Back خط عرض 45° شمال Arabic 45. paralela (sjever) BS Paral·lel 45° nord Catalan 45. nordlige breddekreds Danish Paralelo 45 norte Spanish مدار ۴۵ درجه شمالی Persian 45e parallèle nord French 45 अक्षांश उत्तर Hindi 45-րդ հյուսիսային զուգահեռական Armenian Maika-45 a paralelo amianan ILO
.svg)
The 45th parallel north is a circle of latitude that is 45 degrees north of Earth's equator. It crosses Europe, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. The 45th parallel north is often called the halfway point between the equator and the North Pole, but the true halfway point is 16.0 km (9.9 mi) north of it (approximately between 45°08'36" and 45°08'37") because Earth is an oblate spheroid; that is, it bulges at the equator and is flattened at the poles.[1]
At this latitude, the sun is visible for 15 hours 37 minutes during the summer solstice, and 8 hours 46 minutes during the winter solstice. The midday Sun stands 21.6° above the southern horizon at the December solstice, 68.4° at the June solstice, and exactly 45.0° at either equinox.[2]
- ^ "The Half-Way to the Pole Line". 2 May 2006. Archived from the original on 2 May 2006. Retrieved 16 July 2018.
- ^ "Duration of Daylight/Darkness Table for One Year". U.S. Naval Observatory. 2019-09-24. Archived from the original on 2019-10-12. Retrieved 2021-03-10.