Archive

Archive for November 19, 2012

11/19/2012 – Ephemeris – A Leonid meteor peak at 1 a/m/ EST tomorrow morning.

November 19, 2012 Comments off

Ephemeris for Monday, November 19th.  The sun will rise at 7:45.  It’ll be up for 9 hours and 25 minutes, setting at 5:10.   The moon, 1 day before first quarter, will set at 11:43 this evening.

There is expected to be a peak of the Leonid meteor shower at around 1 tomorrow morning.  By then the radiant of the meteor shower will have risen in the east in the head of Leo the lion in the curve of the backwards question mark that denotes the front end of the beast.  The Leonids do not have the same numbers every year.  Great meteor storms occur, on average every 33 years because they are associated with a comet of the same period, Comet Tempel-Tuttle.  It last came through the inner solar system in 1998, so this is not a great year for them.  However astronomers are getting better at predicting where the debris streams are that were liberated by the comet in its passes of the sun, giving observers a heads up on the best times to look.

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

Addendum

Leo rising at around 2 a.m. on the morning of November 20. Note the radiant .

Leo rising at around 2 a.m. on the morning of November 20. Note the radiant in the sickle asterism of Leo. Created using Looking Up, my own program.

At 1 a.m. the triangle of stars at his haunches will not have risen yet.  The maximum number of meteors per hour will be 10-20.  However this is if the radiant is overhead.  The numbers are expected to be lower.   This will not be as visible west to here (Michigan).