Celestia Forums

Hi all,

here I compared a recent Cassini shot (March 10. 2004) of Prometheus & Pandora along with Saturn's outer rings with Celestia's emulation thereof.

I have converted the Celestia Image also into grayscale.

Not too bad, the distance of the two tiny moons seems a little on the large side...Saturn's shadow is also fine.



Bye Fridger

This image about the ring shadows on Saturn is also quite revealing! It seems we are doing not at all badly;-)

Bye Fridger

t00fri wrote:Not too bad, the distance of the two tiny moons seems a little on the large side...

Astonishingly good, I think, given that this pair interact quite strongly, and their orbits in Celestia are the simple J2000 Keplerian elements.

Grant

t00fri wrote:This image about the ring shadows on Saturn is also quite revealing! It seems we are doing not at all badly

Does this mean you're beginning to get happier about the darkness of the ring shadows, Fridger?

Grant

granthutchison wrote:

t00fri wrote:Not too bad, the distance of the two tiny moons seems a little on the large side...

Astonishingly good, I think, given that this pair interact quite strongly, and their orbits in Celestia are the simple J2000 Keplerian elements.

Grant

Of course, Grant;-). Otherwise I would not have cared to produce the comparison...

Bye Fridger

t00fri wrote:Of course, Grant;-). Otherwise I would not have cared to produce the comparison...

And of course I discerned the point you were making. But others less used to your impenetrable ways might well have missed it

Grant

granthutchison wrote:

t00fri wrote:This image about the ring shadows on Saturn is also quite revealing! It seems we are doing not at all badly

Does this mean you're beginning to get happier about the darkness of the ring shadows, Fridger?

Grant

Yes indeed, my dear;-)

Bye Fridger

t00fri wrote:... my dear

Ri-i-ight. Thanks for the thought. I'll just assume that one works better in German than in English.

Grant

granthutchison wrote:

t00fri wrote:... my dear

Ri-i-ight. Thanks for the thought. I'll just assume that one works better in German than in English.

Grant

And as a good-night "sweety":

Saturn's latest cloud bands, "seasoned" with some real color cloning from the previous Cassini shot.



Bye Fridger

Why the colors of that picture are different from the colors of previous pictures??

Because you recolored it ??

maxim

maxim wrote:Because you recolored it ??

maxim

For the fun of it, I have just used a standard color cloning technique by taking as a reference color profile the true-color Saturn image from Cassini in February, I think. The citron yellow Saturn above is certainly NOT true color.

Bye Fridger

Fridger, do you mind if I use your first picture in my gallery ? I'm trying to gather some comparisons pictures.

ElPelado,

All of Cassini's pictures of Saturn are shades of grey. To make color pictures, they take pictures through several different colored filters and then colorize and combine those grey images.

In this case, they colored the resulting picture yellow to help accentuate some of the shading. Our eyes tend to be more sensitive to shades of yellow.

Some information about Cassini's cameras can be found at http://saturn.jpl.nasa.gov/spacecraft/instruments-cassini-iss.cfm



Maxim,

If you use the "reply with quote" button, you'll see that ElPelado's message links to one of the pictures provided on JPL's APOD Web site, not to one that he modified.

Psykotik wrote:Fridger, do you mind if I use your first picture in my gallery ? I'm trying to gather some comparisons pictures.

Thats fine with me, of course.

Bye Fridger

... you'll see that ElPelado's message links to one of the pictures provided on JPL's APOD Web site

Just a reminder: Even if the image itself is free to use, we are using their bandwidth, so there should be a credit with the image - and if it's not free to use, better ask a lawyer

Harald

selden wrote:Maxim,

If you use the "reply with quote" button, you'll see that ElPelado's message links to one of the pictures provided on JPL's APOD Web site, not to one that he modified.

I supposed something like that.
It was just a short attack of irony.

maxim