Harvest Moon

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  • Member since
    May, 2005
Harvest Moon
Posted by Centaur on Monday, September 12, 2005 8:07 PM

Near sunset on Saturday evening, September 17, the Harvest Moon will be seen rising just slightly south of the eastern point on the horizon.  It will appear unusually large since it will be only about a day-and-a-half past perigee.

The Harvest Moon is the Full Moon that occurs nearest to the moment of the Autumnal Equinox, which is September 22 this year.  It provides the moonlight for farmers to continue harvesting into the evening.  This is true for several nights in a row because of the sharp angle the ecliptic strikes the horizon at sunset during this time of the year.  The geometry allows the Moon to rise only a short time later during successive evenings.  This will be especially true in Septembers 2005 and 2006 since the Moon will be in the zone of its 18.6-year nodal cycle during which the effect is exaggerated.

On average, the Moon rises 50.47 minutes later each day.  But printed below are the Moon’s CDT rising times as viewed from Chicago’s Adler Planetarium later this month.

Sep 17 – 18:58
Sep 18 – 19:21 – 23 minutes later than the previous evening
Sep 19 – 19:44 – 23 minutes
Sep 20 – 20:09 – 25 minutes
Sep 21 – 20:38 – 29 minutes

If you’re not a farmer, then get ready to enjoy the beauty of the rising Harvest Moon.  If you are one, then prepare to get to work. Wink [;)]

For astronomical graphics, including monthly wallpaper calendar, visit:


  • Member since
    May, 2005
Posted by Anonymous on Wednesday, September 14, 2005 1:18 AM
Excellent info,
Thanks, Centaur,
Cool [8D]Clear Skies   --- SilveradogoldCool [8D]

  • Member since
    May, 2005
Posted by tommy on Saturday, September 17, 2005 9:51 PM
Very interesting topic, it is a shame that many in todays world pay little attention to the sky or have any idea how it works,my in-laws called me this evening and wanted to know why the moon looked so big and was so close to the ground just after sunset,they seemed shocked to learn that everthing in the sky moves because the earth is rotating.Big Smile [:D]
  • Member since
    February, 2003
Posted by cooltech on Thursday, September 22, 2005 10:07 PM

Thanks for the info. I have been ckin' it every night since full.

cooltechCool [8D]


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