A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Sunday, July 27, 1980, with an umbral magnitude of −0.7263. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. 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. Occurring about 3.2 days before perigee (on July 30, 1980, at 23:40 UTC), the Moon's apparent diameter was larger.
Visibility The eclipse was completely visible over central and east Africa, eastern Europe, much of Asia, Australia, and Antarctica, seen rising over western Europe and west Africa and setting over northeast Asia and the western Pacific Ocean.
Eclipse details Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
+July 27, 1980 Lunar Eclipse Parameters Parameter Value Penumbral Magnitude 0.25354 Umbral Magnitude −0.72634 Gamma 1.41391 Sun Right Ascension 08h28m52.6s Sun Declination +19°02'51.8" Sun Semi-Diameter 15'45.1" Sun Equatorial Horizontal Parallax 08.7" Moon Right Ascension 20h28m01.0s Moon Declination -17°40'21.2" Moon Semi-Diameter 16'04.5" Moon Equatorial Horizontal Parallax 0°58'59.8" ΔT 51.0 s
Eclipse season
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. The first and last eclipse in this sequence is separated by one synodic month.
+ Eclipse season of July–August 1980 July 27Descending node (full moon) August 10Ascending node (new moon) August 26Descending node (full moon) Penumbral lunar eclipseLunar Saros 109 Annular solar eclipseSolar Saros 135 Penumbral lunar eclipseLunar Saros 147
Related eclipses Eclipses in 1980 A total solar eclipse on February 16. A penumbral lunar eclipse on March 1. A penumbral lunar eclipse on July 27. An annular solar eclipse on August 10. A penumbral lunar eclipse on August 26.
Metonic Followed by: Lunar eclipse of May 15, 1984
Tzolkinex Preceded by: Lunar eclipse of June 15, 1973
Half-Saros Preceded by: Solar eclipse of July 22, 1971
Tritos Preceded by: Lunar eclipse of August 27, 1969 Followed by: Lunar eclipse of June 27, 1991
Lunar Saros 109 Preceded by: Lunar eclipse of July 17, 1962 Followed by: Lunar eclipse of August 8, 1998
Inex Preceded by: Lunar eclipse of August 17, 1951 Followed by: Lunar eclipse of July 7, 2009
Triad Preceded by: Lunar eclipse of September 25, 1893 Followed by: Lunar eclipse of May 28, 2067
Lunar eclipses of 1980–1984
Saros 109
Tritos series
Inex series
Half-Saros cycle A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros This lunar eclipse is related to one partial solar eclipse of Solar Saros 116. July 22, 1971
See also List of lunar eclipses List of 20th-century lunar eclipses
Notes
External links