50th parallel north
At this latitude the sun is visible for 16 hours, 22 minutes during the summer solstice and 8 hours, 4 minutes during the winter solstice, this is also the lowest latitude where there is no true night in the calendar month of June. The maximum altitude of the sun during the summer solstice is 63.44 degrees and during the winter solstice it is 16.56 degrees. During the summer solstice, nighttime does not get beyond astronomical twilight.
At this latitude, the average sea surface temperature between 1982 and 2011 was about 8.5°C (47.3°F).
Around the world
Starting at the Prime Meridian and heading eastwards, the parallel 50° north passes through:
From the signing of the 1875 Treaty of Saint Petersburg until the Russo-Japanese War which broke in 1904, Russia had full control of Sakhalin island. As a result of the 1905 Treaty of Portsmouth that brought an end to the Russo-Japanese War, the portion of the island south of the 50th parallel line became Japanese territory, part of Karafuto Prefecture. However, following the month long Soviet–Japanese War during the summer of 1945, the entire island was reunified under Soviet control.
- "Duration of Daylight/Darkness Table for One Year". aa.usno.navy.mil.
- "Earth-Sun geometry - The Encyclopedia of Earth". www.eoearth.org.
- Sevela, Mariya. "Sakhalin: the Japanese Under Soviet Rule". History Today. Retrieved 10 May 2014.
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