Asteroids Astronomy

See semi-major axis. achondrites: stony meteorite without chondrules. Afel distance Q: The point of the orbit of an object as it is furthest from the Sun albedo: ratio between the amount of light received by a star or a surface and the fraction of the light reflected by the same . Alpha (?): see phase angle. Love: class of asteroids that approach Earth, whose orbits cross that of Earth. Apollo class asteroid approaching Earth, whose orbits cross that of Earth.

phase angle: for Solar System objects, angle between the Earth and the Sun as seen from the object. argument of perihelion angle between the plane of the orbit from the ascending node and perihelion measured in the direction of motion. astrometry: accurate measurement of the position of astronomical objects, usually with respect to standard catalogs stellar positions. For computations of orbits of asteroids are acceptable measures with an error of 1 “or 2” (1 or 2 arcseconds) Aten: class asteroids that approach Earth, whose orbits cross that of Earth at aphelion. AU: astronomical unit, half the Earth-sun distance, 149,597,870 km. B (1,0): absolute magnitude in the blue.

absorption bands: dark lines superimposed on the continuum. beta (?): see coefficient of phase. Centaurs: family of objects halfway between asteroids and comets. asteroid belt: a region of space between Mars and Jupiter are located where the vast majority of asteroids. phase ratio: cadence in which varies the magnitude of an asteroid with the phase angle, in units of mag / degrees. coma: gas diffuse region around the nucleus of a comet. commensurate: an orbital configuration where two bodies orbit a common barycenter (the Sun) when a period is a rational fraction of the other. chondrites: meteorites with chondrules. carbonaceous chondrites: rare type of meteorite characterized by the presence of carbon compounds. chondrules: rounded particles 0.1 to 1mm diameter, found in stony meteorites and are made up of silicates. conjunction: position of two stars that coincide with the same length elliptical and, consequently, are on the same side of Earth. contact binary asteroid figure composed of two spherical asteroid in touch. light curve: graphical representation of the temporal variation of the apparent magnitude of a star. Earth-crosser (Earth-crosser) type of asteroid whose orbit occasionally intersects that of Earth, as a result of disturbances of distant planets. ecliptic: circle of the celestial sphere, which runs the Sun in its apparent motion, or Earth in real movement in the course of a year. It is called the ecliptic plane to one in which there is the Earth’s orbit and the center of our globe and the Sun This plane forms an angle of 23 27 ‘with the plane of Earth Ecuador. opposition effect: increase in apparent brightness of an asteroid with small phase angles. elements.

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