Carpo (moon)

Carpo
	Artistic representation of Carpo, with Jupiter in the background
Discovery
Discovered by	Scott S. Sheppard et al.
Discovery date	2003
Orbital characteristics
Mean orbit radius	17.145 Gm
Eccentricity	0.4316
Orbital period (sidereal)	458.625 days
Inclination	56° to the ecliptic
Physical characteristics
Mean radius	~1.5 km

Carpo (/ˈkɑːrpoʊ/ KAR-poh; Greek: Καρπώ), also Jupiter XLVI, is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and was provisionally designated as S/2003 J 20^[2]^[3] until it received its name in early 2005.^[4]

Carpo is about 3 kilometres (1.9 miles) in diameter, and orbits Jupiter at an average distance of 17.145 Gm (just over ten million miles) in 458.625 days, at an inclination of 56° to the ecliptic (55° to Jupiter's equator), and with a high eccentricity of 0.4316. All of the moons further from Jupiter than Carpo are retrograde.

It was named in March 2005 after Carpo, one of the Horae, and a daughter of Zeus (Jupiter).

Like Themisto, this moon seems to be the lone member of a unique class, which makes it particularly interesting. The orbital inclination of satellites such as this one is limited by the Kozai effect, discovered by Yoshihide Kozai in 1962. This effect induces a periodic exchange between the inclination and eccentricity of the orbit; if the inclination is large enough, the eccentricity can in turn grow so large that the periapsis of the satellite (called the perizene in the case of moons of Jupiter) would be in the immediate vicinity of the Galilean moons (Io, Europa, Ganymede and Callisto). The satellite would eventually collide with one of these, or a close encounter would eject it altogether from the Jovian system. The periapsis precession period (P_w) is 6.8 million years long.^[1]

References

^ ^a ^b Jacobson, R. A. (2006) JUP262 (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved 2008-01-19.{{cite web}}: CS1 maint: numeric names: authors list (link)
^ Daniel W. E. Green (April 30, 2003). "IAUC 8125: S/2003 J 19 and S/2003 J 20". International Astronomical Union. Archived from the original on 2016-03-05. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
^ MPEC 2003-G67: S/2003 J 20 2003 April (discovery and ephemeris)
^ Daniel W. E. Green (March 30, 2005). "IAUC 8502: Satellites of Jupiter". International Astronomical Union.

External links

Jupiter's Known Satellites (by Scott S. Sheppard)

[JPL-1] Jacobson, R. A. (2006) JUP262 (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved 2008-01-19.{{cite web}}: CS1 maint: numeric names: authors list (link)

[2] Daniel W. E. Green (April 30, 2003). "IAUC 8125: S/2003 J 19 and S/2003 J 20". International Astronomical Union. Archived from the original on 2016-03-05. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)

[3] MPEC 2003-G67: S/2003 J 20 2003 April (discovery and ephemeris)

[4] Daniel W. E. Green (March 30, 2005). "IAUC 8502: Satellites of Jupiter". International Astronomical Union.

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[2]

[3]

[4]

v t e Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto	Themisto
Himalia group (9)	Leda Ersa S/2018 J 2 Himalia Pandia Lysithea Elara S/2011 J 3 Dia
Carpo group (2)	S/2018 J 4 Carpo
Valetudo	Valetudo
Ananke group (26)	Euporie Jupiter LV Eupheme S/2021 J 3 Jupiter LII Jupiter LIV Mneme Euanthe S/2003 J 16 Harpalyke Orthosie S/2022 J 3 Helike S/2021 J 2 Praxidike Jupiter LXIV S/2021 J 1 S/2003 J 12 Jupiter LXVIII Thelxinoe Thyone S/2003 J 2 Ananke Iocaste Hermippe Jupiter LXX
Carme group (30)	S/2022 J 1 S/2022 J 2 S/2016 J 3 Pasithee Jupiter LXIX S/2021 J 6 S/2003 J 24 Chaldene Jupiter LXIII Isonoe S/2021 J 4 Kallichore Erinome Kale Eirene Aitne Eukelade Arche Taygete Jupiter LXXII Carme Herse Jupiter LXI Jupiter LI S/2003 J 9 Jupiter LXVI Kalyke S/2018 J 3 S/2021 J 5 S/2003 J 10
Pasiphae group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphae Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
See also	Rings of Jupiter Jupiter's moons in fiction
Category