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Posted by M C Butcher at 10:29 on 2011 Nov 17
Can anyone advise me how to determine the times of GRS passage of the Jovian Central Meridian. Obviously I have the BAA Handbook with the details that it contains, however, what I think I am missing is the longitude of the GRS, or indeed any other prominent atmospeheric phenomena. I have the current value from this months’ copy of Astronomy Now, and very useful it has proved, but presumeably the longitude will vary with time; where can I find out this information (apart from hoping that Astronomy Now continue to publish it)?Many thanks.Martin Butcher
Posted by Callum Potter at 14:40 on 2011 Nov 17
I don’t know if this is what you are looking for Martin, but the Sky and Telescope magazine website has a useful calculator, and a table through to March 2012.http://www.skyandtelescope.com/observing/objects/javascript/3304091.htmlI have not checked how accurate the GRS transit times are, though.Regards, Callum
Posted by Robin Vann at 13:32 on 2011 Nov 20
I think the best place is the Jupos project website:http://jupos.privat.t-online.de/Pick the item ‘GRS Longitude (Sys. 2)’ from the menu on the left.
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