The Ananke group is made up of moons of Jupiter which share similar orbits. Their semi-major axes range between 19.3 and 22.7 Gm, their inclinations between 145.7° and 154.8°, and their eccentricities between 0.02 and 0.28. Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... 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. ... In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolas. ... 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. ...

The group numbers between eight and sixteen members, depending on how rigorous the definition is. The eight core members are (in order of increasing distance from Jupiter):

• S/2003 J 16
• Mneme
• Euanthe
• Harpalyke
• Praxidike
• Thyone
• Ananke, the largest, which gives its name to the group
• Iocaste

The eight fringe members of the group are: S/2003 J 16 is a natural satellite of Jupiter. ... Mneme (IPA: , nee-mee, Greek Μνήμη) (Jupiter XL) is a natural satellite of Jupiter. ... Euanthe (IPA: , ew-an-thee) (Jupiter XXXIII) is a natural satellite of Jupiter. ... Harpalyke (IPA: , har-pal-i-kee, Greek ‘Αρπαλύκη) (Jupiter XXII) is a natural satellite of Jupiter. ... Praxidike (IPA: , prak-sid-i-kee, Greek Πραξιδίκη) (Jupiter XXVII) is a natural satellite of Jupiter. ... Thyone (pronounced thigh O nee) is a natural satellite of Jupiter. ... Atmospheric pressure 0 kPa Ananke (a-nang-kee, IPA ; Greek Ανάγκη) is one of Jupiters moons. ... Iocaste (IPA: , eye-oe-kas-tee, Greek Ιοκάστη) (Jupiter XXIV) is a natural satellite of Jupiter. ...

• Euporie
• S/2003 J 3
• S/2003 J 18
• Orthosie
• Thelxinoe
• Hermippe
• Helike
• S/2003 J 15

The International Astronomical Union (IAU) reserves names in -e for these moons. Euporie (IPA: , ew-por-ee-a, Greek Ευπορία) (Jupiter XXXIV) is a natural satellite of Jupiter. ... S/2003 J 3 is a natural satellite of Jupiter. ... S/2003 J 18 is a natural satellite of Jupiter. ... Orthosie (IPA: , or-thoe-see-a) (Jupiter XXXV) is a natural satellite of Jupiter. ... Thelxinoe (thel-zin-oh-ee, Greek Θελξινόη) is a natural satellite of Jupiter. ... Hermippe is a natural satellite of Jupiter. ... Helike (hel-i-kee, Greek ‘Ελίκη) is a moon of Jupiter. ... S/2003 J 15 is a natural satellite of Jupiter. ... The International Astronomical Union (IAU) unites national astronomical societies from around the world. ...