An annular solar eclipse will occur at the Moon's descending node of orbit on Saturday, October 3, 2043,[1] with a magnitude of 0.9497. 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 about 4.8 days before apogee (on October 7, 2043, at 23:20 UTC), the Moon's apparent diameter will be smaller.[2]
It will be unusual in that while it is an annular solar eclipse, it is not a central solar eclipse. A non-central eclipse is one where the center-line of annularity does not intersect the surface of the Earth (when the gamma is between 0.9972 and 1.0260). Instead, the center line passes just above the Earth's surface. This rare type occurs when annularity is only visible at sunset or sunrise in a polar region.
While the path of annularity will be not visible from any land areas, a partial solar eclipse will be visible for parts of Madagascar, Antarctica, and southwestern Australia. This will be the first of 56 umbral eclipses in Solar Saros 154.
Animated path
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 | 2043 October 03 at 00:44:16.8 UTC | |
| First Umbral External Contact | 2043 October 03 at 02:51:37.4 UTC | |
| Greatest Eclipse | 2043 October 03 at 03:01:48.9 UTC | |
| Last Umbral External Contact | 2043 October 03 at 03:11:24.2 UTC | |
| Ecliptic Conjunction | 2043 October 03 at 03:13:23.8 UTC | |
| Equatorial Conjunction | 2043 October 03 at 04:05:54.0 UTC | |
| Last Penumbral External Contact | 2043 October 03 at 05:19:01.1 UTC |
| Eclipse Magnitude | 0.94968 | |
| Eclipse Obscuration | - | |
| Gamma | −1.01019 | |
| Sun Right Ascension | 12h36m02.9s | |
| Sun Declination | -03°53'04.6" | |
| Sun Semi-Diameter | 15'58.8" | |
| Sun Equatorial Horizontal Parallax | 08.8" | |
| Moon Right Ascension | 12h34m15.0s | |
| Moon Declination | -04°41'56.9" | |
| Moon Semi-Diameter | 15'05.1" | |
| Moon Equatorial Horizontal Parallax | 0°55'21.7" | |
| ΔT | 80.5 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.