Eurydome (moon)

Eurydome

Discovery images of Eurydome by the Canada-France-Hawaii Telescope in December 2001
Discovery [1]
Discovered by	Scott S. Sheppard David C. Jewitt Yanga R. Fernandez
Discovery site	Mauna Kea Observatory
Discovery date	9 December 2001
Designations
Designation	Jupiter XXXII
Pronunciation	/jʊˈrɪdəmiː/
Named after	Ευρυδόμη Eyry̆domē
Alternative names	S/2001 J 4
Adjectives	Eurydomean /ˌjʊrɪdəˈmiːən/
Orbital characteristics [2]
Epoch 17 December 2020 (JD 2459200.5)
Observation arc	16.42 yr (5,998 days)
Semi-major axis	0.1551793 AU (23,214,490 km)
Eccentricity	0.2975371
Orbital period (sidereal)	–722.59 d
Mean anomaly	169.85622°
Mean motion	0° 29^m 53.536^s / day
Inclination	150.28897° (to ecliptic)
Longitude of ascending node	31.50527°
Argument of perihelion	306.06428°
Satellite of	Jupiter
Group	Pasiphae group
Physical characteristics[3]
Mean diameter	3 km
Albedo	0.04 (assumed)
Apparent magnitude	22.7[4]
Absolute magnitude (H)	16.2[2]

Eurydome /jʊˈrɪdəmiː/, also known as Jupiter XXXII, is a natural satellite of Jupiter. It was discovered concurrently with Hermippe by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2001, and given the temporary designation S/2001 J 4.^[5][1]

Eurydome is about 3 kilometres in diameter, and orbits Jupiter at an average distance of 23,231,000 km in 722.59 days, at an inclination of 149° to the ecliptic (147° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.3770.

It was named in August 2003 after Eurydome in Greek mythology, who is sometimes described as the mother of the Graces by Zeus (Jupiter).^[6]

Eurydome belongs to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 Gm, and with inclinations ranging between 144.5° and 158.3°.

Discovery image of Hermippe and Eurydome together, taken by the CFHT in December 2001

References

1. MPEC 2002-J54: Eleven New Satellites of Jupiter 2002 May (discovery and ephemeris)
2. "M.P.C. 127088" (PDF). Minor Planet Circular. Minor Planet Center. 17 November 2020.
3. "Planetary Satellite Physical Parameters". Jet Propulsion Laboratory. 19 February 2015. Retrieved 26 November 2020.
4. Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. Retrieved 26 November 2020.
5. IAUC 7900: Satellites of Jupiter 2002 May (discovery)
6. IAUC 8177: Satellites of Jupiter, Saturn, Uranus Archived July 9, 2008, at the Wayback Machine 2003 August (naming the moon)