54 Alexandra is a very large and dark main belt asteroid. In physics, an orbit is the path that an object makes, around another object, whilst under the influence of a source of centripetal force, such as gravity. ... The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. ... In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The astronomical unit (AU or au or a. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... For the geometric term, see diameter. ... A kilometre (American spelling: kilometer), symbol: km is a unit of length in the metric system equal to 1000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ... In astronomy, a rotation period is the time an astronomical object takes to complete one revolution around its rotation axis. ... The hour (symbol: h) is a unit of time. ... In astronomy the term spectral class refers to classifying objects according to their spectral lines, which indicate an objects chemical composition. ... C-type asteroids are carbonaceous asteroids. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ... The albedo is a measure of reflectivity of a surface or body. ... Hermann Mayer Salomon Goldschmidt (June 17, 1802 – April 26, 1866) was a German astronomer and painter who spent much of his life in France. ... 1858 is a common year starting on Friday. ... The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ...

It was discovered by H. Goldschmidt on September 10, 1858 and named after the German explorer Alexander von Humboldt. Hermann Mayer Salomon Goldschmidt (June 17, 1802 – April 26, 1866) was a German astronomer and painter who spent much of his life in France. ... September 10 is the 253rd day of the year (254th in leap years). ... 1858 is a common year starting on Friday. ... See also explorations, sea explorers, astronaut, conquistador, travelogue, the History of Science and Technology and Biography. ... Friedrich Heinrich Alexander, Baron von Humboldt, (September 14, 1769, Berlin–May 6, 1859, Berlin), was a German naturalist and explorer, and the younger brother of the Prussian minister, philosopher, and linguist Wilhelm von Humboldt. ...

Aspects

… | Previous minor planet | 54 Alexandra | Next minor planet | … 53 Kalypso is a large and very dark main belt asteroid. ... 55 Pandora is a quite large and very bright Main belt asteroid. ...