A partial solar eclipse occurred at the Moon's ascending node of orbit on Thursday, July 9, 1964, with a magnitude of 0.3221. 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 third of four partial solar eclipses in 1964, with the others occurring on January 14, June 10, and December 4.

A partial eclipse was visible for parts of Canada, Greenland, and the eastern Soviet Union.

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.

July 9, 1964 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1964 July 9 at 10:05:53.0 UTC
Equatorial Conjunction1964 July 9 at 11:13:17.6 UTC
Greatest Eclipse1964 July 9 at 11:17:53.0 UTC
Ecliptic Conjunction1964 July 9 at 11:31:22.2 UTC
Last Penumbral External Contact1964 July 9 at 12:29:56.9 UTC
July 9, 1964 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude0.32215
Eclipse Obscuration0.21157
Gamma1.36228
Sun Right Ascension07h14m49.0s
Sun Declination+22°19'48.2"
Sun Semi-Diameter15'43.9"
Sun Equatorial Horizontal Parallax08.6"
Moon Right Ascension07h15m00.8s
Moon Declination+23°42'32.7"
Moon Semi-Diameter16'35.8"
Moon Equatorial Horizontal Parallax1°00'54.7"
ΔT35.4 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 June–July 1964
June 10 Ascending node (new moon)June 25 Descending node (full moon)July 9 Ascending node (new moon)
Partial solar eclipse Solar Saros 117Total lunar eclipse Lunar Saros 129Partial solar eclipse Solar Saros 155

Related eclipses

Eclipses in 1964

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 155

Inex

Triad

  • Preceded by: Solar eclipse of September 7, 1877

Solar eclipses of 1961–1964

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 June 10, 1964 and December 4, 1964 occur in the next lunar year eclipse set.

Solar eclipse series sets from 1961 to 1964
Descending nodeAscending node
SarosMapGammaSarosMapGamma
120February 15, 1961 Total0.883125August 11, 1961 Annular−0.8859
130February 5, 1962 Total0.2107135July 31, 1962 Annular−0.113
140January 25, 1963 Annular−0.4898145July 20, 1963 Total0.6571
150January 14, 1964 Partial−1.2354155July 9, 1964 Partial1.3623

Saros 155

This eclipse is a part of Saros series 155, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on June 17, 1928. It contains total eclipses from September 12, 2072 through August 30, 2649; hybrid eclipses from September 10, 2667 through October 2, 2703; and annular eclipses from October 13, 2721 through May 8, 3064. The series ends at member 71 as a partial eclipse on July 24, 3190. 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 will be produced by member 14 at 4 minutes, 5 seconds on November 6, 2162, and the longest duration of annularity will be produced by member 63 at 5 minutes, 31 seconds on April 28, 3046. All eclipses in this series occur at the Moon’s ascending node of orbit.

Series members 1–16 occur between 1928 and 2200:
123
June 17, 1928June 29, 1946July 9, 1964
456
July 20, 1982July 31, 2000August 11, 2018
789
August 21, 2036September 1–2, 2054September 12, 2072
101112
September 23, 2090October 4–5, 2108October 16, 2126
131415
October 26, 2144November 6–7, 2162November 17, 2180
16
November 28, 2198

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 December 2, 1880 and July 9, 1964
December 2–3September 20–21July 9–10April 26–28February 13–14
111113115117119
December 2, 1880July 9, 1888April 26, 1892February 13, 1896
121123125127129
December 3, 1899September 21, 1903July 10, 1907April 28, 1911February 14, 1915
131133135137139
December 3, 1918September 21, 1922July 9, 1926April 28, 1930February 14, 1934
141143145147149
December 2, 1937September 21, 1941July 9, 1945April 28, 1949February 14, 1953
151153155
December 2, 1956September 20, 1960July 9, 1964

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.

Series members between 1801 and 1964
September 17, 1811 (Saros 141)August 16, 1822 (Saros 142)July 17, 1833 (Saros 143)June 16, 1844 (Saros 144)May 16, 1855 (Saros 145)
April 15, 1866 (Saros 146)March 15, 1877 (Saros 147)February 11, 1888 (Saros 148)January 11, 1899 (Saros 149)December 12, 1909 (Saros 150)
November 10, 1920 (Saros 151)October 11, 1931 (Saros 152)September 10, 1942 (Saros 153)August 9, 1953 (Saros 154)July 9, 1964 (Saros 155)

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.

Series members between 1801 and 1964
October 19, 1819 (Saros 150)September 27, 1848 (Saros 151)September 7, 1877 (Saros 152)
August 20, 1906 (Saros 153)July 30, 1935 (Saros 154)July 9, 1964 (Saros 155)

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