A total lunar eclipse took place at 0308 UT (GMT) on Thursday, August 17, 1989, the second of two total lunar eclipses in 1989.
| Total Lunar Eclipse August 17, 1989 | |
|---|---|
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 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 | |
The Moon passed through the center of the Earth's shadow.
Visibility
editIt was seen completely over South America, and rising over North America, and setting over Africa, and Europe.
Relations to other lunar eclipses
editEclipses of 1989
edit- A total lunar eclipse on February 20.
- A partial solar eclipse on March 7.
- A total lunar eclipse on August 17.
- A partial solar eclipse on August 31.
Lunar year series
editThis 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
editLunar 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 | |
| 1917 Jul 4 | 1935 Jul 16 | 1953 Jul 26 | |||
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| 1971 Aug 6 | 1989 Aug 17 | 2007 Aug 28 | |||
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| 2025 Sep 7 | 2043 Sep 19 | 2061 Sep 29 | |||
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| 2079 Oct 10 | 2097 Oct 21 | ||||
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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
editIt 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.
| 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 | |
|
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Tritos series
editThe 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.
| 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
editA 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 |
|---|---|
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See also
editNotes
edit- ^ Listing of Eclipses of cycle 128
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 1989 Aug 17 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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