Starship Asterisk*

Chris Peterson wrote:

Ann wrote:I take back what I said about the color of Saturn's limb. I looked at the APOD at work, and my computer there made it look blue. My home computer doesn't. In fact the colors don't overlap, and Saturn's left limb is red, with a blue arc just inside it. The right side of the limb is green.

Presumably this is a consequence of the fact that color images from the Cassini imaging system are made by taking separate exposures through different filters, and there is some movement of the spacecraft with respect to the target between those exposures.

Ann wrote:I take back what I said about the color of Saturn's limb. I looked at the APOD at work, and my computer there made it look blue. My home computer doesn't. In fact the colors don't overlap, and Saturn's left limb is red, with a blue arc just inside it. The right side of the limb is green.

rstevenson wrote:

Ann wrote:

Ann wrote:Note the tinge of blue in parts of Saturn's limb.

I take back what I said about the color of Saturn's limb. I looked at the APOD at work, and my computer there made it look blue. My home computer doesn't. In fact the colors don't overlap, and Saturn's left limb is red, with a blue arc just inside it. The right side of the limb is green.

My eye just spotted the blue arc inside the red one, and I thought that the whole thing was blue. How typical of me.

The left side of the F-ring shows the same red-blue separation as Saturn's left limb. Even so, the F-ring looks slightly bluer than the other rings to me.

For reference, here's a screen grab showing my Digital Color Meter hovering over the area down near the bottom-left visible edge of the lit area of Saturn. (My cursor was 'grabbed', but was almost directly to the left of the bottom edge of the enlarged area inside the meter's window.) On my screen that reddish area is a bright violet, and the blueish area is a range of teal tones.

colour fringe.jpg
Rob

Ann wrote:

Ann wrote:Note the tinge of blue in parts of Saturn's limb.

I take back what I said about the color of Saturn's limb. I looked at the APOD at work, and my computer there made it look blue. My home computer doesn't. In fact the colors don't overlap, and Saturn's left limb is red, with a blue arc just inside it. The right side of the limb is green.

My eye just spotted the blue arc inside the red one, and I thought that the whole thing was blue. How typical of me.

The left side of the F-ring shows the same red-blue separation as Saturn's left limb. Even so, the F-ring looks slightly bluer than the other rings to me.

Case wrote:

De58te wrote:Interesting anomaly about the shadow. […] Yet on the far left edge of the shadow and the night side of Saturn there is a distinct arc raised up above the shadow curve.

I presume that is an image edit/cleanup that was supposed to stay hidden in the shadows. There is a another such broad brush stroke, a bit up from the same spot as the other, just above the rings.

Ann wrote:Note the tinge of blue in parts of Saturn's limb.

Ann

heehaw wrote:

Boomer12k wrote:Outstanding view...
It amazes me that while traveling through the rings, they were so thin, and you could not make out any ice chunks, I guess none were near enough... also you can see the outermost ring at the sides...but not front side or back....unless you click on the image and then zoom in...
:---[===] *

I am still more than annoyed that they did not 'end' the mission by having Cassini gently join a ring. We would have received wonderful close-ups of snowballs on parade! The pollution argument is silly - Saturn itself may well have been polluted by the chosen demise.

Boomer12k wrote:Outstanding view...
It amazes me that while traveling through the rings, they were so thin, and you could not make out any ice chunks, I guess none were near enough... also you can see the outermost ring at the sides...but not front side or back....unless you click on the image and then zoom in...
:---[===] *

De58te wrote:Interesting anomaly about the shadow. […] Yet on the far left edge of the shadow and the night side of Saturn there is a distinct arc raised up above the shadow curve.