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Radius of the Moon: s: Radius of the Sun: t: Radius of the Earth: D: Distance from the center of Earth to the vertex of Earth's shadow cone d: Radius of the Earth's shadow at the location of the Moon n: Ratio, d/ℓ (a directly observable quantity during a lunar eclipse) x: Ratio, S/L = s/ℓ (which is calculated from φ)
Légua of 20 to a degree (Maritime légua) = 5,555.56 metres; Légua of 25 to a degree = 4,444.44 metres; The names of the several léguas referred to the number of units that made the length corresponding to an angle degree of a meridian arc. For compatibility after Portugal adopted the metric system, the metric légua of 5.0 km was used.
The 20K run (20 kilometres, or approximately 12.4 miles) is a long distance foot race.It is a rarely held race that is not recognized as an Olympic event. The event held IAAF world championship status in 2006 only, when the existing IAAF World Half Marathon Championships briefly hosted the shorter distance.
Astronomical measure uses: Earth radius R 🜨 ≈ 6,371 km [9] Lunar distance LD ≈ 384 402 km. [10] Average distance between the center of Earth and the center of the Moon. astronomical unit au. Defined as 149 597 870 700 m. [11] Approximately the distance between the Earth and Sun. light-year ly ≈ 9 460 730 472 580.8 km.
Respectively, these square divisions of land are approximately 80 chains (one mile or 1.6 km), 40 chains (half a mile or 800 m), and 20 chains (a quarter mile or 400 m) on a side. The chain is still used in agriculture: measuring wheels with a circumference of 0.1 chain (diameter ≈ 2.1 ft or 64 cm) are still readily available in Canada and ...
The men's world record for the 20 km race walk is held by Yusuke Suzuki, who walked 1:16:36 at the Asian Race Walking Championships in his home town of Nomi, Japan.Suzuki's new World Record came exactly one week after Yohann Diniz's mark who walked a then record time of 1:17:02 in Arles at the 2015 French championships.
So, for example, if a route is 20 kilometres (12 mi) with 1600 metres of climb (as is the case on leg 1 of the Bob Graham Round, Keswick to Threlkeld), the equivalent flat distance of this route is 20+(1.6×8)=32.8 kilometres (20.4 mi). Assuming an individual can maintain a speed on the flat of 5 km/h, the route will take 6 hours and 34 minutes.
View from the Swabian Jura to the Alps. Geographical distance or geodetic distance is the distance measured along the surface of the Earth, or the shortest arch length.. The formulae in this article calculate distances between points which are defined by geographical coordinates in terms of latitude and longitude.