Herse (moon)

Herse
Discovery
Discovered by	Scott Sheppard et al.
Discovery date	2003
Designations
Designation	Jupiter L
Pronunciation	/ˈhɜːrsiː/
Named after	Ἕρση Hersē
Alternative names	S/2003 J 17
Adjectives	Hersean /hɜːrˈsiːən/
Orbital characteristics [1]
Semi-major axis	23097000 km
Eccentricity	0.200
Orbital period	−715.4 days
Mean anomaly	41.90°
Inclination	164.2°
Longitude of ascending node	329.0°
Argument of perihelion	355.7°
Satellite of	Jupiter
Group	Carme group
Physical characteristics
Mean diameter	2 km
Apparent magnitude	23.4

Herse /ˈhɜːrsiː/, or Jupiter L, previously known by its provisional designation of S/2003 J 17, is a natural satellite of Jupiter. It was discovered on 8 February 2003 by the astronomers Brett J. Gladman, John J. Kavelaars, Jean-Marc Petit, and Lynne Allen and also by a team of astronomers at the University of Hawaii.[2][3] It was named after Herse 'dew', by some accounts a daughter of Zeus and Selene the moon in Greek mythology,[4] on 11 November 2009.[5][6] Jupiter LXXI Ersa is also named for the same mythological figure.

Herse is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 22,134,000 km in 672.752 days, at a mean inclination of 165° to the ecliptic, in a retrograde direction and with a mean eccentricity of 0.2493.[7]

It is a member of 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
Daniel W. E. Green, IAUC 8116: Satellites of Jupiter and Saturn 2003 April 11 (discovery)
Brian G. Marsden, MPEC 2003-G19: S/2003 J 17 2003 April 3 (discovery and ephemeris)
Keightley, p. 55; Hard, p. 46; Alcman, Fragment 57.
Jennifer S. Blue, L Named Herse Archived 2013-05-12 at the Wayback Machine, 2009 November 9
Jennifer S. Blue, IAUC 9094: Satellite of Jupiter (subscription required) 2009 November 11 (naming)
Planetary Satellite Mean Orbital Parameters, JPL

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

[2] Daniel W. E. Green, IAUC 8116: Satellites of Jupiter and Saturn 2003 April 11 (discovery)

[3] Brian G. Marsden, MPEC 2003-G19: S/2003 J 17 2003 April 3 (discovery and ephemeris)

[4] Keightley, p. 55; Hard, p. 46; Alcman, Fragment 57.

[5] Jennifer S. Blue, L Named Herse Archived 2013-05-12 at the Wayback Machine, 2009 November 9

[6] Jennifer S. Blue, IAUC 9094: Satellite of Jupiter (subscription required) 2009 November 11 (naming)

[7] Planetary Satellite Mean Orbital Parameters, JPL

Moons of Jupiter
Listed in approximately increasing distance from Jupiter. Provisional designations in italics.
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto group	Themisto
Himalia group	Leda Himalia Ersa Pandia Lysithea Elara Dia
Carpo group	Carpo
Valetudo group	Valetudo
Ananke group	S/2003 J 12(?) Euporie Eupheme Jupiter LV Jupiter LII Thelxinoe Euanthe Helike Orthosie Jupiter LXVIII Jupiter LIV Jupiter LXIV Iocaste S/2003 J 16(?) Praxidike Harpalyke Mneme Hermippe Thyone Jupiter LXX Ananke
Carme group	Jupiter LXXII Herse Aitne Kale Taygete Jupiter LXI Chaldene S/2003 J 10(?) Erinome Kallichore Jupiter LXVI Jupiter LXIX Kalyke Carme Jupiter LXIII Pasithee Jupiter LI Eukelade Arche Isonoe S/2003 J 9(?) Eirene
Pasiphae group	Jupiter LXVII Philophrosyne S/2003 J 23(?) Aoede Callirrhoe Eurydome Kore Cyllene Jupiter LVI Jupiter LIX S/2003 J 4(?) Pasiphae Hegemone Sinope Sponde Autonoe Megaclite S/2003 J 2(?)
See also	Rings of Jupiter Jupiter's moons in fiction
Category