WebMar 9, 2024 · distance = 2 ⋅ R ⋅ a r c t a n ( a, 1 − a) where the latitude is $ \varphi $, the longitude is denoted as $ \lambda $ and $ R $ corresponds to Earths mean radius in kilometers which is approximately 6371 km. We …
List of asteroid close approaches to Earth in 2024 - Wikipedia
WebApparent diameter from Earth Maximum (seconds of arc) 1952. Minimum (seconds of arc) 1887. Mean (106km) 149.6 Minimum (106km) 147.1 Maximum (106km) 152.1 Solar Magnetic Field Typical magnetic field … WebOct 22, 2024 · The diameter of a circle is twice the radius, giving us a diameter for Earth of 12,756 km. Note: The Earth is almost, but not quite, a perfect sphere. Its equatorial radius is 6378 km, but its polar radius is 6357 km - in other words, the Earth is slightly flattened. Eratosthenes was measuring the polar radius, and his value (using the 0.15 … asadullah empire
geometry - How to calculate the area of a polygon on the earth
Earth radius (denoted as R🜨 or $${\displaystyle R_{E}}$$) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid, the radius ranges from a maximum of nearly 6,378 km (3,963 mi) (equatorial radius, denoted a) to a minimum of nearly 6,357 km … See more Earth's rotation, internal density variations, and external tidal forces cause its shape to deviate systematically from a perfect sphere. Local topography increases the variance, resulting in a surface of profound complexity. Our … See more The following radii are derived from the World Geodetic System 1984 (WGS-84) reference ellipsoid. It is an idealized surface, and the Earth measurements used to calculate it … See more The Earth can be modeled as a sphere in many ways. This section describes the common ways. The various radii derived here use the notation and dimensions noted above for the … See more Earth's diameter is simply twice Earth's radius; for example, equatorial diameter (2a) and polar diameter (2b). For the WGS84 ellipsoid, that's respectively: • 2a = 12,756.2740 km (7,926.3812 mi), • 2b = 12,713.5046 km (7,899.8055 mi). See more Geocentric radius The geocentric radius is the distance from the Earth's center to a point on the spheroid surface at geodetic latitude φ: where a and b are, respectively, the equatorial radius … See more The mathematical expressions above apply over the surface of the ellipsoid. The cases below considers Earth's topography, above or below a See more The first published reference to the Earth's size appeared around 350 BC, when Aristotle reported in his book On the Heavens that mathematicians had guessed the circumference … See more Webwhere R is the radius of the Earth. The same equation can also be derived using the Pythagorean theorem. At the horizon, the line of sight is a tangent to the Earth and is also perpendicular to Earth's radius. This sets up a … WebNote that you get the distance back in the same unit as you pass in with the parameter $earthRadius. The default value is 6371000 meters so the result will be in [m] too. To get the result in miles, you could e.g. pass 3959 miles as … asadullah and meru