1973 		SE1977Apr18A.png
April 18, 1977 		SE1981Feb04A.png
February 4, 1981 		SE1984Nov22T.png
November 22, 1984
144146148150152
SE1988Sep11A.png
September 11, 1988 		SE1992Jun30T.png
June 30, 1992 		SE1996Apr17P.png
April 17, 1996 		SE2000Feb05P.png
February 5, 2000 		SE2003Nov23T.png
November 23, 2003
154156
SE2007Sep11P.png
September 11, 2007 		SE2011Jul01P.png
July 1, 2011

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
SE1803Feb21T.png
February 21, 1803
(Saros 127)		 SE1814Jan21A.gif
January 21, 1814
(Saros 128)		 SE1824Dec20Am.gif
December 20, 1824
(Saros 129)		 SE1835Nov20T.png
November 20, 1835
(Saros 130)		 SE1846Oct20A.png
October 20, 1846
(Saros 131)
SE1857Sep18A.png
September 18, 1857
(Saros 132)		 SE1868Aug18T.png
August 18, 1868
(Saros 133)		 SE1879Jul19A.png
July 19, 1879
(Saros 134)		 SE1890Jun17A.png
June 17, 1890
(Saros 135)		 SE1901May18T.png
May 18, 1901
(Saros 136)
SE1912Apr17H.png
April 17, 1912
(Saros 137)		 SE1923Mar17A.png
March 17, 1923
(Saros 138)		 SE1934Feb14T.png
February 14, 1934
(Saros 139)		 SE1945Jan14A.png
January 14, 1945
(Saros 140)		 SE1955Dec14A.png
December 14, 1955
(Saros 141)
SE1966Nov12T.png
November 12, 1966
(Saros 142)		 SE1977Oct12T.png
October 12, 1977
(Saros 143)		 SE1988Sep11A.png
September 11, 1988
(Saros 144)		 SE1999Aug11T.png
August 11, 1999
(Saros 145)		 SE2010Jul11T.png
July 11, 2010
(Saros 146)
SE2021Jun10A.png
June 10, 2021
(Saros 147)		 SE2032May09A.png
May 9, 2032
(Saros 148)		 SE2043Apr09T.png
April 9, 2043
(Saros 149)		 SE2054Mar09P.png
March 9, 2054
(Saros 150)		 SE2065Feb05P.png
February 5, 2065
(Saros 151)
SE2076Jan06T.png
January 6, 2076
(Saros 152)		 SE2086Dec06P.png
December 6, 2086
(Saros 153)		 SE2097Nov04A.png
November 4, 2097
(Saros 154)		 Saros155 11van71 SE2108Oct05T.jpg
October 5, 2108
(Saros 155)		 Saros156 07van69 SE2119Sep05P.jpg
September 5, 2119
(Saros 156)
Saros157 05van70 SE2130Aug04P.jpg
August 4, 2130
(Saros 157)		 Saros158 05van70 SE2141Jul03P.jpg
July 3, 2141
(Saros 158)		 Saros159 02van70 SE2152Jun03P.jpg
June 3, 2152
(Saros 159)		 Saros161 01van72 SE2174Apr01P.jpg
April 1, 2174
(Saros 161)

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
SE1815Jan10A.png
January 10, 1815
(Saros 138)		 SE1843Dec21T.png
December 21, 1843
(Saros 139)		 SE1872Nov30H.png
November 30, 1872
(Saros 140)
SE1901Nov11A.png
November 11, 1901
(Saros 141)		 SE1930Oct21T.png
October 21, 1930
(Saros 142)		 SE1959Oct02T.png
October 2, 1959
(Saros 143)
SE1988Sep11A.png
September 11, 1988
(Saros 144)		 SE2017Aug21T.png
August 21, 2017
(Saros 145)		 SE2046Aug02T.png
August 2, 2046
(Saros 146)
SE2075Jul13A.png
July 13, 2075
(Saros 147)		 SE2104Jun22T.png
June 22, 2104
(Saros 148)		 SE2133Jun03T.png
June 3, 2133
(Saros 149)
Saros150 25van71 SE2162May14A.jpg
May 14, 2162
(Saros 150)		 SE2191Apr23A.png
April 23, 2191
(Saros 151)

Notes

  1. ↑ "September 11, 1988 Annular Solar Eclipse". timeanddate. Retrieved 9 August 2024.
  2. ↑ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 9 August 2024.
  3. ↑ "Annular Solar Eclipse of 1988 Sep 11". EclipseWise.com. Retrieved 9 August 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 144". eclipse.gsfc.nasa.gov.

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References

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