Bob Moler's Ephemeris Blog

Ephemeris for Monday, July 22nd.  Today the sun will be up for 15 hours, setting at 9:18.   The moon, at full today, will rise at 9:00 this evening.  Tomorrow the sun will rise at 6:19.

At 11 this evening the bright star Deneb in Cygnus the swan will be moderately high in the east northeast.  Deneb is the dimmest star of the summer triangle.  Of the other stars of the triangle, Vega is nearly overhead, and Altair to the south.  While Deneb’s apparent magnitude, or brightness as seen from earth, makes it the dimmest of the three bright stars, Deneb’s vast distance of possibly 2,600 light years makes it 100 times the distance of Vega.  If brought as close as Vega, Deneb would be several time brighter than Venus.  For all this it is only 13-20 times the mass of the sun.  It will have an extremely short life and it will explode, go supernova, in perhaps a few million years.

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

Addendum

Deneb with the other stars and constellations in the Summer Triangle. Created using Stellarium.