S/2003 J 23

S/2003 J 23 is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard et al. in 2004 from pictures taken in 2003.[2][3]

S/2003 J 23
Discovery image of S/2003 J 23 by the Canada-France-Hawaii Telescope in February 2003
Discovery
Discovered byScott S. Sheppard
Discovery date6 February 2003 (imaged)
January 2004 (announced)
Orbital characteristics [1]
24055500 km
Eccentricity0.309
−759.7 days
Inclination149.2°
Satellite ofJupiter
GroupPasiphae group?
Physical characteristics
Mean diameter
2 km
23.6

    S/2003 J 23 is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 22,740 Mm in 700.538 days, at an inclination of 149° to the ecliptic (149° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.3931.

    It belongs to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 Gm, and with inclinations ranging between 144.5° and 158.3°.

    This moon is currently considered lost.[4][5][6][7]

    References
    1. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
    2. IAUC 8281: S/2003 J 23 2004 February 4 (discovery)
    3. MPEC 2004-B81: S/2003 J 23 2004 January 31 (discovery and ephemeris)
    4. Beatty, Kelly (4 April 2012). "Outer-Planet Moons Found — and Lost". www.skyandtelescope.com. Sky & Telescope. Retrieved 27 June 2017.
    5. Brozović, Marina; Jacobson, Robert A. (9 March 2017). "The Orbits of Jupiter's Irregular Satellites". The Astronomical Journal. 153 (4): 147. Bibcode:2017AJ....153..147B. doi:10.3847/1538-3881/aa5e4d.
    6. Jacobson, B.; Brozović, M.; Gladman, B.; Alexandersen, M.; Nicholson, P. D.; Veillet, C. (28 September 2012). "Irregular Satellites of the Outer Planets: Orbital Uncertainties and Astrometric Recoveries in 2009–2011". The Astronomical Journal. 144 (5): 132. Bibcode:2012AJ....144..132J. doi:10.1088/0004-6256/144/5/132.
    7. Sheppard, Scott S. (2017). "New Moons of Jupiter Announced in 2017". home.dtm.ciw.edu. Retrieved 27 June 2017. We likely have all of the lost moons in our new observations from 2017, but to link them back to the remaining lost 2003 objects requires more observations a year later to confirm the linkages, which will not happen until early 2018. ... There are likely a few more new moons as well in our 2017 observations, but we need to reobserve them in 2018 to determine which of the discoveries are new and which are lost 2003 moons.
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