File Format: Full colour 1800x900 JPG file, 68K.
Map Type: Simple Cylindrical Projection.
Map Origin: Constructed by Björn Jónsson from Voyager data (JPL/NASA), with some artistic interpretation.
Map coverage: Full 360° wrap, full pole-to pole coverage.
Image coverage: Vertical edge: 0°. Horizontal edge: 90° N/S.

Equatorial Radius (1 km = 1 POV unit): 60,368 km (set sphere radius at 60368 km and scale <1,0.9,1> to reflect oblateness - polar radius is 54,362 km)

Average distance from primary (1 km = 1 POV unit): 1,430,850,000 km

NOTES: Saturn's ring system is very extensive and bright enough to be easily visible in a typical scene without enhancement. Their radii are shown below: 7

C ring (translucent, innermost): Inner radius 74,500 km; Outer radius 92,000 km.
Inner B ring (solid): Inner radius 92,000 km; Outer radius 98,390 km.
Outer B ring (solid): Inner radius 98,380 km; Outer radius 117,500 km.


(Cassini Division)


Inner A ring (solid): Inner radius 122,200; Outer radius 133,570 km


(Encke Division)


Outer A ring (translucent): Inner radius 133,895 km; Outer radius 136,800 km.
F ring (solid, outermost): Inner radius 140,210 km; Outer radius 140,460 km.

You should also set the rings at ambient 0 diffuse 1 (or more) so that they aren't illuminated if they are in Saturn's shadow. Note that the F ring should be braided, but I can't figure out how to do this in POVray - such braiding would only be visible on very high resolution renderings though. Also note that at high resolutions each wide (A, B, C) ring should contain many (thousands/millions) of individual ringlets - this would take too much time/processing power to render and would again only be visible in very high resolution images anyway.

I suggest using a union of discs with the following properties to render the rings - just cut and paste the text below into your POV code (don't forget to put Saturn at <0,0,0> though!):

union
{ //C ring (innermost, more translucent)
disc
{
<0, 0, 0> // center position
y, // normal vector
92000, // outer radius
74500 // optional hole radius
pigment {color red 0.99 green 0.88 blue 0.79 filter 0.6}
finish {ambient 0 diffuse 5}
}

//Inner B ring (translucent)
disc
{
<0, 0, 0> // center position
y, // normal vector
98390, // outer radius
92000 // optional hole radius
pigment {color red 0.99 green 0.88 blue 0.79 filter 0.2}
finish {ambient 0 diffuse 5}
}

//Outer B ring (solid, inside Cassini Division)
disc
{
<0, 0, 0> // center position
y, // normal vector
117500, // outer radius
98390 // optional hole radius
pigment {color red 0.99 green 0.88 blue 0.79 filter 0.05}
finish {ambient 0 diffuse 5}
}

//Inner A ring (between Cassini and Encke divisions)
disc
{
<0, 0, 0> // center position
y, // normal vector
133570, // outer radius
122200 // optional hole radius
pigment {color red 0.99 green 0.88 blue 0.79 filter 0.05}
finish {ambient 0 diffuse 5}
}

//Outer A ring (outside Encke division)
disc
{
<0, 0, 0> // center position
y, // normal vector
136800, // outer radius
133895 // optional hole radius
pigment {color red 0.99 green 0.88 blue 0.79 filter 0.2}
finish {ambient 0 diffuse 5}
}

//F ring (solid, outermost thin ring)
disc
{
<0, 0, 0> // center position
y, // normal vector
140460, // outer radius
140210 // optional hole radius
pigment {color red 0.99 green 0.88 blue 0.79 filter 0.05}
finish {ambient 0 diffuse 5}
}
} //end Ring union