October 1986 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, October 17, 1986,[1] with an umbral magnitude of 1.2455. 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 5.5 days before apogee (on October 23, 1986, at 6:35 UTC), the Moon's apparent diameter was smaller.[2]
This lunar eclipse was the last of a tetrad, with four total lunar eclipses in series, the others being on May 4, 1985; October 28, 1985; and April 24, 1986.
Visibility
The eclipse was completely visible over east Africa, eastern Europe, and Asia, seen rising over northeastern North America, eastern South America, western Europe, and west Africa and setting over Australia, northeast Asia, and the western Pacific Ocean.[3]
| File:Lunar eclipse from moon-1986Oct17.png File:Lunar eclipse chart close-1986Oct17.png |
Eclipse details
Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 2.30082 |
| Umbral Magnitude | 1.24545 |
| Gamma | 0.31887 |
| Sun Right Ascension | 13h29m20.1s |
| Sun Declination | -09°21'26.2" |
| Sun Semi-Diameter | 16'03.1" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 01h28m47.0s |
| Moon Declination | +09°37'14.9" |
| Moon Semi-Diameter | 15'12.6" |
| Moon Equatorial Horizontal Parallax | 0°55'49.1" |
| ΔT | 55.2 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.
| October 3 Descending node (new moon) |
October 17 Ascending node (full moon) |
|---|---|
| File:SE1986Oct03H.png | File:Lunar eclipse chart close-1986Oct17.png |
| Hybrid solar eclipse Solar Saros 124 |
Total lunar eclipse Lunar Saros 136 |
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 December 30, 1982
- Followed by: Lunar eclipse of August 6, 1990
Tzolkinex
- Preceded by: Lunar eclipse of September 6, 1979
- Followed by: Lunar eclipse of November 29, 1993
Half-Saros
- Preceded by: Solar eclipse of October 12, 1977
- Followed by: Solar eclipse of October 24, 1995
Tritos
- Preceded by: Lunar eclipse of November 18, 1975
- Followed by: Lunar eclipse of September 16, 1997
Lunar Saros 136
- Preceded by: Lunar eclipse of October 6, 1968
- Followed by: Lunar eclipse of October 28, 2004
Inex
- Preceded by: Lunar eclipse of November 7, 1957
- Followed by: Lunar eclipse of September 28, 2015
Triad
- Preceded by: Lunar eclipse of December 17, 1899
- Followed by: Lunar eclipse of August 17, 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 136
Template:Lunar Saros series 136
Tritos series
Template:Lunar Tritos series August 2008
Inex series
Template:Lunar Inex series September 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).[5] This lunar eclipse is related to two total solar eclipses of Solar Saros 143.
| October 12, 1977 | October 24, 1995 |
|---|---|
| File:SE1977Oct12T.png | File:SE1995Oct24T.png |
See also
Notes
<templatestyles src="Reflist/styles.css" />
Script error: No such module "Check for unknown parameters".
External links
- 1986 Oct 17 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
Script error: No such module "Navbox".