22 Kalliope (ka-lye'-a-pee) is a very large main belt asteroid discovered by J. R. Hind on November 16, 1852. It is named after Calliope, the Greek Muse of epic poetry. 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. ... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... 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. ... (This page refers to eccitricity in astrodynamics. ... For the authentication, authorisation, and accounting protocol, see DIAMETER. In geometry, a diameter (Greek words diairo = divide and metro = measure) of a circle is any straight line segment that passes through the center and whose endpoints are on the circular boundary, or, in more modern usage, the length of such... A kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). ... Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... The gram or gramme, symbol g, is a unit of mass, and is defined in the SI system of units as one one-thousandth of a kilogram (i. ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... 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). ... In astronomy the term spectral class refers to classifying objects according to their spectral lines, which indicate an objects chemical composition. ... 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. ... John Russell Hind (May 12, 1823 – December 23, 1895) was a British astronomer. ... 1852 was a leap year starting on Thursday (see link for calendar). ... 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. ... John Russell Hind (May 12, 1823 – December 23, 1895) was a British astronomer. ... November 16 is the 320th day of the year (321st in leap years) in the Gregorian Calendar, with 45 days remaining. ... 1852 was a leap year starting on Thursday (see link for calendar). ... Detail of painting The Muses Urania and Calliope by Simon Vouet In Greek mythology, Calliope (Greek: Καλλιoπε, beautiful-voiced) was the muse for epic poetry. ... For other uses see Muse (disambiguation). ... The epic is a broadly defined genre of poetry, which retells in a continuous narrative the life and works of a heroic or mythological person or group of persons. ...

Kalliope is 181 km in diameter, and is a M-type asteroid, indicating fairly pure nickel-iron composition. However, recent measurements show that 22 Kalliope's density is only 2.37 g/cm³, so it must contain considerable amount of other materials. Observations from the European Southern Observatory indicate that the asteroid is slightly elongated in shape. [1] For the authentication, authorisation, and accounting protocol, see DIAMETER. In geometry, a diameter (Greek words diairo = divide and metro = measure) of a circle is any straight line segment that passes through the center and whose endpoints are on the circular boundary, or, in more modern usage, the length of such... 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. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... The gram or gramme, symbol g, is a unit of mass, and is defined in the SI system of units as one one-thousandth of a kilogram (i. ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... The European Southern Observatory (ESO) is an international astronomical organisation, composed and supported by ten countries from the European Union plus Switzerland and was created in 1962. ...

On Aug 29, 2001, astronomers Jean-Luc Margot and Michael E. Brown discovered a moon orbiting 22 Kalliope with the Keck telescope. Another team also detected the moon with the Canada-France-Hawaii telescope on Sep 02, 2001. The moon has been named Linus after the mythological figure. Linus is about 38 km in diameter and orbits about 1,000 km from Kalliope. It may be impact ejecta from a collision with Kalliope or a fragment captured after disruption of a parent asteroid (a proto-Kalliope). An astronomer or astrophysicist is a scientist whose area of research is astronomy or astrophysics. ... Jean-Luc Margot is a Belgian astronomer and an Assistant Professor at Cornell University. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... An asteroid moon is an asteroid that orbits another asteroid. ... The Mauna Kea Observatory, an institute of the University of Hawaii, is considered one of the most important land-based observatories in the world for its isolated, unobstructed views of space without interference from man-made light sources. ... Linus may refer to any of three sons of Apollo from Greek mythology: Son of Apollo and Urania, he was killed by Apollo during a contest. ... A kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). ... For the authentication, authorisation, and accounting protocol, see DIAMETER. In geometry, a diameter (Greek words diairo = divide and metro = measure) of a circle is any straight line segment that passes through the center and whose endpoints are on the circular boundary, or, in more modern usage, the length of such... Impact - the (possibly destructive) effect of transfer of energy from one object striking another resulting in a near-instant change of relative velocity. ... In volcanology, ejecta consists of particles that came out of a volcanic vent, traveled though the air or under water, and fell back on the ground surface or on the ocean floor. ... Physical collision Dynamics Deflection happens when an object hits a plane surface In physics, collision means the action of bodies striking or coming together (touching). ...

External links

• Data from Johnston's Archive
• Link to the Linus discovery paper , "A Low-Density M-type Asteroid in the Main Belt"
• Orbit of Linus, companion of 22 Kalliope
• Information on Kalliope including a shape model

21 Lutetia (loo TET ee a) is a large Main belt asteroid, about 100 kilometers in diameter. ... 23 Thalia (tha-lye-a) is a large main belt asteroid. ...