Solar eclipse of October 22, 1911
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| Annular eclipse | |
 Map | |
| Gamma | 0.3224 |
|---|---|
| Magnitude | 0.965 |
| Maximum eclipse | |
| Duration | 227 s (3 min 47 s) |
| Coordinates | 6°18′N 121°24′E / 6.3°N 121.4°E |
| Max. width of band | 133 km (83 mi) |
| Times (UTC) | |
| Greatest eclipse | 4:13:02 |
| References | |
| Saros | 132 (40 of 71) |
| Catalog # (SE5000) | 9307 |
An annular solar eclipse occurred at the Moon's descending node of orbit on Sunday, October 22, 1911,[1][2][3] with a magnitude of 0.965. 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 5.75 days before apogee (on October 27, 1911, at 22:30 UTC), the Moon's apparent diameter was smaller.[4]
Annularity was visible from the Russian Empire (the parts now belonging to Kazakhstan, Uzbekistan and Kyrgyzstan), China, French Indochina (the part now belonging to Vietnam), Philippines, Dutch East Indies (today's Indonesia), Territory of Papua (now belonging to Papua New Guinea) including the capital city Port Moresby, and British Western Pacific Territories (the parts now belonging to Solomon Islands and Tuvalu, including the city of Honiara and Tulagi). A partial eclipse was visible for parts of South Asia, Southeast Asia, East Asia, Australia, and Oceania.
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.[5]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1911 October 22 at 01:19:29.5 UTC |
| First Umbral External Contact | 1911 October 22 at 02:23:49.9 UTC |
| First Central Line | 1911 October 22 at 02:25:31.6 UTC |
| First Umbral Internal Contact | 1911 October 22 at 02:27:13.6 UTC |
| First Penumbral Internal Contact | 1911 October 22 at 03:39:33.3 UTC |
| Equatorial Conjunction | 1911 October 22 at 03:54:33.7 UTC |
| Ecliptic Conjunction | 1911 October 22 at 04:09:22.2 UTC |
| Greatest Eclipse | 1911 October 22 at 04:13:02.1 UTC |
| Last Penumbral Internal Contact | 1911 October 22 at 04:46:55.9 UTC |
| Greatest Duration | 1911 October 22 at 04:53:44.9 UTC |
| Last Umbral Internal Contact | 1911 October 22 at 05:59:00.0 UTC |
| Last Central Line | 1911 October 22 at 06:00:44.7 UTC |
| Last Umbral External Contact | 1911 October 22 at 06:02:29.3 UTC |
| Last Penumbral External Contact | 1911 October 22 at 07:06:48.6 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.96497 |
| Eclipse Obscuration | 0.93116 |
| Gamma | 0.32241 |
| Sun Right Ascension | 13h42m39.4s |
| Sun Declination | -10°38'28.3" |
| Sun Semi-Diameter | 16'04.4" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 13h43m12.3s |
| Moon Declination | -10°22'21.8" |
| Moon Semi-Diameter | 15'16.9" |
| Moon Equatorial Horizontal Parallax | 0°56'05.1" |
| ΔT | 13.0 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.
| October 22 Descending node (new moon) | November 6 Ascending node (full moon) |
|---|---|
|  |
| Total solar eclipse Solar Saros 132 | Penumbral lunar eclipse Lunar Saros 144 |
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