S/2003 J 9

S/2003 J 9 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 2003.[2][3]

S/2003 J 9
Discovery
Discovered byScott S. Sheppard
Discovery date2003 March 7
Orbital characteristics [1]
22441680 km
Eccentricity0.269
−683.0 days
Inclination164.5°
Satellite ofJupiter
GroupCarme group?
Physical characteristics
Mean diameter
1 km
23.7

    S/2003 J 9 is about 1 kilometre in diameter, and orbits Jupiter at an average distance of 23,858 Mm in 752.839 days, at an inclination of 165° to the ecliptic (165° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.276.

    It belongs to the Carme group, made up of irregular retrograde moons orbiting Jupiter at a distance ranging between 23 and 24 Gm and at an inclination of about 165°.

    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 8089: Satellites of Jupiter 7 March 2003 (discovery)
    3. MPEC 2003-E29: S/2003 J 9, 2003 J 10, 2003 J 11, 2003 J 12; S/2003 J 1, 2003 J 6 3 April 2003 (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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