@ Beam : No we didn't do measurements there, because it was done with the 80cm telescope, which was only for lurking purpose. It would require to know the satellites' positions on their orbits, or to observe them several nights, because you clearly miss one dimension on the picture.
Time for some 3-colour pics from the CCD installed on the 120cm telescope ! As I sometimes can't recall what pics I took personnally (me and another guy, because there were a few groups which rotate on several nights), I suppose these were "my" pics !
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The planetary nebula in Lyra (M57).
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One of the galaxies in the Leo constellation (M66). The 3 layers don't fit nicely, due to atmospheric perturbations.
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The Dumbbell Nebula (NGC 6853). I think it's this one, comparing to other pics from the Internet !! It doesn't look like a 3-colour pic, all the more as it was taken on a different night.
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A globular cluster (of stars). It could be any one of them, I can't recall which one it was. I should have kept a better paper of what we shot ! (and maybe it wasn't one of "my" pics too...)
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A spiral galaxy seen from above (or below). It could be any one of such galaxies, since it's not one of my pics.
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A galaxy seen from the side (not one of my pics). You can see the absorption of light due to interstellar clouds (dark parts). Such clouds "eat" the visible light and reject some infrared light (thus invisible), due to their low temperature.
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The Sombrero Galaxy (not one of my pics). I know it's this one, since it heavily looks like those from the Internet. Beautiful shot.
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Saturn in ultraviolet. Not nice to see because it was printed and then re-scanned ! We tried to shoot it in visible light, but the damn CCD couldn't take very quick shots (less than 3 seconds) : the planet was really too brilliant in such wavelenghts, so we just did it in UV.
Well, I didn't post all pics, since other ones weren't as interesting and nice, and we screwed some more (3-layer thingie). It was a nice week.