Solar eclipse of October 1, 1921
A total solar eclipse occurred at the Moon's ascending node of orbit on Saturday, October 1, 1921, with a magnitude of 1.0293. 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 total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 1.9 days after perigee, the Moon's apparent diameter was larger.
Totality was visible from parts of Antarctica. A partial eclipse was visible for parts of South America and Antarctica.
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.| Event | Time |
| First Penumbral External Contact | 1921 October 1 at 10:27:26.7 UTC |
| First Umbral External Contact | 1921 October 1 at 11:58:17.2 UTC |
| First Central Line | 1921 October 1 at 12:00:11.9 UTC |
| First Umbral Internal Contact | 1921 October 1 at 12:02:12.3 UTC |
| Ecliptic Conjunction | 1921 October 1 at 12:26:22.9 UTC |
| Greatest Duration | 1921 October 1 at 12:35:07.2 UTC |
| Greatest Eclipse | 1921 October 1 at 12:35:58.1 UTC |
| Equatorial Conjunction | 1921 October 1 at 13:07:31.9 UTC |
| Last Umbral Internal Contact | 1921 October 1 at 13:09:22.8 UTC |
| Last Central Line | 1921 October 1 at 13:11:21.2 UTC |
| Last Umbral External Contact | 1921 October 1 at 13:13:14.0 UTC |
| Last Penumbral External Contact | 1921 October 1 at 14:44:18.5 UTC |
| Parameter | Value |
| Eclipse Magnitude | 1.02931 |
| Eclipse Obscuration | 1.05948 |
| Gamma | −0.93833 |
| Sun Right Ascension | 12h28m35.7s |
| Sun Declination | -03°05'21.9" |
| Sun Semi-Diameter | 15'58.8" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 12h27m27.1s |
| Moon Declination | -03°58'54.5" |
| Moon Semi-Diameter | 16'21.8" |
| Moon Equatorial Horizontal Parallax | 1°00'03.1" |
| ΔT | 22.4 s |
Eclipse season
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months 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.| October 1 Ascending node | October 16 Descending node |
| Total solar eclipse Solar Saros 123 | Partial lunar eclipse Lunar Saros 135 |
Related eclipses
Eclipses in 1921
- An annular solar eclipse on April 8.
- A total lunar eclipse on April 22.A total solar eclipse on October 1.
- A partial lunar eclipse on October 16.
Metonic
- Preceded by: Solar eclipse of December 14, 1917
- Followed by: Solar eclipse of July 20, 1925
Tzolkinex
- Preceded by: Solar eclipse of August 21, 1914
- Followed by: Solar eclipse of November 12, 1928
Half-Saros
- Preceded by: Lunar eclipse of September 26, 1912
- Followed by: Lunar eclipse of October 7, 1930
Tritos
- Preceded by: Solar eclipse of November 2, 1910
- Followed by: Solar eclipse of August 31, 1932
Solar Saros 123
- Preceded by: Solar eclipse of September 21, 1903
- Followed by: Solar eclipse of October 12, 1939
Inex
- Preceded by: Solar eclipse of October 20, 1892
- Followed by: Solar eclipse of September 12, 1950
Triad
- Preceded by: Solar eclipse of November 30, 1834
- Followed by: Solar eclipse of August 1, 2008