A total solar eclipse occurred at the Moon's ascending node of orbit on Thursday, May 9, 1929, with a magnitude of 1.0562. 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 1.7 days before perigee (on May 10, 1929, at 21:00 UTC), the Moon's apparent diameter was larger.
Totality was visible from Dutch East Indies (today's Indonesia), Federated Malay States (now belonging to Malaysia), Siam (name changed to Thailand later), French Indochina (the part now belonging to Vietnam), Spratly Islands, Philippines, and South Seas Mandate in Japan (the part now belonging to FS Micronesia). A partial eclipse was visible for parts of Southeast Africa, South Asia, Southeast Asia, East Asia, and Australia.
Observations A team of British and German scientists observed the total eclipse in Pattani province in southern Siam. King Rama VII and Queen Rambai Barni also visited the observation camp set up by foreign scientists and observed the eclipse together in Pattani. This was the last time that Siam (Thailand) received a large-scale solar eclipse observation team so far. The other teams Thailand received later, including the American team for the total solar eclipse of June 20, 1955 were much smaller.
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.
+May 9, 1929 Solar Eclipse Times Event Time (UTC) First Penumbral External Contact 1929 May 9 at 03:32:58.0 UTC First Umbral External Contact 1929 May 9 at 04:29:32.5 UTC First Central Line 1929 May 9 at 04:30:38.2 UTC First Umbral Internal Contact 1929 May 9 at 04:31:43.9 UTC First Penumbral Internal Contact 1929 May 9 at 05:32:55.2 UTC Equatorial Conjunction 1929 May 9 at 05:58:29.8 UTC Ecliptic Conjunction 1929 May 9 at 06:07:34.8 UTC Greatest Eclipse 1929 May 9 at 06:10:34.1 UTC Greatest Duration 1929 May 9 at 06:17:47.1 UTC Last Penumbral Internal Contact 1929 May 9 at 06:48:30.3 UTC Last Umbral Internal Contact 1929 May 9 at 07:49:29.9 UTC Last Central Line 1929 May 9 at 07:50:37.4 UTC Last Umbral External Contact 1929 May 9 at 07:51:44.7 UTC Last Penumbral External Contact 1929 May 9 at 08:48:11.5 UTC
+May 9, 1929 Solar Eclipse Parameters Parameter Value Eclipse Magnitude 1.05622 Eclipse Obscuration 1.11560 Gamma −0.28869 Sun Right Ascension 03h02m38.7s Sun Declination +17°14'10.1" Sun Semi-Diameter 15'50.3" Sun Equatorial Horizontal Parallax 08.7" Moon Right Ascension 03h03m05.7s Moon Declination +16°58'00.8" Moon Semi-Diameter 16'27.7" Moon Equatorial Horizontal Parallax 1°00'24.9" ΔT 24.0 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.
+ Eclipse season of May 1929 May 9Ascending node (new moon) May 23Descending node (full moon) Total solar eclipseSolar Saros 127 Penumbral lunar eclipseLunar Saros 139
Related eclipses Eclipses in 1929 A total solar eclipse on May 9. A penumbral lunar eclipse on May 23. An annular solar eclipse on November 1. A penumbral lunar eclipse on November 17.
Metonic Preceded by: Solar eclipse of July 20, 1925 Followed by: Solar eclipse of February 24, 1933
Tzolkinex Preceded by: Solar eclipse of March 28, 1922 Followed by: Solar eclipse of June 19, 1936
Half-Saros Preceded by: Lunar eclipse of May 3, 1920 Followed by: Lunar eclipse of May 14, 1938
Tritos Preceded by: Solar eclipse of June 8, 1918 Followed by: Solar eclipse of April 7, 1940
Solar Saros 127 Preceded by: Solar eclipse of April 28, 1911 Followed by: Solar eclipse of May 20, 1947
Inex Preceded by: Solar eclipse of May 28, 1900 Followed by: Solar eclipse of April 19, 1958
Triad Preceded by: Solar eclipse of July 8, 1842 Followed by: Solar eclipse of March 9, 2016
Solar eclipses of 1928–1931
Saros 127
Metonic series
Tritos series
Inex series
References
External links
Photo of Solar Corona May 9, 1929