Key facts
- Discovered by
- Brett J. Gladman , John J. Kavelaars , Jean-Marc Petit , Lynne Allen
- Designation
- Jupiter L
- Pronunciation
- / ˈ h ɜːr s iː /
- Named after
- Ἕρση Hersē
- Alternative names
- S/2003 J 17
- Adjectives
- Hersean / h ɜːr ˈ s iː ə n /
- Observation arc
- 22 years, 2025-12-21 (last obs)
- Semi major axis
- 23 097 000 km
- Orbital period sidereal
- −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
- Mean diameter
- 2 km
- Absolute magnitude h
- 16.37 (45 obs)
via Wikipedia infobox
~1 min read
Encyclopedic overview
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. It was named after Herse 'dew', by some accounts a daughter of Zeus and Selene the moon in Greek mythology, on 11 November 2009. 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.
Excerpted from Wikipedia’s “Herse” article, available under the CC BY-SA 4.0 licence.