- Source: Solar eclipse of December 4, 1964
A partial solar eclipse occurred at the Moon's descending node of orbit between Thursday, December 3 and Friday, December 4, 1964, with a magnitude of 0.7518. 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.
This was the last of four partial solar eclipses in 1964, with the others occurring on January 14, June 10, and July 9.
A partial eclipse was visible for parts of Northeast Asia, southwest Alaska, and Hawaii.
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.
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.
Related eclipses
= Eclipses in 1964
=A partial solar eclipse on January 14.
A partial solar eclipse on June 10.
A total lunar eclipse on June 25.
A partial solar eclipse on July 9.
A partial solar eclipse on December 4.
A total lunar eclipse on December 19.
= Metonic
=Preceded by: Solar eclipse of February 15, 1961
Followed by: Solar eclipse of September 22, 1968
= Tzolkinex
=Preceded by: Solar eclipse of October 23, 1957
Followed by: Solar eclipse of January 16, 1972
= Half-Saros
=Preceded by: Lunar eclipse of November 29, 1955
Followed by: Lunar eclipse of December 10, 1973
= Tritos
=Preceded by: Solar eclipse of January 5, 1954
Followed by: Solar eclipse of November 3, 1975
= Solar Saros 122
=Preceded by: Solar eclipse of November 23, 1946
Followed by: Solar eclipse of December 15, 1982
= Inex
=Preceded by: Solar eclipse of December 25, 1935
Followed by: Solar eclipse of November 13, 1993
= Triad
=Preceded by: Solar eclipse of February 2, 1878
Followed by: Solar eclipse of October 4, 2051
= Solar eclipses of 1964–1967
=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.
The partial solar eclipses on January 14, 1964 and July 9, 1964 occur in the previous lunar year eclipse set.
= Saros 122
=This eclipse is a part of Saros series 122, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on April 17, 991 AD. It contains total eclipses from July 12, 1135 through August 3, 1171; hybrid eclipses on August 13, 1189 and August 25, 1207; and annular eclipses from September 4, 1225 through October 10, 1874. The series ends at member 70 as a partial eclipse on May 17, 2235. 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 totality was produced by member 9 at 1 minutes, 25 seconds on July 12, 1135, and the longest duration of annularity was produced by member 50 at 6 minutes, 28 seconds on October 10, 1874. All eclipses in this series occur at the Moon’s descending node of orbit.
= 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 descending node.
= Tritos series
=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.
= Inex series
=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.
References
External links
Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
Google interactive map
Besselian elements
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