Ersa (moon)

Ersa /ˈɜːrsə/, also Jupiter LXXI, originally known as S/2018 J 1, is an outer natural satellite of Jupiter. It was discovered by Scott S. Sheppard and his team in 2018, and was announced on July 17, 2018, via a Minor Planet Electronic Circular from the Minor Planet Center.[2] It is about 3 kilometres (2 mi) in diameter and has an orbit radius of around 11,483,000 kilometres (7,135,000 miles); its orbital inclination is about 30.61°.[3] It belongs to the Himalia group.

Ersa
Discovery
Discovered byScott S. Sheppard et al.
Discovery date2018
Designations
Designation
Jupiter LXXI
Pronunciation/ˈɜːrsə/
Named after
Ἔρσα Ersa
S/2018 J 1
Orbital characteristics [1]
11483000 km
Eccentricity0.094
+252.0 days
356.6°
Inclination30.61°
93.3°
346.7°
Satellite ofJupiter
GroupHimalia group
Physical characteristics
Mean diameter
3 km
22.9

    Name

    The moon was named in 2019 after Ersa, the Greek goddess of dew, daughter of Zeus and Selene: Jupiter L Herse is also named for this goddess.[4] The name was suggested in a naming contest held by the Carnegie Institute on Twitter where more than 20 tweets suggested that name, most significantly by users Aaron Quah (@8603103) who submitted the name first, StSauveur_MoonsProject (@StSauMoons) who are the 12th grade students of Saint Sauveur High School in Redon, France, the fifth grade at Hillside Traditional Academy in British Columbia, Canada (submitted on their behalf by @mrgrouchypants), and a 4-year-old child named Walter who sang a song about Ersa (submitted on his behalf by @Thoreson).[5][6]

    gollark: Biotechnology is improving.
    gollark: Not necessarily!
    gollark: So, if things are bad, delude yourself into thinking it's fine?
    gollark: And you cannot, in fact, do the same thing as everyone else if you have some thing stopping you doing the same thing as everyone else, that's... definitionally the case.
    gollark: ... well, you can't remove any problem.

    References
    1. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
    2. "MPEC 2018-O18 : S/2018 J 1". Minor Planet Center. International Astronomical Union. Retrieved 17 July 2018.
    3. Sheppard, Scott S. "JupiterMoons". carnegiescience.edu. sites.google.com. Retrieved 18 July 2018.
    4. https://planetarynames.wr.usgs.gov/Page/Planets
    5. "Naming Contest for Newly-discovered Moons of Jupiter". www.iau.org. Retrieved 27 August 2019.
    6. "Public Contest Successfully Finds Names For Jupiter's New Moons". www.iau.org. Retrieved 27 August 2019.


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