Ananke (a-nang'-kee, IPA /ə'næŋ.ki:/; Greek Ανάγκη) is one of Jupiter's moons. It was discovered by Seth Barnes Nicholson at Mount Wilson Observatory in 1951 and is named after the mythological Ananke, the mother of Adrastea by Jupiter. Seth Barnes Nicholson (November 12, 1891 – July 2, 1963) was an American astronomer. ... September 28 is the 271st day of the year in the Gregorian calendar (272nd in leap years). ... 1951 was a common year starting on Monday; see its calendar. ... 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. ... RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... 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). ... The astronomical unit (AU or au or a. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... 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). ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... 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). ... 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. ... The circumference is the distance around a closed curve. ... 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). ... // Basic explanation The velocity of an object is simply its speed and its direction. ... 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. ... The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ... Moons of solar system scaled to Earths Moon The common noun moon (not capitalized) is used to mean any natural satellite of the other planets. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... For the geometric term, see diameter. ... This article explains the meaning of area as a physical quantity. ... Square kilometre (US spelling: Square kilometer), symbol km², is an SI unit of surface area. ... Volume, also called capacity, is a quantification of how much space an object occupies. ... A cubic kilometre (symbol km³) is an SI derived unit of volume. ... 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. ... It has been suggested that Law of universal gravitation be merged into this article or section. ... Acceleration is the time rate of change of velocity, and at any point on a v-t graph, it is given by the gradient of the tangent to that point In physics, acceleration (symbol: a) is defined as the rate of change (or time derivative) of velocity. ... 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... On a prograde planet like the Earth, the sidereal day is shorter than the solar day. ... Axial tilt is an astronomical term regarding the inclination angle of a planets rotational axis in relation to its orbital plane. ... 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. ... The title of this article is incorrect due to technical limitations. ... diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure) Atmospheric pressure is the pressure above any area in the Earths atmosphere caused by the weight of air. ... The pascal (symbol Pa) is the SI unit of pressure. ... This is a concise version of the International Phonetic Alphabet for English sounds. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Seth Barnes Nicholson (November 12, 1891 – July 2, 1963) was an American astronomer. ... The Mount Wilson Observatory (MWO) is an astronomical observatory in Los Angeles County, California. ... 1951 was a common year starting on Monday; see its calendar. ... In Greek mythology, Ananke (Greek ) was was the personification of destiny, unalterable necessity and fate. ... A goddess in Greek mythology and a daughter of Zeus, Adrasteia (inescapable) was also an epithet applied to Rhea, Cybele, Nemesis and Ananke. ... Jupiter In Roman mythology, Jupiter (sometimes shortened to Jove) held the same role as Zeus in the Greek pantheon. ...

Ananke did not receive its present name until 1975; before then, it was simply known as Jupiter XII. It was sometimes called "Adrastea". Note that Adrastea is now the name of another satellite of Jupiter. 1975 was a common year starting on Wednesday (the link is to a full 1975 calendar). ... Atmospheric pressure 0 kPa Adrastea (IPA: , ad-ra-stee-a, Greek Αδράστεια) is the second of Jupiters known moons (counting outward from the planet). ...

It gives its name to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°. The Ananke group is made up of moons of Jupiter which share similar orbits. ...

External links

• Nicholson, S.B., "An unidentified object near Jupiter, probably a new satellite", PASP 63 (1951) 297–299

S/2003 J 16 is a natural satellite of Jupiter. ... Praxidike (IPA: , prak-sid-i-kee, Greek Πραξιδίκη) (Jupiter XXVII) is a natural satellite of Jupiter. ...