Calypso (moon)

Template:Short description Template:Distinguish {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = Calypso | image = {{#invoke:InfoboxImage|InfoboxImage|image=Calypso N1644755236 1.jpg|upright={{#if:||1.1}}|alt=}} | caption = Calypso image from Cassini
(February 13, 2010) | headerstyle = {{#if:|background-color:|background-color:#E0CCFF}} | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery

| header10 = {{#if:|Designations|Designations}}

| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}

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| header60 = Proper orbital elements

| label61 = Template:Longitem | data61 = {{#if: |{{{p_semimajor}}} AU}} | label62 = Template:Longitem | data62 = | label63 = Template:Longitem | data63 = | label64 = Template:Longitem | data64 = {{#if: |{{{p_mean_motion}}} deg Template:\yr}} | label65 = Template:Longitem | data65 = {{#if:|{{#expr:360/1 round 5}} yr
({{#expr:365.25*360/1 round 3}} d) }} | label66 = Template:Longitem | data66 = {{#if:|{{{perihelion_rate}}} arcsec Template:\yr }} | label67 = Template:Longitem | data67 = {{#if:|{{{node_rate}}} arcsec Template:\yr}}

| header70 = Template:Anchor{{#if:| Physical characteristics|Physical characteristics}}

| label71 = Dimensions | data71 = Template:Val km
(± Template:Val km)Template:Sfn Template:Rp | label72 = Template:Longitem | data72 = Template:Val Template:Sfn Template:Rp | label73 = Template:Longitem | data73 = | label74 = Template:Longitem | data74 = | label75 = Template:Longitem | data75 = | label76 = Flattening | data76 = | label77 = Circumference | data77 = | label78 = Template:Longitem | data78 = | label79 = Volume | data79 = Template:Val Template:Efn | label80 = Mass | data80 = Template:Val (assumed; unmeasured)Template:Efn | label81 = Template:Longitem | data81 = Template:Val (assumed; unmeasured)Template:Sfn Template:Rp | label82 = Template:Longitem | data82 = ≈ Template:Val Template:Sfn Template:Rp | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = ≈ Template:V2 km/s at longest axis
to ≈ Template:V2 km/s at poles | label85 = Template:Longitem | data85 = synchronous | label86 = Template:Longitem | data86 = | label87 = Template:Longitem | data87 = | label88 = Template:Longitem | data88 = zero | label89 = Template:Longitem | data89 = | label90 = Template:Longitem | data90 = | label91 = Template:Longitem | data91 = | label92 = Template:Longitem | data92 = | label93 = {{#if: |Template:Longitem |Albedo}} | data93 = Template:Val Template:Nowrap | label94 = Temperature | data94 =

| data100 = {{#if:|

Surface temp.	min	mean	max
{{{temp_name1}}}
{{{temp_name2}}}
{{{temp_name3}}}
{{{temp_name4}}}

}}

| header110 = Atmosphere

| below = {{#if:||Template:Reflist }}

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Calypso 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 Template:Nowrap (the 25th satellite of Saturn discovered in 1980).Template:Sfn Several other apparitions of it were recorded in the following months: Template:Nowrap, Template:Nowrap,Template:Sfn Template:Nowrap,Template:Sfn and Template:Nowrap.Template:Sfn In 1983 it was officially named after Calypso of Greek mythology.Template:Efn It is also designated Template:Nowrap or Tethys C.

Calypso is co-orbital with the moon Tethys, and resides in Tethys's trailing Lagrangian point (Template:L5), 60 degrees behind Tethys. This relationship was first identified by [[#Template:SfnRef|Seidelmann et al.]] in 1981.Template:Sfn 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.Template:Sfn 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's south polar geysers.Template:Sfn

GalleryEdit

Calypso crop resize sharp.jpg

Another February 13, 2010 image showing flow-like albedo features
Calypso image PIA07633.jpg

Cassini image from September 23, 2005
Calypso - Voyager 2.jpg

Calypso as seen by Voyager 2 (August 1981)

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External linksEdit

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Template:Moons of Saturn Template:Tethys (moon) Template:Saturn Template:Authority control