| 词条 | Calypso (moon) | |||
| 释义 |
There is also an asteroid called 53 Kalypso.{{Infobox planet | name = Calypso | image = N00151485 Calypso crop.jpg | caption = Calypso image from Cassini (February 13, 2010) | discoverer =
| discovered = March 13, 1980 | semimajor = {{val|294619|u=km}} | eccentricity = 0.000 | period = {{val|1.887802|u=d}} | inclination = 1.56° (to Saturn's equator) | satellite_of = Saturn | dimensions = 30.2 × 23 × 14 km {{sfn|Thomas|2010}} | mean_radius = {{val|10.7|0.7|u=km}} {{sfn|Thomas|2010}} | rotation = synchronous | axial_tilt = zero | albedo = {{val|1.34|0.10}} {{nowrap | (geometric) {{sfn|Verbiscer French et al.|2007}} }} | adjectives = Calypsonian }} Calypso ({{IPAc-en|k|ə|ˈ|l|ɪ|p|s|oʊ}} {{respell|kə|LIP|soh}}; {{lang-el|Καλυψώ}}) is a moon of Saturn. It was discovered in 1980, from ground-based observations, by Dan Pascu, P. Kenneth Seidelmann, William A. Baum, and Douglas G. Currie, and was provisionally designated {{nowrap|S/1980 S 25}} (the 25th satellite of Saturn discovered in 1980).{{sfn|IAUC 3496}} Several other apparitions of it were recorded in the following months: {{nowrap|S/1980 S 29}}, {{nowrap|S/1980 S 30}},{{sfn|IAUC 3549}} {{nowrap|S/1980 S 32}},{{sfn|IAUC 3605}} and {{nowrap|S/1981 S 2}}.{{sfn|IAUC 3593}} In 1983 it was officially named after Calypso of Greek mythology.{{efn|name=mythology}} It is also designated as {{nowrap|Saturn XIV}} or Tethys C. Calypso is co-orbital with the moon Tethys, and resides in Tethys' trailing Lagrangian point ({{L5}}), 60 degrees behind Tethys. This relationship was first identified by Seidelmann Harrington et al. 1981}}|Seidelmann et al. in 1981.{{sfn|Seidelmann Harrington et al. 1981}} The moon Telesto resides in the other (leading) Lagrangian point of Tethys, 60 degrees in the other direction from Tethys. Calypso and Telesto have been termed "Tethys trojans", by analogy to the trojan asteroids, and are half of the four presently known trojan moons. Like many other small Saturnian moons and small asteroids, Calypso is irregularly shaped, has overlapping large craters, and appears to also have loose surface material capable of smoothing the craters' appearance. Its surface is one of the most reflective (at visual wavelengths) in the Solar System, with a visual geometric albedo of 1.34.{{sfn|Verbiscer French et al.|2007}} This very high albedo is the result of the sandblasting of particles from Saturn's E-ring, a faint ring composed of small, water-ice particles generated by Enceladus' south polar geysers.{{sfn|Mason|2010}} GallerySee also
ReferencesNotes{{notes| notes ={{efn | name = mythology | Transactions of the International Astronomical Union, Vol. XVIIIA, 1982 (confirms Janus, names Epimetheus, Telesto, Calypso) (mentioned in IAUC 3872}}|IAUC 3872: Satellites of Jupiter and Saturn, September 30, 1983) }} }}Citations }}Sources
| last = Marsden | first = Brian G. | title = Satellites of Saturn | date = July 31, 1980 | format = discovery | journal = IAU Circular | volume = 3496 | url = http://www.cbat.eps.harvard.edu/iauc/03400/03496.html | accessdate = 2011-12-23 | ref = {{sfnRef|IAUC 3496}}
| last = Marsden | first = Brian G. | title = Satellites of Saturn | date = December 11, 1980 | journal = IAU Circular | volume = 3549 | url = http://www.cbat.eps.harvard.edu/iauc/03500/03549.html | accessdate = 2011-12-23 | ref = {{sfnRef|IAUC 3549}}
| last = Marsden | first = Brian G. | title = Satellites of Saturn | date = April 16, 1981 | journal = IAU Circular | volume = 3593 | url = http://www.cbat.eps.harvard.edu/iauc/03500/03593.html | accessdate = 2011-12-23 | ref = {{sfnRef|IAUC 3593}}
| last = Marsden | first = Brian G. | title = Satellites of Saturn | date = May 18, 1981 | journal = IAU Circular | volume = 3605 | url = http://www.cbat.eps.harvard.edu/iauc/03600/03605.html | accessdate = 2011-12-23 | ref = {{sfnRef|IAUC 3605}}
|last=Marsden |first=Brian G. |title=Satellites of Jupiter and Saturn |date=September 30, 1983 |journal=IAU Circular |volume=3872 |url=http://www.cbat.eps.harvard.edu/iauc/03800/03872.html |accessdate=2011-12-23 |ref={{sfnRef|IAUC 3872}} |deadurl=yes |archiveurl=https://web.archive.org/web/20110725035059/http://www.cbat.eps.harvard.edu/iauc/03800/03872.html |archivedate=2011-07-25 |df= }}
| last = Mason | first = Betsy | date = February 15, 2010 | title = New Close-Ups of Saturn's Moons Mimas and Calypso | work = wired.com | publisher = Condé Nast Digital | url = https://www.wired.com/wiredscience/2010/02/gallery-mimas/ | accessdate = 2011-12-23 | ref = harv
External links{{Commons category|Calypso (moon)|Calypso}}{{Spoken Wikipedia|Calypso (moon).ogg|February 15, 2010}}
3 : Astronomical objects discovered in 1980|Moons of Saturn|Trojan moons |
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