Arche (moon)

Arche
	Discovery image of Arche by the University of Hawaii telescope in October 2002
Discovery
Discovered by	Scott S. Sheppard
Discovery site	Mauna Kea Obs.
Discovery date	31 October 2002
Designations
Designation	Jupiter XLIII
Pronunciation	/ˈɑːrkiː/
Named after	Αρχή Archē
Alternative names	S/2002 J 1
Adjectives	Archean /ɑːrˈkiːən/
Orbital characteristics
Semi-major axis	22931000 km
Eccentricity	0.259
Orbital period (sidereal)	−723.9 days
Mean anomaly	126.7°
Inclination	165.0°
Longitude of ascending node	350.7°
Argument of perihelion	161.1°
Satellite of	Jupiter
Group	Carme group
Physical characteristics
Mean diameter	3 km
Apparent magnitude	22.8

Arche /ˈɑːrkiː/, also known as Jupiter XLIII, is a moon of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard on 31 October 2002, and received the temporary designation S/2002 J 1.^[2]^[3]

Arche is about 3 kilometres in diameter, and orbits Jupiter at an average distance of 23,717,000 km in 746.185 days, at an inclination of 165° to the ecliptic (162° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.149.

It was named in 2005 after Arche, whom some Greek writers described as one of the four original Muses, an addition to the earlier three (Aoede, Melete, and Mneme).^[4]

Arche 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°.

References

^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
^ IAUC 8035: S/2002 J 1 Archived 2006-04-08 at the Wayback Machine 2002 December 18 (discovery)
^ MPEC 2002-Y22: S/2002 J 1 2002 December 18 (discovery and ephemeris)
^ IAUC 8502: Satellites of Jupiter 2005 March 30 (naming the moon)

[1] S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line

[2] IAUC 8035: S/2002 J 1 Archived 2006-04-08 at the Wayback Machine 2002 December 18 (discovery)

[3] MPEC 2002-Y22: S/2002 J 1 2002 December 18 (discovery and ephemeris)

[4] IAUC 8502: Satellites of Jupiter 2005 March 30 (naming the moon)

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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
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