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Unmanned Spaceflight.com > Outer Solar System > Saturn > Cassini Huygens > Cassini's ongoing mission and raw images'rock' satellite flybys, The next ten weeks |
 May 16 2008, 06:37 PM
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 Member  Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655  |
Cassini's orbits are now averaging 8-9 days apiece as the end of the prime mission approaches, and according to information posted on this forum, Cassini approaches within 75,000km of various 'rock' satellites EIGHTEEN times in the next ten weeks.
These flybys include the closest remaining encounters with Daphnis, Prometheus, Pandora, Epimetheus, Janus, and Pallene (all of these sub-30,000km). Many close moon-encounters fall during Saturn eclipse, and there are many competing experiments around periapse, but hopefully there will be some planned ISS observations of these small moons at or around closest-approach... 
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Jul 23 2008, 12:14 PM
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
A couple of new images of Prometheus/F-ring have been posted, this one taken from a distance of around 450,000km.
I can't think of a single image which demonstrates gravity better than this - Newton (the old curmudgeon) would have loved it.
Attached thumbnail(s)
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Jul 23 2008, 02:22 PM
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 Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
QUOTE (jasedm @ Jul 23 2008, 07:14 AM)  I can't think of a single image which demonstrates gravity better than this Forgive my really naive question: How do we know it's not due to electrostatics? -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Jul 23 2008, 03:37 PM
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
QUOTE (Juramike @ Jul 23 2008, 03:22 PM) Forgive my really naive question: How do we know it's not due to electrostatics? Perhaps both processes are visible here. I've read that the outer elements of the F-ring appear to be smoke-sized particles, in which case I wouldn't be surprised if the passing 'wake' of the moon stirred up some of the 'smoke' creating visible ripples, but the 'core' of the ring (the two brighter threads in the image) are made up of much larger constituents, and the obvious kink is surely gravitationally-produced... Just for context, this image was taken from below the ring plane, with Prometheus further from Cassini (by 800km or so) than the core of the ring. |
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Jul 23 2008, 07:40 PM
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 Junior Member Group: Members Posts: 47 Joined: 27-June 08 From: Ashford, Kent, United Kingdom. Member No.: 4244 |
Hi everyone,
Think you may like this one. I'm surprised by the very high calibre of the membership here, this has been missed. Janus in eclipse in Saturn's shadow, lit by the other moons from 33,000 KM. I have cropped, slightly enlarged it & brightened / contrast enhanced the image, as the original was very dark. I'm afraid that I could do nothing about the cosmic ray / noise speckling.
Andrew Brown. -------------------- "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.
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jasedm 'rock' satellite flybys May 16 2008, 06:37 PM
volcanopele Just a quick scan: Janus (Jun 30; 59000 km; high p... May 16 2008, 06:52 PM
DrShank QUOTE (volcanopele @ May 16 2008, 12:52 P... May 16 2008, 07:11 PM volcanopele It is on March 3, 2010 at 13:40:41UTC. Distance t... May 16 2008, 07:57 PM jasedm Some long range images (around 350,000km ) of Janu... May 18 2008, 02:18 PM jasedm Some more far-out janus shots have just been poste... Jul 15 2008, 03:43 PM centsworth_II QUOTE (jasedm @ Jul 23 2008, 08:14 AM) ..... Jul 23 2008, 02:18 PM jasedm Hi Andrew, this is a view of Janus I've been l... Jul 23 2008, 08:35 PM volcanopele It wasn't missed, just covered in a different ... Jul 23 2008, 08:47 PM 3488 Thanks VP for setting me straight. I was aware of ... Jul 23 2008, 09:22 PM ugordan QUOTE (3488 @ Jul 23 2008, 11:22 PM) I wa... Jul 23 2008, 09:26 PM jasedm Can't compare to Enceladus' close-up of co... Aug 14 2008, 09:35 AM Ken90000 Did we miss Pallene? The images appear blank. I ... Aug 22 2008, 02:54 PM tallbear QUOTE (Ken90000 @ Aug 22 2008, 06:54 AM) ... Aug 22 2008, 04:32 PM Ken90000 Thanks, T
Perhaps there will be another opportuni... Aug 23 2008, 09:45 PM ugordan QUOTE (jasedm @ Aug 14 2008, 10:35 AM) Th... Feb 5 2009, 05:20 PM Tom Tamlyn Will there be any opportunities for better images ... Feb 5 2009, 09:23 PM pat QUOTE (Tom Tamlyn @ Feb 5 2009, 09:23 PM)... Feb 11 2009, 12:26 PM jasedm The relevant looking-ahead article on Ciclops sugg... Aug 24 2008, 02:29 PM Floyd Lots of great images of DAPHNIS--potential movie. ... Feb 3 2009, 11:26 PM jasedm It seems Daphnis kicks a lot of material up out of... Feb 5 2009, 04:49 PM |
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