Solar eclipse of May 30, 1984

An annular solar eclipse occurred on May 30, 1984. 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. Annularity was visible in Mexico, the United States, Azores Islands, Morocco and Algeria. It was the first annular solar eclipse visible in the US in 33 years. The moon's apparent diameter was near the average diameter because occurs 6.7 days after apogee (Apogee on May 24, 1984 at 01:00 UTC) and 7.8 days before perigee (Perigee on June 7, 1984 at 11:15 UTC).

Solar eclipse of May 30, 1984
SE1984May30A.png
Map
Type of eclipse
NatureAnnular
Gamma0.2755
Magnitude0.998
Maximum eclipse
Duration11 sec (0 m 11 s)
Coordinates37°30′N 76°42′W / 37.5°N 76.7°W / 37.5; -76.7
Max. width of band7 km (4.3 mi)
Times (UTC)
Greatest eclipse16:45:41
References
Saros137 (34 of 70)
Catalog # (SE5000)9474

Related eclipsesEdit

Eclipses of 1984Edit

Solar eclipses of 1982–1985Edit

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.[1]

Note: Partial solar eclipses on January 25, 1982 and July 20, 1982 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 1982–1985
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
117  
1982 June 21
Partial
-1.21017 122  
1982 December 15
Partial
1.12928
127  
1983 June 11
Total
-0.49475 132  
1983 December 4
Annular
0.40150
137  
1984 May 30
Annular
0.27552 142
 
Partial from Gisborne, NZ
 
1984 November 22
Total
-0.31318
147  
1985 May 19
Partial
1.07197 152  
1985 November 12
Total
-0.97948

Saros 137Edit

It is a part of Saros cycle 137, repeating every 18 years, 11 days, containing 70 events. The series started with partial solar eclipse on May 25, 1389. It contains total eclipses from August 20, 1533 through December 6, 1695, first set of hybrid eclipses from December 17, 1713 through February 11, 1804, first set of annular eclipses from February 21, 1822 through March 25, 1876, second set of hybrid eclipses from April 6, 1894 through April 28, 1930, and second set of annular eclipses from May 9, 1948 through April 13, 2507. The series ends at member 70 as a partial eclipse on June 28, 2633. The longest duration of totality was 2 minutes, 55 seconds on September 10, 1569. Solar Saros 137 has 55 umbral eclipses from August 20, 1533 through April 13, 2507 (973.62 years). That's almost 1 millennium!

Inex seriesEdit

This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.

Metonic seriesEdit

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
 
January 5, 1935
 
August 12, 1942
 
May 30, 1946
 
March 18, 1950
121 123 125 127 129
 
January 5, 1954
 
October 23, 1957
 
August 11, 1961
 
May 30, 1965
 
March 18, 1969
131 133 135 137 139
 
January 4, 1973
 
October 23, 1976
 
August 10, 1980
 
May 30, 1984
 
March 18, 1988
141 143 145 147 149
 
January 4, 1992
 
October 24, 1995
 
August 11, 1999
 
May 31, 2003
 
March 19, 2007
151 153 155
 
January 4, 2011
 
October 23, 2014
 
August 11, 2018

NotesEdit

  1. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.

ReferencesEdit