April 1986 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, April 24, 1986,[1] with an umbral magnitude of 1.2022. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring about 1.25 days before perigee (on April 25, 1986, at 18:40 UTC), the Moon's apparent diameter was larger.[2]
This lunar eclipse was the third of a tetrad, with four total lunar eclipses in series, the others being on May 4, 1985; October 28, 1985; and October 17, 1986.
Visibility
The eclipse was completely visible over Australia, east and northeast Asia, Antarctica, and the western and central Pacific Ocean, seen rising over much of Asia and setting over North America and western South America.[3]
| File:Lunar eclipse from moon-1986Apr24.png File:Lunar eclipse chart close-1986Apr24.png |
Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 2.16203 |
| Umbral Magnitude | 1.20217 |
| Gamma | −0.36826 |
| Sun Right Ascension | 02h07m09.8s |
| Sun Declination | +12°52'05.8" |
| Sun Semi-Diameter | 15'54.1" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 14h06m30.3s |
| Moon Declination | -13°12'18.9" |
| Moon Semi-Diameter | 16'34.0" |
| Moon Equatorial Horizontal Parallax | 1°00'48.0" |
| ΔT | 55.0 s |
Eclipse season
Script error: No such module "Labelled list hatnote". 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.
| April 9 Ascending node (new moon) |
April 24 Descending node (full moon) |
|---|---|
| File:SE1986Apr09P.png | File:Lunar eclipse chart close-1986Apr24.png |
| Partial solar eclipse Solar Saros 119 |
Total lunar eclipse Lunar Saros 131 |
Related eclipses
Eclipses in 1986
- A partial solar eclipse on April 9.
- A total lunar eclipse on April 24.
- A hybrid solar eclipse on October 3.
- A total lunar eclipse on October 17.
Metonic
- Preceded by: Lunar eclipse of July 6, 1982
- Followed by: Lunar eclipse of February 9, 1990
Tzolkinex
- Preceded by: Lunar eclipse of March 13, 1979
- Followed by: Lunar eclipse of June 4, 1993
Half-Saros
- Preceded by: Solar eclipse of April 18, 1977
- Followed by: Solar eclipse of April 29, 1995
Tritos
- Preceded by: Lunar eclipse of May 25, 1975
- Followed by: Lunar eclipse of March 24, 1997
Lunar Saros 131
- Preceded by: Lunar eclipse of April 13, 1968
- Followed by: Lunar eclipse of May 4, 2004
Inex
- Preceded by: Lunar eclipse of May 13, 1957
- Followed by: Lunar eclipse of April 4, 2015
Triad
- Preceded by: Lunar eclipse of June 23, 1899
- Followed by: Lunar eclipse of February 22, 2073
Lunar eclipses of 1984–1987
Template:Lunar eclipse set 1984-1987
Metonic series
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 | |
| File:Lunar eclipse chart close-1948Apr23.png | File:Lunar eclipse chart close-1948Oct18.png | |||||
| 121 | 1967 Apr 24 | Total | 126 | 1967 Oct 18 | Total | |
| File:Lunar eclipse chart close-1967Apr24.png | File:Lunar eclipse chart close-1967Oct18.png | |||||
| 131 | 1986 Apr 24 | Total | 136 | 1986 Oct 17 | Total | |
| File:Lunar eclipse chart close-1986Apr24.png | File:Lunar eclipse chart close-1986Oct17.png | |||||
| 141 | 2005 Apr 24 | Penumbral | 146 | 2005 Oct 17 | Partial | |
| File:Lunar eclipse chart close-05apr24.png | File:Lunar eclipse chart close-2005Oct17.png | |||||
Saros 131
This eclipse is a part of Saros series 131, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on May 10, 1427. It contains partial eclipses from July 25, 1553 through March 22, 1932; total eclipses from April 2, 1950 through September 3, 2202; and a second set of partial eclipses from September 13, 2220 through April 9, 2563. The series ends at member 72 as a penumbral eclipse on July 7, 2707.
The longest duration of totality will be produced by member 38 at 100 minutes, 36 seconds on June 28, 2094. All eclipses in this series occur at the Moon’s descending node of orbit.[5]
| Greatest | First | |||
|---|---|---|---|---|
| File:Lunar eclipse chart close-2094Jun28.png The greatest eclipse of the series will occur on 2094 Jun 28, lasting 100 minutes, 36 seconds.[6] |
Penumbral | Partial | Total | Central |
| 1427 May 10 |
1553 Jul 25 |
1950 Apr 02 File:Lunar eclipse chart close-1950Apr02.png |
2022 May 16 File:Lunar eclipse chart close-2022may16.png | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2148 Jul 31 |
2202 Sep 03 |
2563 Apr 09 |
2707 Jul 07 | |
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.
Tritos series
Template:Lunar Tritos series February 2008
Inex series
Template:Lunar Inex series April 2015
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[7] This lunar eclipse is related to two annular solar eclipses of Solar Saros 138.
| April 18, 1977 | April 29, 1995 |
|---|---|
| File:SE1977Apr18A.png | File:SE1995Apr29A.png |
See also
Notes
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- ↑ Script error: No such module "citation/CS1".
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- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Listing of Eclipses of series 131
- ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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External links
- 1986 Apr 24 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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