File:Mneme_Discovery_Image.jpg · Wikimedia Commons · See Wikimedia Commons
Mneme is a small moon of Jupiter that orbits the giant planet in space. It matters because studying the moons around Jupiter helps scientists understand how planetary systems form and evolve.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Diameter
- 2
- Mass
- 15
- Orbital period
- 620.04
Show 11 more facts
- provisional designation
- S/2003 J 21
- time of discovery or invention
- 2003-02-09
- albedo
- 0.04
- orbital eccentricity
- 0.227
- semi-major axis of an orbit
- 21129787
- apparent magnitude
- 23.3
- surface gravity
- 0.00081
- orbital inclination
- 148.635
- name
- S/2003 J 21
- Commons category
- Mneme (moon)
- IPA transcription
- ˈmneːmə
via Wikidata · CC0
~1 min read
Article
Mneme /ˈniːmiː/, also known as Jupiter XL, is a retrograde irregular satellite of Jupiter. It was discovered by teams of astronomers led by Brett J. Gladman and Scott S. Sheppard in 2003, and was provisionally designated S/2003 J 21. Mneme has a 15 year observation arc and has not been observed since 2017.
Mneme is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 21,427,000 kilometres in 640.769 days, at an inclination of 149° to the ecliptic (148° to Jupiter's equator) with an eccentricity of 0.2214. Its average orbital speed is 2.43 km/s.