Iocaste (eye'-ə-kas'-tee, IPA: [ˌaɪəˈkæsti]; Greek Ιοκάστη), or Jupiter XXIV, is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the temporary designation S/2000 J 3. The International Phonetic Alphabet (IPA) is a system of phonetic notation devised by linguists to accurately and uniquely represent each of the wide variety of sounds (phones or phonemes) used in spoken human language. ... Prograde motion is the motion of a planetary body in a direction similar to that of other bodies within its system, and is sometimes called direct motion, especially in astrology. ... In astronomy, an irregular satellite is a natural satellite following a distant, inclined, often retrograde orbit and believed to be captured as opposed to a regular satellite, formed in situ. ... Moons of solar system scaled to Earths Moon A natural satellite is a moon (not capitalized), that is, any natural object that orbits a planet. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... The University of Hawai`i, formally the University of Hawai`i System and popularly known as UH, is a public, co-educational college and university system that confers associate, bachelor, master, doctoral and post-doctoral degrees through three university campuses, seven community college campuses, an employment training center, three university... Scott S. Sheppard is an astronomer based at the Institute for Astronomy at the University of Hawaii. ... This article is about the year 2000. ...

Iocaste orbits Jupiter at an average distance of 20,723 Mm in 609.427 days, at an inclination of 147° to the ecliptic (127° to Jupiter's equator) with an eccentricity of 0.2874. Inclination in general is the angle between a reference plane and another plane or axis of direction. ... The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ...

It is named after Jocasta, the mother/wife of Oedipus in Greek mythology. In Greek mythology, Jocasta, also Iocaste (Iοκαστη) or Epikastê, was a daughter of Menocenes, Queen of Thebes, who unwittingly married Oedipus, her own son. ... Oedipus and the Sphinx, from an 1879 illustration from Stories from the Greek Tragedians by Alfred Church Oedipus was the mythical king of Thebes, son of Laius and Jocasta, who unknowingly killed his father and married his mother. ... // Greek mythology consists in part of a large collection of narratives that explain the origins of the world and detail the lives and adventures of a wide variety of gods, goddesses, heroes, and heroines. ...

Iocaste belongs to the Ananke group, believed to be the remnants of a break-up of a captured heliocentric asteroid.^{[1] [2]} The Ananke group is made up of moons of Jupiter which share similar orbits. ...

The satellite is about 5 kilometres in diameter ^[3] and appears grey (colour indices B-V=0.63, R-V=0.36), similar to C-type asteroids.^[4] In astronomy, color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... C-type asteroids are carbonaceous asteroids. ...

See also

• irregular satellites

In astronomy, an irregular satellite is a natural satellite following a distant, inclined, often retrograde orbit and believed to be captured as opposed to a regular satellite, formed in situ. ...

External links

• David Jewiit pages
• Scott Sheppard pages

References

1. ^ Scott S. Sheppard, David C. Jewitt An abundant population of small irregular satellites around Jupiter, Nature, 423 (May 2003), pp.261-263 (pdf)
2. ^ David Nesvorný, Jose L. A. Alvarellos, Luke Dones, and Harold F. Levison Orbital and Collisional Evolution of the Irregular Satellites, The Astronomical Journal,126 (2003), pages 398–429. (pdf)
3. ^ Scott S. Sheppard, David C. Jewitt, Carolyn Porco Jupiter's outer satellites and Trojans, In: Jupiter. The planet, satellites and magnetosphere. Edited by Fran Bagenal, Timothy E. Dowling, William B. McKinnon. Cambridge planetary science, Vol. 1, Cambridge, UK: Cambridge University Press, ISBN 0-521-81808-7, 2004, p. 263 - 280 (pdf).
4. ^ Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites,Icarus, 166,(2003), pp. 33-45. Preprint

• Ephemeris (IUA)[1]
• Mean orbital parameters (NASA)[2]

Scott S. Sheppard is an astronomer based at the Institute for Astronomy at the University of Hawaii. ... David C. Jewitt is a Professor of astronomy at the University of Hawaii Institute for Astronomy. ... Scott S. Sheppard is an astronomer based at the Institute for Astronomy at the University of Hawaii. ... David C. Jewitt is a Professor of astronomy at the University of Hawaii Institute for Astronomy. ... Carolyn C. Porco is an American planetary scientist. ...

Orthosie (IPA: , or-thoe-see-a) (Jupiter XXXV) is a natural satellite of Jupiter. ... S/2003 J 16 is a natural satellite of Jupiter. ...

edit Jupiter's natural satellites
Inner satellites | Galilean moons | Themisto | Himalia group | Carpo
S/2003 J 12 | Ananke group | Carme group | Pasiphaë group | S/2003 J 2
See also: Pronunciation key | Rings of Jupiter