Astronomical Alignments

Astronomical Alignments (HMIMT)

Location: Oregonia, OH 45054 Warren County
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Country: United States of America
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N 39° 24.437', W 84° 5.416'

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American Indians who built Fort Ancient used the sun and moon to measure time. By observing the rising location of these celestial objects they knew when to gather together for religious or social events or when to plant crops. They used sunrise locations to predict annual events and moonrise location to measure intervals of several years' duration.

You are at the southwest corner of a nearly perfect square made by four mounds. Three astronomical alignments have been demonstrated from this point.

On the summer solstice, usually June 21, the sun rises in the gap just north of Rt. 350. 2

The maximum northern moonrise 1 occurs approximately 9.3 years after the minimum northern moonrise 3 with this complete lunar cycle taking 18.6 years or one generation.
Placed ByThe Ohio Historical Society
Marker ConditionNo reports yet
Date Added Monday, September 8th, 2014 at 8:22pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)16S E 750529 N 4366015
Decimal Degrees39.40728333, -84.09026667
Degrees and Decimal MinutesN 39° 24.437', W 84° 5.416'
Degrees, Minutes and Seconds39° 24' 26.22" N, 84° 5' 24.96" W
Driving DirectionsGoogle Maps
Area Code(s)937, 513
Closest Postal AddressAt or near 6123 OH-350, Oregonia OH 45054, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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