An annular solar eclipse occurred at the Moon's ascending node of orbit on Sunday, August 1, 1943,[1] with a magnitude of 0.9409. 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. Occurring only about 25 minutes before apogee (on August 1, 1943, at 4:40 UTC), the Moon's apparent diameter was smaller.[2] Apogee did occur as the eclipse was just before its greatest eclipse.
Annularity was visible in the southern Indian Ocean, with the only land being Île Amsterdam in French Madagascar (now belonging to French Southern and Antarctic Lands). A partial solar eclipse was visible from Australia, Indonesia, Malaysia, eastern Madagascar, Antarctica's Wilkes Land.
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.[3]
| First Penumbral External Contact | 1943 August 01 at 01:36:43.5 UTC | |
| First Umbral External Contact | 1943 August 01 at 03:02:00.9 UTC | |
| First Central Line | 1943 August 01 at 03:05:56.2 UTC | |
| First Umbral Internal Contact | 1943 August 01 at 03:10:00.5 UTC | |
| Ecliptic Conjunction | 1943 August 01 at 04:06:41.0 UTC | |
| Greatest Duration | 1943 August 01 at 04:13:30.8 UTC | |
| Greatest Eclipse | 1943 August 01 at 04:16:13.0 UTC | |
| Equatorial Conjunction | 1943 August 01 at 04:31:47.4 UTC | |
| Last Umbral Internal Contact | 1943 August 01 at 05:22:14.2 UTC | |
| Last Central Line | 1943 August 01 at 05:26:18.8 UTC | |
| Last Umbral External Contact | 1943 August 01 at 05:30:14.3 UTC | |
| Last Penumbral External Contact | 1943 August 01 at 06:55:35.4 UTC |
| Eclipse Magnitude | 0.94090 | |
| Eclipse Obscuration | 0.88530 | |
| Gamma | −0.80410 | |
| Sun Right Ascension | 08h41m53.3s | |
| Sun Declination | +18°15'27.8" | |
| Sun Semi-Diameter | 15'45.5" | |
| Sun Equatorial Horizontal Parallax | 08.7" | |
| Moon Right Ascension | 08h41m24.1s | |
| Moon Declination | +17°32'46.0" | |
| Moon Semi-Diameter | 14'41.9" | |
| Moon Equatorial Horizontal Parallax | 0°53'56.6" | |
| ΔT | 26.0 s |
See also: Eclipse cycle. 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.