Open AccessAnalysis on the Hour-lines of Yangcheon-cheok
Author(s) -
Sang Hyuk Kim,
ByeongHee Mihn,
Yong Sam Lee
Publication year - 2017
Publication title -
journal of astronomy and space sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.273
H-Index - 11
eISSN - 2093-5587
pISSN - 2093-1409
DOI - 10.5140/jass.2017.34.1.55
Subject(s) - geodesy , geography
We studied the hour-lines of six extant Yangcheon-cheoks in Korea. To find whether Yangcheon-cheok was used in the whole\udarea of Korea, we calculated the length of shadows of Yangcheon-cheok on the Korean Peninsula, Nanjing and Beijing as\udwell as Hanyang (Seoul), according to 24 solar terms. Comparing the length of shadows with hour-lines of those relics, we\udcould find that Yangcheon-cheok was suitable for use at limited times (from 9:00 to 15:00) during the year. Also, this sundial\udis more appropriate for use at low latitudes than high ones. Among existing relics, that of Seoul Museum of History made\udwith porcelain was much more suitable to use at Hanyang and its higher latitude. Lee’s collection was also suitable to use\udat Nanjing. It is certain that Yangcheon-cheok was a portable sundial which could be used from nine to fifteen of clock all the\udyear around except for the winter season