Herse (moon)

Herse
Provisional or systematic name	S / 2003 J 17
Central body	Jupiter
Properties of the orbit
Major semi-axis	22,983,000 km
Periapsis	17,511,000 km
Apoapsis	28,455,000 km
eccentricity	0.238
Orbit inclination	164.92 °
Orbital time	714.51 d
Mean orbital velocity	2.34 km / s
Physical Properties
Albedo	0.04
Apparent brightness	23.4 mag
Medium diameter	≈ 2 km
Dimensions	≈ 1.5 × 10 13 kg
Medium density	≈ 2.6 g / cm 3
Acceleration of gravity on the surface	≈ 0 m / s 2
Escape speed	≈ 0 m / s
discovery
Explorer	IFA Hawaii
Date of discovery	February 8, 2003

Herse (also Jupiter L) is one of the smaller moons of the planet Jupiter .

discovery

Herse was discovered by astronomers at the University of Hawaii on February 6, 2003 . It was initially given the provisional designation S / 2003 J 17 and was officially named after Herse on November 9, 2009 , the daughter of King Kekrops from Greek mythology .

Orbit data

Herse orbits Jupiter at an average distance of 22,992,000 km in 714 days, 11 hours and 17 minutes. The orbit has an eccentricity of 0.2378. With an inclination of 164.917 ° to the ecliptic , the orbit is retrograde , i.e. that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbital properties, Herse is assigned to the Carme Group , named after the Jupiter moon Carme .

Physical data

Herse has a diameter of about 2 km. Their density is estimated at 2.6 g / cm³. It is presumably composed mainly of silicate rock and has a very dark surface with an albedo of 0.04, i.e. that is, only 4% of the incident sunlight is reflected.

Web links

• MPEC 2003-G19: S / 2003 J 17 April 3, 2003 (discovery)
• IAUC 8116: Satellites of Jupiter and Saturn April 11, 2003 (discovery)
• MPEC 2009-S76: S / 2003 S 17 September 24, 2009 (rediscovery)
• IAUC 9094: Satellite of Jupiter  (currently still subject to registration) November 11, 2009 (designation)

before	Jupiter moons	after that
Kore	Herse	S / 2010 J 1