Contains:  Solar system body or event
Saturn 27 Apr 2024 - Tethys Shadow Egress Animation, Seb Lukas

Saturn 27 Apr 2024 - Tethys Shadow Egress Animation

Acquisition type: Lucky imaging
Saturn 27 Apr 2024 - Tethys Shadow Egress Animation, Seb Lukas

Saturn 27 Apr 2024 - Tethys Shadow Egress Animation

Acquisition type: Lucky imaging

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Description

Animation of 31 WinJ composites separated by 12s each (reference time generation method). Each composite 37m in duration.

I was pleasantly surprised to be able to detect Tethys shadow as it neared Saturn's eastern limb on the morning of Sun 28 Apr Canberra time.  The planet was still sub-30 degrees in altitude and transparency was variable with light fog around.  The clip covers a period of 6 minutes from 4:55 to 5:01am AEST.

Tethys itself is quite elusive and only becomes noticeable in selective composites as it transits Saturn's disk, still only 16" in size.  It's located just below the ring plane.  The shadow pops into view as it nears the edge partly due to increased size as it stretches.  Luck had it that the largest moon Titan was also in close proximity; its anti-planet hemisphere is on show as it slides from west to east.

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