Astronomy:Lysithea (moon)
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Short description: Outer moon of Jupiter
 Near-infrared photograph of Lysithea (center) by the 2MASS survey | |
| Discovery [1] | |
|---|---|
| Discovered by | Seth B. Nicholson |
| Discovery site | Mt. Wilson Observatory |
| Discovery date | 6 July 1938 |
| Designations | |
Designation | Jupiter X |
| Pronunciation | /laɪˈsɪθiə/[2][3] |
| Named after | Λυσιθέα Lysithea |
| Adjectives | Lysithean /laɪˈsɪθiən/[4] |
| Orbital characteristics [5] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Observation arc | 79.87 yr (29,171 days) |
| 0.0782144 astronomical unit|AU (11,700,710 km) | |
| Eccentricity | 0.1478734 |
| Orbital period | +258.57 d |
| Mean anomaly | 27.18992° |
| Mean motion | 1° 23m 32.227s / day |
| Inclination | 26.29254° (to ecliptic) |
| Longitude of ascending node | 343.46495° |
| 94.80010° | |
| Satellite of | Jupiter |
| Group | Himalia group |
| Physical characteristics | |
| Mean diameter | 42.2±0.7 km (WISE)[6] 42.2±3 km (occultation)[7](p6) |
| Rotation period | 12.78±0.10 h[8] |
| Albedo | 0.036±0.006[6] |
Spectral type | C/P[6] |
| Apparent magnitude | 18.2[9] |
| Absolute magnitude (H) | 11.2[5] |
Lysithea /laɪˈsɪθiə/ is a prograde irregular satellite of Jupiter. It was discovered by Seth Barnes Nicholson in 1938 at Mount Wilson Observatory[1] and is named after the mythological Lysithea, daughter of Oceanus and one of Zeus' lovers.[10]
Lysithea did not receive its present name until 1975; before then, it was simply known as Jupiter X. It was sometimes called "Demeter"[11] from 1955 to 1975.
It belongs to the Himalia group, moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 28.3°.[12] Its orbital elements are as of January 2000. They are continuously changing due to solar and planetary perturbations. It is gray in color (B−V=0.72, V−R=0.36, V−I=0.74) and intermediate between C-type and P-type asteroids.[13][6]
Lysithea observed by the Wide-field Infrared Survey Explorer (WISE) spacecraft in 2014
See also
- Irregular satellites
- Jupiter's moons in fiction
References
- ↑ 1.0 1.1 Nicholson, S. B. (October 1938). "Two New Satellites of Jupiter". Publications of the Astronomical Society of the Pacific 50 (297): 292–293. doi:10.1086/124963. Bibcode: 1938PASP...50..292N. http://adsabs.harvard.edu//full/seri/PASP./0050//0000292.000.html.
- ↑ "Lysithea". Dictionary.com Unabridged. Random House. https://www.dictionary.com/browse/Lysithea.
- ↑ Cf. also 'Lysithous' in Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ Yenne (1987) The Atlas of the Solar System.
- ↑ 5.0 5.1 "M.P.C. 115890". Minor Planet Circular. Minor Planet Center. 27 August 2019. https://minorplanetcenter.net/iau/ECS/MPCArchive/2019/MPC_20190827.pdf.
- ↑ 6.0 6.1 6.2 6.3 Grav, T.Expression error: Unrecognized word "etal". (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn". The Astrophysical Journal 809 (1): 9. doi:10.1088/0004-637X/809/1/3. 3. Bibcode: 2015ApJ...809....3G. https://authors.library.caltech.edu/61254/1/Grav_2015.pdf.
- ↑ Gomes-Júnior, A. R. (April 2021). "The Irregular Satellites of the Giant Planets". Journal for Occultation Astronomy 11 (2): 3–9. Bibcode: 2021JOA....11b...3G. https://iota-es.de/JOA/JOA2021_2.pdf.
- ↑ Luu, Jane (September 1991). "CCD photometry and spectroscopy of the outer Jovian satellites". Astronomical Journal 102: 1213–1225. doi:10.1086/115949. ISSN 0004-6256. Bibcode: 1991AJ....102.1213L.
- ↑ Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. https://sites.google.com/carnegiescience.edu/sheppard/moons/jupitermoons.
- ↑ Marsden, Brian G. (1975-10-07). "Satellites of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/02800/02846.html.
- ↑ Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-13-478107-4.
- ↑ Jacobson, R.A. (2000). "The orbits of outer Jovian satellites". Astronomical Journal 120 (5): 2679–2686. doi:10.1086/316817. Bibcode: 2000AJ....120.2679J. https://trs.jpl.nasa.gov/bitstream/2014/15175/1/00-1187.pdf.
- ↑ Grav, Tommy; Holman, M. J.; Gladman, B. J.; Aksnes, K. (2003). "Photometric survey of the irregular satellites". Icarus 166 (1): 33–45. doi:10.1016/j.icarus.2003.07.005. Bibcode: 2003Icar..166...33G.
External links
- Lysithea: Overview by NASA's Solar System Exploration
- David Jewitt pages
- Jupiter's Known Satellites (by Scott S. Sheppard)
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