Astronomy:Eukelade
 Images of Eukelade taken by Scott Sheppard on 4 March 2003 | |
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard et al. |
| Discovery date | 2003 |
| Designations | |
Designation | Jupiter XLVII |
| Pronunciation | /juːˈkɛlədiː/ |
| Named after | Ευκελάδη Eykeladē |
| S/2003 J 1 | |
| Adjectives | Eukeladean /ˌjuːkɪləˈdiːən/ |
| Orbital characteristics[2] | |
| Epoch 2026-01-01 | |
| |{{{apsis}}}|apsis}} | 14.3 million km |
| |{{{apsis}}}|apsis}} | 30.7 million km (2026-Jan-17)[1] |
| 22.5 million km | |
| Eccentricity | 0.363 |
| Orbital period | −689.2 days |
| Mean anomaly | 170° |
| Inclination | 165.2° |
| Longitude of ascending node | 206.3° |
| 80.3° | |
| Satellite of | Jupiter |
| Group | Carme group |
| Physical characteristics | |
| Mean diameter | 4 km[3] |
Spectral type | B–V = 0.79 ± 0.07, V–R = 0.50 ± 0.07[4] |
| Apparent magnitude | 22.6 |
| Absolute magnitude (H) | 15.9[5] |
Eukelade /juːˈkɛlədiː/, also known as Jupiter XLVII, is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaiʻi led by Scott S. Sheppard in 2003, and received the temporary designation S/2003 J 1.[6][7][8]
Eukelade is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 22.5 million km in 689 days, at an inclination of 165° to the ecliptic, in a retrograde direction and with an eccentricity of 0.363.[2] Eukelade came to apojove (farthest distance from Jupiter) on 17 January 2026 when it was 0.205 astronomical unit|AU (30.7 million km; 19.1 million mi) from Jupiter.[1]
It was named in March 2005 after Eucelade - according to John Tzetzes, listed by some (unnamed) Greek writers as one of the Muses.[9] The name ends in an "e" because the orbit is retrograde.
Eukelade belongs to the Carme group, made up of irregular retrograde moons orbiting Jupiter at a distance ranging between 23 and 24 million km and at an inclination of about 165°.
References
- ↑ 1.0 1.1 "Apojove on 2026-Jan-17". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27Eukelade%27&START_TIME=%272026-01-17%2006:00%27&STOP_TIME=%272026-01-18%27&STEP_SIZE=%271%20hour%27&QUANTITIES=%2720%27&CENTER=%27@599%27. Retrieved 2025-12-22.
- ↑ 2.0 2.1 Horizons output. "Jovian Osculating Orbital Elements for Eukelade (547)". https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27Eukelade%27&TABLE_TYPE=%27ELEMENTS%27&START_TIME=%272026-01-01%27&STOP_TIME=%272026-01-02%27&STEP_SIZE=%271%20year%27&CENTER=%27@599%27&OUT_UNITS=%27KM-D%27.
- ↑ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
- ↑ Graykowski, Ariel; Jewitt, David (2018-04-05). "Colors and Shapes of the Irregular Planetary Satellites" (in en). The Astronomical Journal 155 (4): 184. doi:10.3847/1538-3881/aab49b. ISSN 1538-3881. https://iopscience.iop.org/article/10.3847/1538-3881/aab49b.
- ↑ "M.P.C. 127088". Minor Planet Circular. Minor Planet Center. 17 November 2020. https://minorplanetcenter.net/iau/ECS/MPCArchive/2020/MPC_20201117.pdf.
- ↑ IAUC 8087: Satellites of Jupiter 2003 March 4 (discovery)
- ↑ MPEC 2003-E11: S/2003 J 1, 2003 J 2, 2003 J 3, 2003 J 4, 2003 J 5, 2003 J 6, 2003 J 7 2003 March 4 (discovery and ephemeris)
- ↑ MPEC 2003-E29: S/2003 J 9, 2003 J 10, 2003 J 11, 2003 J 12; S/2003 J 1, 2003 J 6 2003 April 3 (revised ephemeris)
- ↑ * Marta Cardin, Olga Tribulato: Enumerating the Muses: Tzetzes in Hes. Op. 1 and the Parody of Catalogic Poetry in Epicharmus. In: Marco Ercoles, Lara Pagani, Filippomaria Pontani, Giuseppe Ucciardello: Approaches to Greek Poetry: Homer, Hesiod, Pindar, and Aeschylus in Ancient Exegesis (= Trends in Classics. Supplementary Volumes 73). De Gruyter, Berlin/Boston 2019, pages 161–192; here page 171.
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