NationMaster - Encyclopedia: 225 Henrietta

225 Henrietta is a very large outer Main belt asteroid. It is classified as a C-type asteroid and is probably composed of privitive carbonaceous material. It has very dark surface. Johann Palisa (December 6, 1848 â€“ May 2, 1925) was an Austrian astronomer, born in Troppau in Austrian Silesia (now in the Czech Republic). ... April 19 is the 109th day of the year in the Gregorian calendar (110th in leap years). ... 1882 (MDCCCLXXXII) was a common year starting on Sunday (see link for calendar) of the Gregorian calendar or a common year starting on Tuesday of the 12-day slower Julian calendar. ... Provisional designation of in astronomy is the naming convention applied to astronomical objects immediately following their discovery. ... Minor planets, or planetoids are minor bodies of the Solar system orbiting the Sun (or of other planetary systems orbiting other stars) that are larger than meteoroids (the largest of which might be taken to be around 10 meters or so across) but smaller than major planets (Mercury having a... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... 65 Cybele (sib-a-lee) is one of the largest asteroids in the main belt. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... January 30 is the 30th day of the year in the Gregorian calendar. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... The Julian day or Julian day number (JDN) is the (integer) number of days that have elapsed since Monday, January 1, 4713 BC in the proleptic Julian calendar [1]. That day is counted as Julian day zero. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... giga- (symbol: G) is a prefix in the SI system of units denoting 109, or 1 000 000 000. ... The metre, or meter (U.S.), is a measure of length. ... 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. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... Water, Rabbit, and Deer: three of the 20 day symbols in the Aztec calendar, from the Aztec Sun Stone. ... In astronomy, a Julian year is a unit of time defined as exactly 365. ... The orbital speed of a body, generally a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more massive body. ... Look up second in Wiktionary, the free dictionary. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ... A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized Â°, is a measurement of plane angle, representing 1ï¼360 of a full rotation. ... The Longitude of the ascending node () is one of the orbital elements used to specify the orbit of an object in space. ... The argument of the perihelion is one of the orbital elements describing the orbit of a planet. ... In the study of orbital dynamics the mean anomaly is a measure of time, specific to the orbiting body p, which is a multiple of 2π radians at and only at periapsis. ... For the majority of numbered asteroids, almost nothing is known apart from a few physical parameters. ... Unsolved problems in physics: What causes anything to have mass? Mass is a property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... Density, or volumic mass (ISO 31), is a measure of mass per given unit volume. ... Gravity is a force of attraction that acts between bodies that have mass. ... Space Shuttle Atlantis launches on mission STS-71 In physics, for a given gravitational field and a given position, the escape velocity is the minimum speed an object without propulsion, at that position, needs to have to move away indefinitely from the source of the field, as opposed to falling... 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. ... Asteroids are assigned a type based on spectral shape, color, and sometimes albedo. ... C-type asteroids are carbonaceous asteroids. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us, in the absence of interstellar extinction. ... Albedo is a ratio of scattered to incident electromagnetic radiation power. ... The geometric albedo of an astronomical body is the ratio of its total brightness at zero phase angle to that of an idealised fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section. ... Fig. ... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... 253 Mathilde, a C-type asteroid. ... C-type asteroids are carbonaceous asteroids. ... This article belongs in one or more categories. ...

It belongs to Cybele group of asteroids and is probably in 4:7 orbital resonance with planet Jupiter. 65 Cybele (sib-a-lee) is one of the largest asteroids in the main belt. ... Minor planet is the official term for asteroids and trans-Neptunian objects. ... In celestial mechanics, an orbital resonance occurs when two orbiting bodies exert a regular, periodic gravitational influence on each other. ... The eight planets and three dwarf planets of the Solar System. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...

It was discovered by Johann Palisa on April 19, 1882 in Vienna and named after Henrietta, wife of astronomer Pierre J. C. Janssen. Johann Palisa (December 6, 1848 â€“ May 2, 1925) was an Austrian astronomer, born in Troppau in Austrian Silesia (now in the Czech Republic). ... April 19 is the 109th day of the year in the Gregorian calendar (110th in leap years). ... 1882 (MDCCCLXXXII) was a common year starting on Sunday (see link for calendar) of the Gregorian calendar or a common year starting on Tuesday of the 12-day slower Julian calendar. ... Inhabitants according to official census figures: 1800 to 2005 Vienna in 1858 Vienna (German: Wien ) is the capital of Austria, and also one of the nine States of Austria. ... Jules Janssen took this photo of the French officers Charles Renard and Arthur Krebs La France dirigible from his Meudon (France) astrophysic observatory in 1885. ...

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Categories: Cybele asteroids | C-type asteroids Minor planets, or planetoids are minor bodies of the Solar system orbiting the Sun (or of other planetary systems orbiting other stars) that are larger than meteoroids (the largest of which might be taken to be around 10 meters or so across) but smaller than major planets (Mercury having a... 224 Oceana is a sizeable Main belt asteroid. ... 226 Weringia is a typical Main belt asteroid. ... A small solar system body is a term defined in 2006 by the International Astronomical Union to describe solar system objects which are not planets or dwarf planets: [1] Therefore it refers to these objects that can be further classified based on their orbit or composition: all known minor planets... Vulcanoids are hypothetical asteroids that may orbit in a dynamically stable zone between 0. ... Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earths orbit. ... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... Image of the Trojan asteroids in front of and behind Jupiter along its orbital path. ... The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... Damocloids are asteroids such as 5335 Damocles and 1996 PW that have long-period highly eccentric orbits typical of periodic comets such as 1P/Halley, but without showing a cometary coma or tail. ... Comet Hale-Bopp A comet is a small body in the solar system that orbits the Sun and (at least occasionally) exhibits a coma (or atmosphere) and/or a tail â€” both primarily from the effects of solar radiation upon the comets nucleus, which itself is a minor body composed... A trans-Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... 243 Ida and its moon Dactyl An asteroid moon is an asteroid that orbits another asteroid. ... Major features of the Solar System (not to scale): The Sun, the eight planets, the asteroid belt containing the dwarf planet Ceres, outermost there is the dwarf planet Pluto (the dwarf planet Eris not shown), and a comet. ... This is a list of numbered minor planets, nearly all of them asteroids, in sequential order. ... This page alphabetically lists the first thousand asteroids to be numbered, which are mostly in the main belt. ... This is a list of named asteroids, with links to the Wikipedia articles on the people, places, characters and concepts that they are named after. ...

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