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The mean apparent magnitude of Uranus is 5.68 with a standard deviation of 0.17, ... with a mass of only 0.55 Earth masses and a radius less than 20% of the planet; ...
Vesta (radius 262.7 ± 0.1 km), the second-largest asteroid, appears to have a differentiated interior and therefore likely was once a dwarf planet, but it is no longer very round today. [74] Pallas (radius 255.5 ± 2 km ), the third-largest asteroid, appears never to have completed differentiation and likewise has an irregular shape.
For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.
For planet Earth, which can be approximated as an oblate spheroid with radii 6 378.1 km and 6 356.8 km, the mean radius is = (( ) ) / = .The equatorial and polar radii of a planet are often denoted and , respectively.
The Schwarzschild radius or the gravitational radius is a physical ... is a coordinate singularity, meaning that it is an artifact of the ... Uranus: 8. 681 × 10 25 ...
For Earth's annual orbit path, ... Uranus: 0.047 2: Jupiter: 0.048 4: ... This will reduce the mean orbital radius and raise temperatures in both hemispheres closer ...
Mean radius. 584.7 ± 2.8 km (0.092 ... Once every 42 years, when Uranus has an equinox and its equatorial plane intersects the Earth, mutual occultations of Uranus's ...
Earth radius (denoted as R 🜨 or 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 (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).