Solar eclipse of December 4, 1964
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| Partial eclipse | |
 Map | |
| Gamma | 1.1193 |
|---|---|
| Magnitude | 0.7518 |
| Maximum eclipse | |
| Coordinates | 64°18′N 173°18′W / 64.3°N 173.3°W |
| Times (UTC) | |
| Greatest eclipse | 1:31:54 |
| References | |
| Saros | 122 (55 of 70) |
| Catalog # (SE5000) | 9431 |
A partial solar eclipse occurred at the Moon's descending node of orbit between Thursday, December 3 and Friday, December 4, 1964,[1] 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.
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]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1964 December 3 at 23:21:15.6 UTC |
| Equatorial Conjunction | 1964 December 4 at 01:00:31.0 UTC |
| Ecliptic Conjunction | 1964 December 4 at 01:18:47.3 UTC |
| Greatest Eclipse | 1964 December 4 at 01:31:54.2 UTC |
| Last Penumbral External Contact | 1964 December 4 at 03:42:48.7 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.75179 |
| Eclipse Obscuration | 0.66267 |
| Gamma | 1.11929 |
| Sun Right Ascension | 16h41m43.6s |
| Sun Declination | -22°13'30.4" |
| Sun Semi-Diameter | 16'13.7" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 16h42m43.4s |
| Moon Declination | -21°14'34.6" |
| Moon Semi-Diameter | 14'46.7" |
| Moon Equatorial Horizontal Parallax | 0°54'14.3" |
| ΔT | 35.7 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.
| December 4 Descending node (new moon) | December 19 Ascending node (full moon) |
|---|---|
|  |
| Partial solar eclipse Solar Saros 122 | Total lunar eclipse Lunar Saros 134 |
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