Bob Moler's Ephemeris Blog

Ephemeris for Thursday, October 4th.  The sun will rise at 7:44.  It’ll be up for 11 hours and 32 minutes, setting at 7:16.   The moon, 4 days before last quarter, will rise at 9:40 this evening.

There’s a bright star that appears for only seven and a half hours on autumn evenings.  It’s appearance, low in the southeast at 10 p.m., is a clear indication of the autumn season.  The star’s name is Fomalhaut, which means fish’s mouth.  That’s fitting because it’s in the constellation of Piscis Austrinus, the southern fish.  At our latitude it’s kind of the fish that got away, because Fomalhaut appears to be quite alone low in the sky.  The dimness of the constellation’s other stars and location close to the horizon make the faint stars hard to spot. The earth’s thick atmosphere near the horizon reduces their brightness by a factor of two or more, so Fomalhaut, one of the brightest stars in the sky, keeps a lonely vigil in the south.

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

Addendum

The bright star Fomalhaut all alone at 10 p.m. on October 4, 2012. Created using Stellarium.

Click image to enlarge.