Solar eclipse of October 22, 1911

{{Infobox solar eclipse|1911Oct22

| previous = Solar eclipse of April 28, 1911

| next = Solar eclipse of April 17, 1912

}}

An annular solar eclipse occurred at the Moon's descending node of orbit on Sunday, October 22, 1911,{{cite web|title=October 22, 1911 Total Solar Eclipse|url=https://www.timeanddate.com/eclipse/solar/1911-october-22|publisher=timeanddate|access-date=31 July 2024}}{{Cite news

| url = https://newspapers.com/article/the-daily-telegraph-partial-solar-eclips/134538838/

| date = 1911-10-23

| page = 8

| title = PARTIAL SOLAR ECLIPSE.

| newspaper = The Daily Telegraph

| location = Sydney, New South Wales, Australia

| via = Newspapers.com

| access-date = 2023-11-03

}}{{Cite news

| url = https://newspapers.com/article/the-morning-call-solar-eclipse/134538851/

| date = 1911-10-23

| page = 9

| title = Solar Eclipse.

| newspaper = The Morning Call

| location = Allentown, Pennsylvania

| via = Newspapers.com

| access-date = 2023-11-03

}} 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 larger.{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=1911&n=136|publisher=timeanddate|access-date=31 July 2024}}

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.

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.{{cite web|title=Annular Solar Eclipse of 1911 Oct 22|url=https://eclipsewise.com/solar/SEprime/1901-2000/SE1911Oct22Aprime.html|publisher=EclipseWise.com|access-date=31 July 2024}}

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|+October 22, 1911 Solar Eclipse Times

! 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

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|+October 22, 1911 Solar Eclipse Parameters

! 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.

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|+ Eclipse season of October–November 1911

! October 22
Descending node (new moon) !! November 6
Ascending node (full moon)

200px

align=center

| Total solar eclipse
Solar Saros 132

Penumbral lunar eclipse
Lunar Saros 144