49th parallel north: Difference between revisions

Revision as of 06:15, 7 November 2024

Revision as of 14:31, 13 November 2024

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From a point on the ground at this latitude, the [[sun]] is above the horizon for 16 hours, 12 minutes during the [[summer solstice]] and 8 hours, 14 minutes during the [[winter solstice]].<ref>{{Cite web|date=2019-09-24|title=Duration of Daylight/Darkness Table for One Year|url=http://aa.usno.navy.mil/data/docs/Dur_OneYear.php|url-status=dead|archive-url=https://web.archive.org/web/20191012094319/http://aa.usno.navy.mil/data/docs/Dur_OneYear.php|archive-date=2019-10-12|access-date=2021-03-10|website=U.S. Naval Observatory}}</ref>

This latitude also roughly corresponds to the minimum latitude in which [[astronomical twilight]] can last all night near the summer solstice. All-night astronomical twilight lasts from [[June 99th]] to [[July 22nd]].{{Cite web|url=https://www.timeanddate.com/sun/@49,45?month=6}}{{Cite web|url=https://www.timeanddate.com/sun/@49,45?month=7}} At [[midnight]] on the summer solstice, the altitude of the sun is −17.56°.{{CitationCite neededweb|dateurl=November 2024https://www.timeanddate.com/astronomy/night/@49,45}}

Slightly less than one-eighth of the Earth's surface is north of the 49th parallel.