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Solar eclipse of May 19, 1985

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Solar eclipse of May 19, 1985
Map
Type of eclipse
NaturePartial
Gamma1.072
Magnitude0.8406
Maximum eclipse
Coordinates63°12′N 81°06′E / 63.2°N 81.1°E / 63.2; 81.1
Times (UTC)
Greatest eclipse21:29:38
References
Saros147 (21 of 80)
Catalog # (SE5000)9476

A partial solar eclipse occurred at the Moon's ascending node of orbit between Sunday, May 19 and Monday, May 20, 1985,[1] with a magnitude of 0.8406. 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. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.

A partial eclipse was visible near sunrise on May 20 over Japan and northeast Russia and ended on May 19 over Alaska and near sunset over northern Canada and Greenland.

Eclipse details

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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.[2]

May 19, 1985 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1985 May 19 at 19:15:42.2 UTC
Greatest Eclipse 1985 May 19 at 21:29:37.8 UTC
Ecliptic Conjunction 1985 May 19 at 21:42:01.7 UTC
Equatorial Conjunction 1985 May 19 at 22:11:12.4 UTC
Last Penumbral External Contact 1985 May 19 at 23:43:13.0 UTC
May 19, 1985 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.84064
Eclipse Obscuration 0.77714
Gamma 1.07197
Sun Right Ascension 03h46m23.8s
Sun Declination +19°54'02.6"
Sun Semi-Diameter 15'48.3"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 03h45m05.8s
Moon Declination +20°49'15.8"
Moon Semi-Diameter 14'49.5"
Moon Equatorial Horizontal Parallax 0°54'24.6"
ΔT 54.5 s

Eclipse season

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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)
Total lunar eclipse
Lunar Saros 121
Partial solar eclipse
Solar Saros 147
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Eclipses in 1985

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Solar Saros 147

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Inex

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Triad

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Solar eclipses of 1982–1985

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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.[3]

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

Partial
−1.2102 122 December 15, 1982

Partial
1.1293
127 June 11, 1983

Total
−0.4947 132 December 4, 1983

Annular
0.4015
137 May 30, 1984

Annular
0.2755 142

Partial in Gisborne,
New Zealand
November 22, 1984

Total
−0.3132
147 May 19, 1985

Partial
1.072 152 November 12, 1985

Total
−0.9795

Saros 147

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This eclipse is a part of Saros series 147, repeating every 18 years, 11 days, and containing 80 events. The series started with a partial solar eclipse on October 12, 1624. It contains annular eclipses from May 31, 2003 through July 31, 2706. There are no hybrid or total eclipses in this set. The series ends at member 80 as a partial eclipse on February 24, 3049. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.

The longest duration of annularity will be produced by member 38 at 9 minutes, 41 seconds on November 21, 2291. All eclipses in this series occur at the Moon’s ascending node of orbit.[4]

Series members 11–32 occur between 1801 and 2200:
11 12 13

January 30, 1805

February 11, 1823

February 21, 1841
14 15 16

March 4, 1859

March 15, 1877

March 26, 1895
17 18 19

April 6, 1913

April 18, 1931

April 28, 1949
20 21 22

May 9, 1967

May 19, 1985

May 31, 2003
23 24 25

June 10, 2021

June 21, 2039

July 1, 2057
26 27 28

July 13, 2075

July 23, 2093

August 4, 2111
29 30 31

August 15, 2129

August 26, 2147

September 5, 2165
32

September 16, 2183

Metonic series

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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 December 24, 1916 and July 31, 2000
December 24–25 October 12 July 31–August 1 May 19–20 March 7
111 113 115 117 119

December 24, 1916

July 31, 1924

May 19, 1928

March 7, 1932
121 123 125 127 129

December 25, 1935

October 12, 1939

August 1, 1943

May 20, 1947

March 7, 1951
131 133 135 137 139

December 25, 1954

October 12, 1958

July 31, 1962

May 20, 1966

March 7, 1970
141 143 145 147 149

December 24, 1973

October 12, 1977

July 31, 1981

May 19, 1985

March 7, 1989
151 153 155

December 24, 1992

October 12, 1996

July 31, 2000

Tritos series

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This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.

The partial solar eclipses on December 7, 2170 (part of Saros 164) and November 7, 2181 (part of Saros 165) are also a part of this series but are not included in the table below.

Series members between 1801 and 2105

September 28, 1810
(Saros 131)

August 27, 1821
(Saros 132)

July 27, 1832
(Saros 133)

June 27, 1843
(Saros 134)

May 26, 1854
(Saros 135)

April 25, 1865
(Saros 136)

March 25, 1876
(Saros 137)

February 22, 1887
(Saros 138)

January 22, 1898
(Saros 139)

December 23, 1908
(Saros 140)

November 22, 1919
(Saros 141)

October 21, 1930
(Saros 142)

September 21, 1941
(Saros 143)

August 20, 1952
(Saros 144)

July 20, 1963
(Saros 145)

June 20, 1974
(Saros 146)

May 19, 1985
(Saros 147)

April 17, 1996
(Saros 148)

March 19, 2007
(Saros 149)

February 15, 2018
(Saros 150)

January 14, 2029
(Saros 151)

December 15, 2039
(Saros 152)

November 14, 2050
(Saros 153)

October 13, 2061
(Saros 154)

September 12, 2072
(Saros 155)

August 13, 2083
(Saros 156)

July 12, 2094
(Saros 157)

June 12, 2105
(Saros 158)

Inex series

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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.

Series members between 1801 and 2200

September 17, 1811
(Saros 141)

August 27, 1840
(Saros 142)

August 7, 1869
(Saros 143)

July 18, 1898
(Saros 144)

June 29, 1927
(Saros 145)

June 8, 1956
(Saros 146)

May 19, 1985
(Saros 147)

April 29, 2014
(Saros 148)

April 9, 2043
(Saros 149)

March 19, 2072
(Saros 150)

February 28, 2101
(Saros 151)

February 8, 2130
(Saros 152)

January 19, 2159
(Saros 153)

December 29, 2187
(Saros 154)

References

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  1. ^ "May 19, 1985 Partial Solar Eclipse". timeanddate. Retrieved 9 August 2024.
  2. ^ "Partial Solar Eclipse of 1985 May 19". EclipseWise.com. Retrieved 9 August 2024.
  3. ^ 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.
  4. ^ "NASA - Catalog of Solar Eclipses of Saros 147". eclipse.gsfc.nasa.gov.
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