Visibility
It was completely visible over Europe, Africa, Asia and Australia, seen rising over Europe, Africa on the evening of Friday, October 17, 1986, and setting over Asia, Australia on the morning of Saturday, October 18, 1986.
| Total eclipse | |||||||||||||||||
| Date | 17 October 1986 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.31887 | ||||||||||||||||
| Magnitude | 1.24545 | ||||||||||||||||
| Saros cycle | 136 (18 of 72) | ||||||||||||||||
| Totality | 73 minutes, 41 seconds | ||||||||||||||||
| Partiality | 216 minutes, 49.5 seconds | ||||||||||||||||
| Penumbral | 353 minutes, 17.4 seconds | ||||||||||||||||
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A total lunar eclipse took place on Friday, October 17, 1986, the second of two total lunar eclipses in 1986, the first being on April 24, 1986. The Moon was plunged into darkness for 1 hour, 13 minutes and 41 seconds, in a deep total eclipse which saw the Moon 24.545% of its diameter inside the Earth's umbral shadow. The visual effect of this depends on the state of the Earth's atmosphere, but the Moon may have been stained a deep red colour. The partial eclipse lasted for 3 hours, 36 minutes and 49.5 seconds in total. The Moon was 5.4 days before apogee (Apogee on Thursday, October 23, 1986), making it 3.3% smaller than average. [1]
It was completely visible over Europe, Africa, Asia and Australia, seen rising over Europe, Africa on the evening of Friday, October 17, 1986, and setting over Asia, Australia on the morning of Saturday, October 18, 1986.
| Lunar eclipse series sets from 1984–1987 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | Gamma | |
| 111 | 1984 May 15  | Penumbral | 1.11308 | 116 | 1984 Nov 08  | Penumbral | −1.08998 | |
| 121 | 1985 May 04  | Total | 0.35197 | 126 | 1985 Oct 28  | Total | −0.40218 | |
| 131 | 1986 Apr 24  | Total | −0.36826 | 136 | 1986 Oct 17  | Total | 0.31887 | |
| 141 | 1987 Apr 14  | Penumbral | −1.13641 | 146 | 1987 Oct 07  | Penumbral | 1.01890 | |
| Last set | 1984 Jun 13 | Last set | 1983 Dec 20 | |||||
| Next set | 1988 Mar 03 | Next set | 1988 Aug 27 | |||||
This eclipse is the third of four Metonic cycle lunar eclipses on the same date, October 17–18, each 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 | |
| 111 | 1948 Apr 23 | Partial | 116 | 1948 Oct 18 | Penumbral | |
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| 121 | 1967 Apr 24 | Total | 126 | 1967 Oct 18 | Total | |
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| 131 | 1986 Apr 24 | Total | 136 | 1986 Oct 17 | Total | |
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| 141 | 2005 Apr 24 | Penumbral | 146 | 2005 Oct 17 | Partial | |
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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 total solar eclipses of Solar Saros 143.
| October 12, 1977 | October 24, 1995 |
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An annular solar eclipse occurred at the Moon's ascending node of the orbit on August 10, 1980, centred over the Pacific Ocean. 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. Annularity was visible in Tabuaeran of Kiribati, Peru, Bolivia, northern Paraguay and Brazil. Occurring 5 days before apogee, the Moon's apparent diameter was smaller. At greatest eclipse, the Sun was 79 degrees above horizon.
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A total lunar eclipse will occur on Wednesday, June 9, 2123, with maximum eclipse at 05:06 UTC. A dramatic total eclipse lasting 106 minutes and 6 seconds will plunge the full Moon into deep darkness, as it passes right through the centre of the Earth's umbral shadow. While the visual effect of a total eclipse is variable, the Moon may be stained a deep orange or red colour at maximum eclipse. This will be a great spectacle for everyone who sees it. The partial eclipse will last for 3 hours and 56 minutes in total. The penumbral eclipse lasts for 6 hours and 14 minutes. Maximum eclipse is at 05:06:28 UT. This will be the longest Total Lunar Eclipse since 16 July 2000, and the longest one until 12 May 2264 and 27 July 3107, though the eclipse on June 19, 2141 will be nearly identical in all aspects. This will also be the longest of the 22nd century and the second longest of the 3rd millennium. The eclipse on June 19, 2141 will be the second longest of the 22nd century and the third longest of the third millennium.
