Solar eclipse of May 30, 1984

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Template:Short description Script error: No such module "Solar eclipse". An annular solar eclipse occurred at the Moon's ascending node of orbit on Wednesday, May 30, 1984,[1] with a magnitude of 0.998. 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). The Moon's apparent diameter was near the average diameter because it occurred 6.6 days after apogee (on May 24, 1984, at 2:00 UTC) and 7.8 days before perigee (on June 7, 1984, at 12:20 UTC).[2]

This was the first annular solar eclipse visible in the United States in 33 years.

Annularity was visible in Mexico, Louisiana, Mississippi, Alabama, Georgia, South Carolina, North Carolina and Virginia in the United States, the Azores Islands, Morocco and Algeria. A partial eclipse was visible for parts of Hawaii, North America, Central America, the Caribbean, northern South America, Western Europe, and Northwest Africa.

Observations

During this eclipse, the apex of the moon's umbral cone was very close to the Earth's surface, and the magnitude was very large. The edges of the moon and the sun were very close to each other as seen from the Earth. Images of the chromosphere and Baily's beads on the lunar limb, which are usually only visible during a total solar eclipse, could also be taken. A team of the University of Florida took images, about half of which being those of the chromosphere and the other half the photosphere, in Greenville, South Carolina.[3][4] Jay Pasachoff led a team from Williams College, Massachusetts to Picayune, Mississippi.[5]

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.[6]

May 30, 1984 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1984 May 30 at 13:55:14.3 UTC
First Umbral External Contact 1984 May 30 at 14:57:46.9 UTC
First Central Line 1984 May 30 at 14:58:22.6 UTC
Greatest Duration 1984 May 30 at 14:58:22.6 UTC
First Umbral Internal Contact 1984 May 30 at 14:58:58.3 UTC
First Penumbral Internal Contact 1984 May 30 at 16:06:12.7 UTC
Greatest Eclipse 1984 May 30 at 16:45:41.5 UTC
Ecliptic Conjunction 1984 May 30 at 16:48:44.8 UTC
Equatorial Conjunction 1984 May 30 at 16:53:32.9 UTC
Last Penumbral Internal Contact 1984 May 30 at 17:25:00.1 UTC
Last Umbral Internal Contact 1984 May 30 at 18:32:21.8 UTC
Last Central Line 1984 May 30 at 18:32:54.6 UTC
Last Umbral External Contact 1984 May 30 at 18:33:27.3 UTC
Last Penumbral External Contact 1984 May 30 at 19:35:58.9 UTC
May 30, 1984 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.99801
Eclipse Obscuration 0.99602
Gamma 0.27552
Sun Right Ascension 04h31m02.1s
Sun Declination +21°52'05.5"
Sun Semi-Diameter 15'46.4"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 04h30m45.4s
Moon Declination +22°07'14.4"
Moon Semi-Diameter 15'30.3"
Moon Equatorial Horizontal Parallax 0°56'54.1"
ΔT 54.0 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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of May–June 1984
May 15
Descending node (full moon)
 May 30
Ascending node (new moon)
 June 13
Descending node (full moon)
File:Lunar eclipse chart close-1984May15.png File:SE1984May30A.png File:Lunar eclipse chart close-1984Jun13.png
Penumbral lunar eclipse
Lunar Saros 111		 Annular solar eclipse
Solar Saros 137		 Penumbral lunar eclipse
Lunar Saros 149

Related eclipses

Eclipses in 1984

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 137

Inex

Triad

Solar eclipses of 1982–1985

This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[7]

The partial solar eclipses on January 25, 1982 and July 20, 1982 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 1982 to 1985
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
117 June 21, 1982
File:SE1982Jun21P.png
Partial 		−1.2102 122 December 15, 1982
File:SE1982Dec15P.png
Partial 		1.1293
127 June 11, 1983
File:SE1983Jun11T.png
Total 		−0.4947 132 December 4, 1983
File:SE1983Dec04A.png
Annular 		0.4015
137 May 30, 1984
File:SE1984May30A.png
Annular 		0.2755 142
File:Solar eclipse of 22 November 1984.JPG
Partial in Gisborne,
New Zealand 		November 22, 1984
File:SE1984Nov22T.png
Total 		−0.3132
147 May 19, 1985
File:SE1985May19P.png
Partial 		1.072 152 November 12, 1985
File:SE1985Nov12T.png
Total 		−0.9795

Saros 137

Template:Solar Saros series 137

Metonic series

The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's ascending node.

22 eclipse events between January 5, 1935 and August 11, 2018
January 4–5 October 23–24 August 10–12 May 30–31 March 18–19
111 113 115 117 119
File:SE1935Jan05P.png
January 5, 1935 		File:SE1942Aug12P.png
August 12, 1942 		File:SE1946May30P.png
May 30, 1946 		File:SE1950Mar18A.png
March 18, 1950
121 123 125 127 129
File:SE1954Jan05A.png
January 5, 1954 		File:SE1957Oct23T.png
October 23, 1957 		File:SE1961Aug11A.png
August 11, 1961 		File:SE1965May30T.png
May 30, 1965 		File:SE1969Mar18A.png
March 18, 1969
131 133 135 137 139
File:SE1973Jan04A.png
January 4, 1973 		File:SE1976Oct23T.png
October 23, 1976 		File:SE1980Aug10A.png
August 10, 1980 		File:SE1984May30A.png
May 30, 1984 		File:SE1988Mar18T.png
March 18, 1988
141 143 145 147 149
File:SE1992Jan04A.png
January 4, 1992 		File:SE1995Oct24T.png
October 24, 1995 		File:SE1999Aug11T.png
August 11, 1999 		File:SE2003May31A.png
May 31, 2003 		File:SE2007Mar19P.png
March 19, 2007
151 153 155
File:SE2011Jan04P.png
January 4, 2011 		File:SE2014Oct23P.png
October 23, 2014 		File:SE2018Aug11P.png
August 11, 2018

Tritos series

Template:Solar Tritos series 2006 March 29

Inex series

Template:Solar Inex series 2013 May 10

Notes

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References

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