Heuldal of Gojoseon
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Emperor Holdal is accounted in historical record Hwandan Gogi to be the thirteenth Emperor of Go-Joseon Dynasty in Korea.
The record of the gathering of five planets, Mercury, Venus, Mars, Jupiter and Saturn in 1733 BC during Holdal's time has been a matter of interest. Through the programs tracking the movement of planets, it has been found that the event actually happened a year before, in 1734 BC. This positive observation has been viewed by many as a justification of the historical value of Hwandan-Gogi, which some historians believe to be a forgery or a tale of mythology.