May 1985 lunar eclipse

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Template:Short description Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s descending node of orbit on Saturday, May 4, 1985,[1] with an umbral magnitude of 1.2369. 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 only about 13.5 hours after perigee (on May 4, 1985, at 6:20 UTC), the Moon's apparent diameter was larger.[2]

This lunar eclipse was the first of a tetrad, with four total lunar eclipses in series, the others being on October 28, 1985; April 24, 1986; and October 17, 1986.

Visibility

The eclipse was completely visible over central and east Africa, eastern Europe, the western half of Asia, western Australia, and Antarctica, seen rising over much of South America, west Africa, and western Europe and setting over east and northeast Asia and much of Australia.[3]

File:Lunar eclipse from moon-1985May04.png File:Lunar eclipse chart close-1985May04.png

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]

May 4, 1985 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.18702
Umbral Magnitude 1.23687
Gamma 0.35197
Sun Right Ascension 02h47m17.2s
Sun Declination +16°07'37.7"
Sun Semi-Diameter 15'51.5"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 14h47m52.0s
Moon Declination -15°47'45.9"
Moon Semi-Diameter 16'41.4"
Moon Equatorial Horizontal Parallax 1°01'15.3"
ΔT 54.5 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.

Eclipse season of May 1985
May 4
Descending node (full moon)
 May 19
Ascending node (new moon)
File:Lunar eclipse chart close-1985May04.png File:SE1985May19P.png
Total lunar eclipse
Lunar Saros 121		 Partial solar eclipse
Solar Saros 147

Related eclipses

Eclipses in 1985

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 121

Inex

Triad

Lunar eclipses of 1984–1987

Template:Lunar eclipse set 1984-1987

Metonic series

Template:Metonic lunar eclipse 1966-2023

Saros 121

Template:Lunar Saros series 121

Tritos series

Template:Lunar Tritos series March 2007

Inex series

Template:Lunar Inex series April 2014

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 annular solar eclipses of Solar Saros 128.

April 29, 1976 May 10, 1994
File:SE1976Apr29A.png File:SE1994May10A.png

See also

Notes

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

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External links

Template:Lunar eclipses

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