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Methone ring arc discovered
ynyralmaen
post Nov 23 2006, 01:18 PM
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IAU circular 8773 reports the discovery of a 1000km-wide Saturn ring arc by Cassini at the orbital distance of 3 km-wide Methone (3.23 Saturn radii). It's been given the designation R/2006 S5, and appears to be close to, if not including, the position of Methone itself.

Rather than being found in images, the arc's presence was revealed by the MIMI instrument detecting a drop in electron fluxes during a perihelion pass in September. The dust particles that make up the ring absorb magnetospheric electrons, forming a "wake" that Cassini passed through both inbound and outbound.
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ynyralmaen
post Sep 5 2008, 04:05 PM
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QUOTE (ynyralmaen @ Nov 23 2006, 02:18 PM) *
IAU circular 8773 reports the discovery of a 1000km-wide Saturn ring arc ...


ISS confirms the existence of the Methone arc; also reported in IAU Circular 8970.
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Posts in this topic
- ynyralmaen   Methone ring arc discovered   Nov 23 2006, 01:18 PM
- - edstrick   That's how Pioneer 11 discovered Jupiter's...   Nov 24 2006, 11:44 AM
- - Phil Stooke   The Vikings did a ring and new satellite search be...   Nov 24 2006, 01:55 PM
- - jsheff   This is unusual in that Neptune is the only other ...   Nov 24 2006, 03:18 PM
|- - ugordan   QUOTE (jsheff @ Nov 24 2006, 04:18 PM) a ...   Nov 24 2006, 03:25 PM
- - Floyd   As Methone is a trojan moon sitting at a Legrange ...   Nov 24 2006, 04:01 PM
|- - ynyralmaen   QUOTE (Floyd @ Nov 24 2006, 05:01 PM) As ...   Nov 25 2006, 12:12 AM
- - ynyralmaen   QUOTE (ynyralmaen @ Nov 23 2006, 02:18 PM...   Sep 5 2008, 04:05 PM

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