Colour in Jupiter's satellites

[lukebl]

Hi all.

Just been dodging the showers to try and image Io's transit this evening, but largely in vain due to cloud cover and poor seeing. Just managed one quick avi before the clouds rolled in and I had to give up.

I wasn't going to post this as I didn't have time to get the focusing right, seeing was poor and it's a rather fuzzy image, but what struck me is how yellow Io appears on the image. Now, I know there's a bit of colour fringing in the image, but I wouldn't have thought there was so much to make Io look so vivid. And I know that Io is well known as being probably the most active volcanic and sulphuric hell-hole in the solar system, so does that account for the strong yellow hue?

Not sure if it shows up on the image here, but it really stands out on my original image like a sherbet lemon! I wonder if a particularly yellow hemisphere was facing us at the time. I guess it looked pale yellowish visually.

It's the first time I've noticed any particular colour in any of the Galilean satellites, although one of my recent images of a transit of Ganymede shows how dark and grey that particular satellite is. Anyone else noticed it?

[brantuk]

It doesn't look like colour fringing or it would be just round the edges. The whole satellite looks coloured - I'm no expert by a long shot but it looks like you've got Io in orange - nice one

[gustavo_sanchez]

It seems that the color is real... There is some fringing on the right side of Jupiter, but it's not enough...

That's a very nice picture! What eyepiece and equipment you used for this image?

[lukebl]

Thanks guys. It was imaged with an SPC900 webcam, 3x Televue Barlow, 250mm f/4.8 Newtonian. About 1400 frames stacked in Registax.

[oldfruit]

Nice capture. Sounds like you were up against the elements and still great results. Great work.

[DarkerSky]

I know that visually some people have been able to pick up the yellow/orange hues of Io through the EP with larger scopes.