A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty
The Yang-gyeong-gyu-il-ui (兩景揆日儀) is a kind of elevation sundial using three wooden plates. Sang-hyeok Lee (李尙爀, 1810~?) and Byeong-cheol Nam (南秉哲, 1817~1863) gave descriptions of this sundial and explained how to use it in their Gyu-il-go (揆日考) and Ui-gi-jip-seol (儀器輯說), respectively. According t...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2015-03-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n1/OJOOBS_2015_v32n1_73.pdf |
| _version_ | 1797368889928056832 |
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| author | Yong Sam Lee Sang Hyuk Kim Byeong-Hee Mihn |
| author_facet | Yong Sam Lee Sang Hyuk Kim Byeong-Hee Mihn |
| author_sort | Yong Sam Lee |
| collection | DOAJ |
| description | The Yang-gyeong-gyu-il-ui (兩景揆日儀) is a kind of elevation sundial using three wooden plates. Sang-hyeok Lee (李尙爀,
1810~?) and Byeong-cheol Nam (南秉哲, 1817~1863) gave descriptions of this sundial and explained how to use it in their
Gyu-il-go (揆日考) and Ui-gi-jip-seol (儀器輯說), respectively. According to Gyu-il-go (揆日考) there are two horizontal plates
and two vertical plates that have lines of season and time. Subseasonal (節候) lines are engraved between seasonal (節氣)
lines, subdividing the interval into three equal lines of Cho-hu (初候, early subseason), Jung-hu (中候, mid subseason) and
Mal-hu (末候, late subseason); there are 13 seasonal lines for a year, thus resulting in 37 subseasonal lines; also, there are 12
double-hour (時辰) lines for a day engraved on these plates. The only remaining artifact of Yang-gyeong-gyu-il-ui was made
in 1849 (the 15th year of Heon-jong) and is kept at the Korea University Museum. We have compared and analyzed Yanggyeong-
gyu-il-ui and similar western sundials. Also, we have reviewed the scientific aspect of this artifact and built a replica.
Yang-gyeong-gyu-il-ui is a new model enhanced from the miniaturization development in the early Joseon Dynasty and can
be applied to the southern part of the tropic line through a structure change. |
| first_indexed | 2024-03-08T17:39:10Z |
| format | Article |
| id | doaj.art-a55369215d1a4ec191eec56c948a541c |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:39:10Z |
| publishDate | 2015-03-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-a55369215d1a4ec191eec56c948a541c2024-01-02T11:28:20ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092015-03-01321738010.5140/JASS.2015.32.1.73A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon DynastyYong Sam Lee0Sang Hyuk Kim1Byeong-Hee Mihn2Department of Astronomy and Space Science, Chungbuk National University, Cheongju 361-763, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaDepartment of Astronomy and Space Science, Chungbuk National University, Cheongju 361-763, KoreaThe Yang-gyeong-gyu-il-ui (兩景揆日儀) is a kind of elevation sundial using three wooden plates. Sang-hyeok Lee (李尙爀, 1810~?) and Byeong-cheol Nam (南秉哲, 1817~1863) gave descriptions of this sundial and explained how to use it in their Gyu-il-go (揆日考) and Ui-gi-jip-seol (儀器輯說), respectively. According to Gyu-il-go (揆日考) there are two horizontal plates and two vertical plates that have lines of season and time. Subseasonal (節候) lines are engraved between seasonal (節氣) lines, subdividing the interval into three equal lines of Cho-hu (初候, early subseason), Jung-hu (中候, mid subseason) and Mal-hu (末候, late subseason); there are 13 seasonal lines for a year, thus resulting in 37 subseasonal lines; also, there are 12 double-hour (時辰) lines for a day engraved on these plates. The only remaining artifact of Yang-gyeong-gyu-il-ui was made in 1849 (the 15th year of Heon-jong) and is kept at the Korea University Museum. We have compared and analyzed Yanggyeong- gyu-il-ui and similar western sundials. Also, we have reviewed the scientific aspect of this artifact and built a replica. Yang-gyeong-gyu-il-ui is a new model enhanced from the miniaturization development in the early Joseon Dynasty and can be applied to the southern part of the tropic line through a structure change.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n1/OJOOBS_2015_v32n1_73.pdfYang-gyeong-gyu-il-ui(兩景揆日儀)Hoeng-pyo-ip-pyo-il-gu(橫表立表日晷)Sang-hyeok LeeByeong-cheol Namsundialelevation dial |
| spellingShingle | Yong Sam Lee Sang Hyuk Kim Byeong-Hee Mihn A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty Journal of Astronomy and Space Sciences Yang-gyeong-gyu-il-ui(兩景揆日儀) Hoeng-pyo-ip-pyo-il-gu(橫表立表日晷) Sang-hyeok Lee Byeong-cheol Nam sundial elevation dial |
| title | A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty |
| title_full | A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty |
| title_fullStr | A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty |
| title_full_unstemmed | A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty |
| title_short | A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty |
| title_sort | study of the yang gyeong gyu il ui 兩景揆日儀 in the joseon dynasty |
| topic | Yang-gyeong-gyu-il-ui(兩景揆日儀) Hoeng-pyo-ip-pyo-il-gu(橫表立表日晷) Sang-hyeok Lee Byeong-cheol Nam sundial elevation dial |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n1/OJOOBS_2015_v32n1_73.pdf |
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