An annular solar eclipse occurred at the Moon's ascending node of orbit on Sunday, August 10, 1980, with a magnitude of 0.9727. 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. Occurring about 5 days before apogee (on August 15, 1980, at 19:00 UTC), the Moon's apparent diameter was smaller.
Annularity was visible in Tabuaeran of Kiribati, Peru, Bolivia, northern Paraguay and Brazil. The whole path of annularity was east of the 180th meridian, seeing the eclipse on August 10. (However, time zone of the Line Islands including Tabuaeran was changed from UTC−10 to UTC+14 in 1995. The date of the eclipse would be August 11 if observing the present day's time zone.)
A partial eclipse was visible for parts of eastern Oceania, Hawaii, the southern United States, Mexico, Central America, the Caribbean, and South America. Most of these areas are east of the 180th meridian, seeing the eclipse on August 10, while very few islands in the Pacific Ocean are west of the 180th meridian, seeing the eclipse on August 11.
Eclipse details Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the Moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.
+August 10, 1980 Solar Eclipse Times Event Time (UTC) First Penumbral External Contact 1980 August 10 at 16:14:41.9 UTC First Umbral External Contact 1980 August 10 at 17:18:11.1 UTC First Central Line 1980 August 10 at 17:19:35.0 UTC First Umbral Internal Contact 1980 August 10 at 17:20:59.0 UTC First Penumbral Internal Contact 1980 August 10 at 18:26:38.7 UTC Greatest Duration 1980 August 10 at 19:04:16.8 UTC Ecliptic Conjunction 1980 August 10 at 19:10:08.9 UTC Greatest Eclipse 1980 August 10 at 19:12:21.1 UTC Equatorial Conjunction 1980 August 10 at 19:17:07.0 UTC Last Penumbral Internal Contact 1980 August 10 at 19:57:54.5 UTC Last Umbral Internal Contact 1980 August 10 at 21:03:37.7 UTC Last Central Line 1980 August 10 at 21:05:04.4 UTC Last Umbral External Contact 1980 August 10 at 21:06:31.0 UTC Last Penumbral External Contact 1980 August 10 at 22:10:03.9 UTC
+August 10, 1980 Solar Eclipse Parameters Parameter Value Eclipse Magnitude 0.97267 Eclipse Obscuration 0.94609 Gamma −0.19154 Sun Right Ascension 09h22m51.8s Sun Declination +15°21'02.2" Sun Semi-Diameter 15'46.9" Sun Equatorial Horizontal Parallax 08.7" Moon Right Ascension 09h22m42.5s Moon Declination +15°10'40.6" Moon Semi-Diameter 15'07.1" Moon Equatorial Horizontal Parallax 0°55'29.1" 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 Preceded by: Solar eclipse of October 23, 1976 Followed by: Solar eclipse of May 30, 1984
Tzolkinex Preceded by: Solar eclipse of June 30, 1973 Followed by: Solar eclipse of September 23, 1987
Half-Saros Preceded by: Lunar eclipse of August 6, 1971 Followed by: Lunar eclipse of August 16, 1989
Tritos Preceded by: Solar eclipse of September 11, 1969 Followed by: Solar eclipse of July 11, 1991
Solar Saros 135 Preceded by: Solar eclipse of July 31, 1962 Followed by: Solar eclipse of August 22, 1998
Inex Preceded by: Solar eclipse of September 1, 1951 Followed by: Solar eclipse of July 22, 2009
Triad Preceded by: Solar eclipse of October 9, 1893 Followed by: Solar eclipse of June 11, 2067
Solar eclipses of 1979–1982
Saros 135
Metonic series
Tritos series
Inex series
Notes
References