216 Kleopatra is a Main belt asteroid that was discovered by Johann Palisa on April 10, 1880 in Pola. It is named after Cleopatra, the Queen of Egypt. Johann Palisa (December 6, 1848 – May 2, 1925) was an Austrian astronomer, born in Troppau in Austrian Silesia (now in the Czech Republic). ... April 10 is the 100th day of the year in the Gregorian calendar (101st in leap years). ... 1880 was a leap year starting on Thursday (see link for calendar). ... The provisional designation of comets and asteroids are similar to each other: they both follow a pattern set in 1925 by the Minor Planet Center of the IAU. Historical designations At first, astronomers strove to assign symbols to the minor planets: 1 Ceres a stylized sickle 2 Pallas a lozenge... 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. ... 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) is a common year starting on Saturday of the Gregorian calendar. ... The Julian day or Julian day number (JDN) is the number of SI days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar 1. ... 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, is the basic unit of length in the International System of Units (SI: Système International dUnités). ... 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. ... See also Day (language) A day (symbol: d) is a unit of time. ... A Julian year is the length of an average year in the Julian calendar, 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. ... The second (symbol s) is a unit for time, and one of seven SI base units. ... 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. ... A degree (or in full a degree of arc), usually symbolized °, is a measurement of plane angle, representing 1/360 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. ... Mass iz a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... It has been suggested that Law of universal gravitation be merged into this article or section. ... 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 back or staying in an orbit within a... In astronomy, a rotation period is the time an astronomical object takes to complete one revolution around its rotation axis. ... The hour was originally defined in Egypt as 1/24 of a day, based on their duo-decimal numbering system (which counted finger joints on each hand). ... Asteroids are assigned a type based on spectral shape, color, and sometimes albedo. ... M-type asteroids are metallic asteroids; they are moderately bright (albedo . ... 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. ... Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ... Johann Palisa (December 6, 1848 – May 2, 1925) was an Austrian astronomer, born in Troppau in Austrian Silesia (now in the Czech Republic). ... April 10 is the 100th day of the year in the Gregorian calendar (101st in leap years). ... 1880 was a leap year starting on Thursday (see link for calendar). ... In user interface design, programming language design, and ergonomics, the principle (or rule) of least astonishment (or surprise) states that, when two elements of an interface conflict or are ambiguous, the behaviour should be that which will least surprise the human user or programmer at the time the conflict arises... Egyptian statue of Cleopatra VII Cleopatra VII Philopator (Κλεοπάτρα θεά φιλοπάτωρ, December, 70 BC or January, 69 BC–August 12?, 30 BC) was queen of ancient Egypt. ...

Dog bone shaped asteroid Kleopatra

Kleopatra has one of the most bizarre shapes in the solar system. By bouncing radar signals off the asteroid, a team of astronomers at the Arecibo radio telescope in Puerto Rico were able to develop a computer model of its shape, and discovered that it looks like a dog's bone. The best explanation is that two similarly sized asteroids that have collided and stuck together instead of breaking apart. Kleopatra was later observed with the Hubble Space Telescope in 1993, which was also able to resolve the bone-like shape of the asteroid.[1] Computer model of asteroid 216 Kleopatra, based on radar analysis (NASA). ... Computer model of asteroid 216 Kleopatra, based on radar analysis (NASA). ... The Arecibo Observatory is located in Arecibo, Puerto Rico on the north coast of the island. ... The Hubble Space Telescope is a telescope in orbit around the Earth. ... 1993 is a common year starting on Friday of the Gregorian calendar and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003). ...

Kleopatra is a relatively large asteroid, measuring 217 × 94 × 81 km. In composition it is an M-type asteroid, meaning that it is metallic, composed of nickel-iron. It is believed to be a loosely packed, porous object. M-type asteroids are metallic asteroids; they are moderately bright (albedo . ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic Atomic mass 58. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ...

External links

• Astronomers Catch Images of Giant Metal Dog Bone Asteroid – NASA article
• An Asteroid for the Dogs

References

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Lightcurve Data File

215 Oenone is a typical Main belt asteroid. ... 217 Eudora is a large Main belt asteroid. ...