Home > Ephemeris Program, Meteor Shower > 11/17/2015 – Ephemeris – The Leonid peak is expected to be today and tonight

11/17/2015 – Ephemeris – The Leonid peak is expected to be today and tonight

November 17, 2015

Ephemeris for Tuesday, November 17th.  The Sun will rise at 7:42.  It’ll be up for 9 hours and 30 minutes, setting at 5:12.   The Moon, 2 days before first quarter, will set at 10:49 this evening.

The Leonid meteor shower is predicted to reach its peak or rather peaks today.  One this afternoon is a newly computed peak, which we obviously cannot see, and another around 11 p.m. which occurs just before the radiant rises.  The radiant is the point in the sky from which the meteors seem to come from, so to see any meteors that source point must be above the horizon.  The Leonid meteors are the debris of Comet 55P/Tempel-Tuttle, which was discovered independently by Ernst Tempel in 1865 and Horace Tuttle 18 days later.  The 55P in the name means that it was the 55th recognized periodic comet.  It has a period of 33.24 years giving rise to meteor storms every 33 years or so.  This isn’t one of those years.

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

Addendum

All sky chart for Leonids

An all sky chart for 5 a.m for the Leonid meteor shower for 2015. Created by my LookingUp program.  The yellow pattern marked LeoR is the Leonid radiant.

55P/Tempel-Tuttle near the Earth

The orbit of 55P/Tempel-Tuttle near the Earth. The color or the orbit is lighter north of the Earth’s orbital plane. Note that the orbit of the comet crosses the Earth’s orbital plane as it passes just inside the Earth’s orbit. Created with JPL Small-Body Database Browser.

The entire orbit of 55P/Tempel-Tuttle.

The entire orbit of 55P/Tempel-Tuttle. The color or the orbit is lighter north of the Earth’s orbital plane. Created with JPL Small-Body Database Browser.

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