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the island of Rhodes is located between the latitudes of 35.85 and 36.50 degrees north.
In 2014, a study by Carman and Evans argued for a new dating of approximately 200 BC based on identifying the start-up date on the Saros Dial as the astronomical lunar month that began shortly after the new moon of 28 April 205 BC .
Contains approximately the bottom right third of the Metonic spiral and inscriptions of both the spiral and back door of the mechanism.
Of the 82 known fragments, seven are mechanically significant and contain the majority of the mechanism and inscriptions.It is a complex clockwork mechanism composed of at least 30 meshing bronze gears.A team led by Mike Edmunds and Tony Freeth at Cardiff University used modern computer x-ray tomography and high resolution surface scanning to image inside fragments of the crust-encased mechanism and read the faintest inscriptions that once covered the outer casing of the machine.Another theory suggests that coins found by Jacques Cousteau at the wreck site in the 1970s date to the time of the device's construction, and posits that its origin may have been from the ancient Greek city of Pergamon, Rhodes was a busy trading port in antiquity and a centre of astronomy and mechanical engineering, home to astronomer Hipparchus who was active from about 140 BC to 120 BC.The mechanism uses Hipparchus's theory for the motion of the moon, which suggests the possibility that he may have designed it or at least worked on it.