Astronomy:Herse (moon)
| Discovery | |
|---|---|
| Discovered by | Brett J. Gladman John J. Kavelaars Jean-Marc Petit Lynne Allen |
| Discovery date | 2003 |
| Designations | |
Designation | Jupiter L |
| Pronunciation | /ˈhɜːrsiː/ |
| Named after | Ἕρση Hersē |
| S/2003 J 17 | |
| Adjectives | Hersean /hɜːrˈsiːən/ |
| Orbital characteristics [1] | |
| 23097000 km | |
| Eccentricity | 0.200 |
| Orbital period | −715.4 days |
| Mean anomaly | 41.90° |
| Inclination | 164.2° |
| Longitude of ascending node | 329.0° |
| 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] Ersa (Jupiter LXXI) 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 , 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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