Solar eclipse of December 12, 1909

{{Infobox solar eclipse|1909Dec12

| previous = Solar eclipse of June 17, 1909

| next = Solar eclipse of May 9, 1910

}}

A partial solar eclipse occurred at the Moon's descending node of orbit on Sunday, December 12, 1909,{{cite web|title=December 12, 1909 Partial Solar Eclipse|url=https://www.timeanddate.com/eclipse/solar/1909-december-12|publisher=timeanddate|access-date=31 July 2024}}{{Cite news

| url = https://newspapers.com/article/columbia-missourian-partial-eclipse-of-t/134467432/

| date = 1909-12-13

| page = 1

| title = Partial eclipse of the sun.

| newspaper = Columbia Missourian

| location = Columbia, Missouri

| via = Newspapers.com

| access-date = 2023-11-01

}}{{Cite news

| url = https://newspapers.com/article/whittier-daily-news-eclipse-of-the-sun/134467487/

| date = 1909-12-13

| page = 2

| title = Eclipse of the Sun

| newspaper = Whittier Daily News

| location = Whittier, California

| via = Newspapers.com

| access-date = 2023-11-01

}} with a magnitude of 0.5424. 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 partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.

This event was visible as a partial solar eclipse across Antarctica and New Zealand.

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=Partial Solar Eclipse of 1909 Dec 12|url=https://eclipsewise.com/solar/SEprime/1901-2000/SE1909Dec12Pprime.html|publisher=EclipseWise.com|access-date=31 July 2024}}

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|+December 12, 1909 Solar Eclipse Times

! Event

! Time (UTC)

First Penumbral External Contact

| 1909 December 12 at 17:56:19.6 UTC

Greatest Eclipse

| 1909 December 12 at 19:44:48.1 UTC

Ecliptic Conjunction

| 1909 December 12 at 19:58:40.0 UTC

Equatorial Conjunction

| 1909 December 12 at 20:09:23.5 UTC

Last Penumbral External Contact

| 1909 December 12 at 21:33:01.1 UTC

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|+December 12, 1909 Solar Eclipse Parameters

! Parameter

! Value

Eclipse Magnitude

| 0.54243

Eclipse Obscuration

| 0.42921

Gamma

| –1.24559

Sun Right Ascension

| 17h17m14.6s

Sun Declination

| -23°05'16.7"

Sun Semi-Diameter

| 16'14.8"

Sun Equatorial Horizontal Parallax

| 08.9"

Moon Right Ascension

| 17h16m22.9s

Moon Declination

| -24°13'34.7"

Moon Semi-Diameter

| 15'12.2"

Moon Equatorial Horizontal Parallax

| 0°55'47.8"

ΔT

| 10.4 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 November–December 1909

! November 27
Ascending node (full moon) !! December 12
Descending node (new moon)

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| Penumbral lunar eclipse
Lunar Saros 124

Annular solar eclipse
Solar Saros 150