Home > Ephemeris Program, NASA, Saturn > 05/11/2017 – Ephemeris – Cassini is surviving its death-defying dives under the rings of Saturn

05/11/2017 – Ephemeris – Cassini is surviving its death-defying dives under the rings of Saturn

May 11, 2017

Ephemeris for Thursday, May 11th.  Today the Sun will be up for 14 hours and 40 minutes, setting at 8:59, and it will rise tomorrow at 6:17.  The Moon, 1 day past full, will rise at 9:42 this evening.

The Cassini spacecraft has been redirected by passing Titan on a special trajectory that sent it into a fatal set of orbits that take it a few thousand miles above Saturn’s cloud tops and under the innermost rings.  So far after two passes Cassini survives.  One discovery of the first pass was a storm, perhaps a hurricane, whose clear eye is at Saturn’s north pole.  Cassini has yet to turn its cameras to the rings on these passes inside the rings, but it will before its final orbit.  Currently it is flying communication dish first to protect its delicate instruments from ring particles.  So far the gap between the rings and the planet are more free of particles than expected.  Which is a good omen for the last 20 passes between the rings and planet.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Cassini's grand finale

In its planned last 22 orbits of Saturn, the Cassini spacecraft will pass between the innermost ring and the planet itself. Credit NASA, JPL.

Saturn's North Pole

The clearing (blue sky) in the clouds at Saturn’s north pole spotted by Cassini on its first pass under the rings. Credit: NASA/JPL-Cal Tech/S Si/Sophia Nasr

 

Advertisements
%d bloggers like this: