September Moon at Perigee

   Our Moon reaches perigee, (closest distance to Earth), for this orbit, on Saturday September 28th. At that time the Moon will be at a distance of 28.05 Earth diameters, 222,328 miles (357,803 km) from the Earth.

   On the day of the perigee Moon the 29-day old very thin waning crescent Moon will be over the eastern horizon rising within about 30 minutes ahead of the Sun. This puts the Moon too close to the Sun to be seen. The waning crescent Moon becomes new Moon about 12 hours after the Sun and Moon rise.

   Does our Moon actually go around the Earth as this graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*
   *Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

   Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.


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