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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.
20° 353 meter at 1 km distance Serpens-Aquila Rift: 20° by 10° Canis Major Overdensity: 12° by 12° Smith's Cloud: 11° Large Magellanic Cloud: 10.75° by 9.17° Note: brightest galaxy, other than the Milky Way, in the night sky (0.9 apparent magnitude (V)) Barnard's loop: 10° Zeta Ophiuchi Sh2-27 nebula 10° Width of fist with arm ...
Haberreiter, Schmutz & Kosovichev (2008) [1] determined the radius corresponding to the solar photosphere to be 695,660 ± 140 kilometres (432,263 ± 87 miles). This new value is consistent with helioseismic estimates; the same study showed that previous estimates using inflection point methods had been overestimated by approximately 300 km ...
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.
In this list the periods are sourced from the Light Curve Data Base (LCDB), [2] and are given in both seconds and hours. Most minor planets have rotation periods between 2 and 20 hours. [ 1 ] [ 3 ] As of 2019 [update] , a group of 887 bodies – most of them are stony near-Earth asteroids with small diameters of barely 1 kilometre – have an ...
Distance of the outer limit of Oort cloud from the Sun (estimated, corresponds to 1.2 light-years) — Parsec: 206 265 — One parsec. The parsec is defined in terms of the astronomical unit, is used to measure distances beyond the scope of the Solar System and is about 3.26 light-years: 1 pc = 1 au/tan(1″) [6] [61] Proxima Centauri: 268 000 ...
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The planet Earth has a rather slight equatorial bulge; its equatorial diameter is about 43 km (27 mi) greater than its polar diameter, with a difference of about 1 ⁄ 298 of the equatorial diameter. If Earth were scaled down to a globe with an equatorial diameter of 1 metre (3.3 ft), that difference would be only 3 mm (0.12 in).