Thursday, January 12, 2012

Single Phenomena 2012: The Truth Behind Them

What are single phenomena of Jupiter's satellites and how can this occur? These commonly asked questions about single phenomena are inevitable to every person, and should be all summed up in this article.  Single phenomena are beautiful flourishes of every Jovian event calendar, and should remain that way, for their intrinsic values are not that complex at all. Appropriately defined, single phenomena of Jupiter's moon is "an event of the Galilean moons when one moon is the only one visible, the others either occulted or in transit." And this will occur eleven times, divided into two periods, in 2012.

The first period of single phenomena is in January, with five events in a little over two weeks. Callisto (as for all of the 2012 single phenomena) is the only moon present (partially becasue its orbit is so big, rarely it is in transit or in occultation), while the other three, Io, Europa, and Ganymede are not. The next period takes place in the end of July and is finished around Mid-August. These comprise the rest (six) of the phenomena.
Below is a table of these eleven events for 2012.

You can configure what these would appear to be at the Galilean Moons Simulator; just plug in the time and date into the simulation. NOTE: The times in the chart are in TDT. Galilean Moons Simulator computes only in UTC. Conversion: (TDT is about a minute or two ahead of UTC).
With references from

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Credit: NASA