Hermippe /hɜːrˈmɪpiː/, also known as Jupiter XXX, is a natural satellite of Jupiter. It was discovered concurrently with Eurydome by a team of astronomers from the Institute for Astronomy of the University of Hawaii led by David Jewitt and Scott S. Sheppard and Jan Kleyna in 2001, and given the temporary designation S/2001 J 3.[7][1]
 Discovery image of Hermippe by the Canada-France-Hawaii Telescope in December 2001 | |
| Discovery [1] | |
|---|---|
| Discovered by | Scott S. Sheppard David C. Jewitt Jan T. Kleyna |
| Discovery site | Mauna Kea Observatory |
| Discovery date | 9 December 2001 |
| Designations | |
Designation | Jupiter XXX |
| Pronunciation | /hɜːrˈmɪpiː/[2] |
Named after | Ἑρμίππη Hermippē |
| S/2001 J 3 | |
| Adjectives | Hermippean /hɜːrmɪˈpiːən/ |
| Orbital characteristics [3] | |
| Epoch 17 December 2020 (JD 2459200.5) | |
| Observation arc | 15.29 yr (5,586 days) |
| 0.1381428 AU (20,665,870 km) | |
| Eccentricity | 0.1982520 |
| –606.93 d | |
| 169.67605° | |
| 0° 35m 35.347s / day | |
| Inclination | 146.76001° (to ecliptic) |
| 37.24213° | |
| 356.27211° | |
| Satellite of | Jupiter |
| Group | Ananke group |
| Physical characteristics[4] | |
| 4 km | |
| Albedo | 0.04 (assumed) |
Spectral type | B–V = 0.73 ± 0.05, V–R = 0.49 ± 0.04[5] |
| 22.1[6] | |
| 15.5[3] | |
Hermippe is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 21,500,000 kilometers in about 630 days, at an inclination of 151° to the ecliptic (149° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.2290.
It was named in August 2003 by the IAU, after Hermippe, a lover of Zeus (Jupiter).[8]
Hermippe belongs to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 gigametres (0.152 astronomical units), at inclinations of roughly 150°.
References
edit- ^ a b MPEC 2002-J54: Eleven New Satellites of Jupiter May 15, 2002 (discovery and ephemeris)
- ^ cf. Hermippus in Noah Webster (1884) A Practical Dictionary of the English Language
- ^ a b "M.P.C. 127087" (PDF). Minor Planet Circular. Minor Planet Center. 17 November 2020.
- ^ "Planetary Satellite Physical Parameters". Jet Propulsion Laboratory. 19 February 2015. Retrieved 26 November 2020.
- ^ Graykowski, Ariel; Jewitt, David (5 April 2018). "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.
- ^ Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. Retrieved 26 November 2020.
- ^ IAUC 7900: Satellites of Jupiter May 16, 2002 (discovery)
- ^ IAUC 8177: Satellites of Jupiter, Saturn, Uranus Archived 2008-07-09 at the Wayback Machine 2003 August (naming the moon)