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Full Version: Rev 151 - Jul 21-Aug 12, 2011 - Saturn storm, Rhea
Unmanned > Outer Solar System > Saturn > Cassini Huygens > Cassini's ongoing mission and raw images
The Looking Ahead Article was posted last week:

One of the more interesting highlights is an observation of HD189733, which is host to a Jupiter-sized exoplanet. The observation on July 23 was designed for VIMS to detect a transit by that planet across the disc of its parent star. Another observation on July 24 would look at the secondary eclipse, when the planet passes behind the star.

The observation from July 23 is on the ground and the raw images are on the JPL raw images page.

This is one of many frames taken. HD189733 is the brightest star in the image in the upper left quadrant of the frame. The two bright stars in the upper right quadrant are (from left to right) TYC 2141-1146-1 and HD345464.
Neat! I hope the instruments are good enough to detect the transit.
Some info on HD 189733:

Looks like a mag. 10 star. Should be pretty easy to get plenty of flux off of that!
Thanks Volcanopele for the continuing looking ahead posts, always interesting.

Are we going to gather some new information about the exoplanet by observing from a vantage point far away from Earth?
If the transit timing is accurate enough, you can constrain the actual orientation of the orbit of the planet by watching it from Cassini's perspective and Earth's perspective. HD 189733 b's shadow is a moving one. But you'll need very high accuracy. I would be very impressed if we have that capability with the aforementioned assets and baseline.
Frank Crary
QUOTE (akuo @ Jul 26 2011, 09:40 PM) *
Are we going to gather some new information about the exoplanet by observing from a vantage point far away from Earth?

I believe the idea was to get IR spectra, at wavelengths unavailable from the ground, to give some information on the composition of the exoplanet's atmosphere. That's much more difficult than just detecting the transit, and I think this was actually done as a proof of concept.
One of the best Icy Moon shots ever--and in color. I'm sure someone will put it together and rotate it 90 degrees. At least 5 moons!!!!!
Ian R
Click to view attachment
You can even see a bit of Herschel on Mimas, just barely.
Ian R
Click to view attachment
Ian R
A slightly better attempt at a R-G-B composite, taken through the WAC:

Click to view attachment
Here's my shot at it:
Click to view attachment
Found this set of color data on my former laptop downloaded way back in July, so I gave this data a quick run. The 5-moon image in RGB (not sure if the red channel was the CB2 filter or red).

Click to view attachment

Sean Walker
Oh my God, it's full of moons! smile.gif

I posted an animation showing the moons' motion from Rings Node Saturn Viewer wireframe images here.
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