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August 1989 lunar eclipse

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Total Lunar Eclipse
August 17, 1989
Photo of the lunar eclipse taken from Marden, Sussex, England

The Moon passes west to east (right to left) across the Earth's umbral shadow, shown in hourly intervals.
Series 128 (39 of 71)
Duration (hr:mn:sc)
Totality 1:35:48
Partial 3:34:17
Penumbral 5:27:31
Contacts
P1 0:24:22UTC
U1 1:21:03
U2 2:20:17
Greatest 3:09:07
U3 3:56:05
U4 4:55:20
P4 5:51:54

The eclipse occurs in Capricornus

A total lunar eclipse took place at 0308 UT (GMT) on Thursday, August 17, 1989, the second of two total lunar eclipses in 1989.

The Moon passed through the center of the Earth's shadow.

Visibility

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It was seen completely over South America, and rising over North America, and setting over Africa, and Europe.

Relations to other lunar eclipses

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Eclipses of 1989

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Lunar year series

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This eclipse is the second of four lunar year eclipses occurring at the Moon's ascending node.

The lunar year series repeats after 12 lunations or 354 days (Shifting back about 10 days in sequential years). Because of the date shift, the Earth's shadow will be about 11 degrees west in sequential events.

Lunar eclipse series sets from 1988–1991
Descending node   Ascending node
Saros Date
viewing
Type
chart
Gamma Saros Date
viewing
Type
chart
Gamma
113 1988 Mar 03
Penumbral
0.98855 118 1988 Aug 27
Partial
−0.86816
123 1989 Feb 20
Total
0.29347 128 1989 Aug 17
Total
−0.14905
133 1990 Feb 09
Total
−0.41481 138 1990 Aug 06
Partial
0.63741
143 1991 Jan 30
Penumbral
−1.07522 148 1991 Jul 26
Penumbral
1.43698
Last set 1987 Apr 14 Last set 1987 Oct 07
Next set 1991 Dec 21 Next set 1991 Jun 27

Saros series

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Lunar saros series 128, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 57 umbral eclipses (42 partial lunar eclipses and 15 total lunar eclipses). Solar Saros 135 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.

Greatest First

The greatest eclipse of the series occurred on 1953 Jul 26, lasting 100.7 minutes.[1]
Penumbral Partial Total Central
1304 Jun 18 1430 Sep 2 1845 May 21 1899 Jun 23
Last
Central Total Partial Penumbral
2007 Aug 28 2097 May 21 2440 May 17 2566 Aug 2
1901–2100
1917 Jul 4 1935 Jul 16 1953 Jul 26
1971 Aug 6 1989 Aug 17 2007 Aug 28
2025 Sep 7 2043 Sep 19 2061 Sep 29
2079 Oct 10 2097 Oct 21

Lunar Saros 128 contains 15 total lunar eclipses between 1845 and 2097 (in years 1845, 1863, 1881, 1899, 1917, 1935, 1953, 1971, 1989, 2007, 2025, 2043, 2061, 2079 and 2097). Solar Saros 135 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.

Metonic series

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It is the third of five Metonic cycle eclipses, each being separated by 19 years: The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.

Metonic lunar eclipse sets 1951–2027
Descending node   Ascending node
Saros Date Type Saros Date Type
103 1951 Feb 21.88 Penumbral 108 1951 Aug 17.13 Penumbral
113 1970 Feb 21.35 Partial 118 1970 Aug 17.14 Partial
123 1989 Feb 20.64 Total 128 1989 Aug 17.13 Total
133 2008 Feb 21.14 Total 138 2008 Aug 16.88 Partial
143 2027 Feb 20.96 Penumbral 148 2027 Aug 17.30 Penumbral

Tritos series

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The tritos series repeats 31 days short of 11 years at alternating nodes. Sequential events have incremental Saros cycle indices.

This series produces 23 total eclipses between June 22, 1880 and August 9, 2120.

Tritos eclipse series (subset 1901–2100)
Ascending node   Descending node
Saros Date
Viewing
Type
chart
Saros Date
Viewing
Type
chart
120 1902 Apr 22
Total
121 1913 Mar 22
Total
122 1924 Feb 20
Total
123 1935 Jan 19
Total
124 1945 Dec 19
Total
125 1956 Nov 18
Total
126 1967 Oct 18
Total
127 1978 Sep 16
Total
128 1989 Aug 17
Total
129 2000 Jul 16
Total
130 2011 Jun 15
Total
131 2022 May 16
Total
132 2033 Apr 14
Total
133 2044 Mar 13
Total
134 2055 Feb 11
Total
135 2066 Jan 11
Total
136 2076 Dec 10
Total
137 2087 Nov 10
Total
138 2098 Oct 10
Total

Half-Saros cycle

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A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[2] This lunar eclipse is related to two annular solar eclipses of Solar Saros 135.

August 10, 1980 August 22, 1998

See also

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Notes

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  1. ^ Listing of Eclipses of cycle 128
  2. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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