Autonoe (moon)

Autonoe

Discovery images of Autonoe by the Canada-France-Hawaii Telescope in December 2001
Discovery[1]
Discovered by	Scott S. Sheppard et al.
Discovery site	Mauna Kea Obs.
Discovery date	10 December 2001
Designations
Designation	Jupiter XXVIII
Pronunciation	/ɔːˈtɒnoʊ.iː/[2]
Named after	Αυτονόη Aytonoē
Alternative names	S/2001 J 1
Adjectives	Autonoean /ˌɔːtənoʊˈiːən/
Orbital characteristics [3]
Semi-major axis	23039000 km
Eccentricity	0.334
Orbital period (sidereal)	−719.01 days[4]
Inclination	152.9°
Satellite of	Jupiter
Group	Pasiphae group
Physical characteristics
Mean diameter	4 km
Spectral type	B–V = 0.72 ± 0.03, V–R = 0.51 ± 0.02[5]
Apparent magnitude	22.0
Absolute magnitude (H)	15.5[4]

Autonoe /ɔːˈtɒnoʊ.iː/, also known as Jupiter XXVIII, is a natural satellite of Jupiter.

Autonoe was discovered 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 1.^[6][1][7]

Autonoe is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 24,264,000 km in 719.01 days. It orbits at an inclination of 151° to the ecliptic (150° to Jupiter's equator) in a retrograde direction and with an eccentricity of 0.369.

It 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°.

Autonoe was named in August 2003 after the Greek mythological figure Autonoë, conquest of Zeus (Jupiter),^[8] mother of the Charites (Gracies), according to some authors.^[9]

See also

• Moons of Jupiter

References

1. MPEC 2002-J54: Eleven New Satellites of Jupiter 2002 May 15 (discovery and ephemeris)
2. Noah Webster (1884) A Practical Dictionary of the English Language
3. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
4. "M.P.C. 115890" (PDF). Minor Planet Circular. Minor Planet Center. 27 August 2019.
5. Graykowski, Ariel; Jewitt, David (2018-04-05). "Colors and Shapes of the Irregular Planetary Satellites". The Astronomical Journal. 155 (4): 184. arXiv:1803.01907. doi:10.3847/1538-3881/aab49b. ISSN 1538-3881.
6. IAUC 7900: Satellites of Jupiter 2002 May 16 (discovery)
7. MPEC 2002-V03: S/2001 J 1 2002 November 1 (revised ephemeris)
8. IAU Website: Satellites of Jupiter, Saturn and Uranus Archived October 12, 2007, at the Wayback Machine
9. USGS Astrogeology: Gazetteer of Planetary Nomenclature - Planetary Body Names and Discoverers