View source for Jiantai

{{DISPLAYTITLE: Jiantai (渐台)}}
Authors: {{PAGEAUTHORS}}
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[[File:Zhinü (right), Jiantai (lower) and Niandao (upper left).png|alt=Zhinü (right), Jiantai (lower) and Niandao (upper left)|thumb|''Zhinü'' (right), '''''Jiantai''''' (lower) and ''Niandao'' (upper left)]]
Jiàn Tái (Clepsydra Terrace, 渐台), Chinese constellation consists of 4 stars, belongs to the Ox (Niu) Lunar Mansion, the Gan school, and corresponds to the modern constellation [[Lyra]]. Jiantai is a terrace built near water, used for observing sundials, timing with water clocks, and establishing pitch pipes and temperaments. It is a symbol of astronomical timekeeping and musical pitch calibration.

== Concordance, Etymology, History ==
A platform with four square sides is called 'tai' (台); if it has water below, it is called 'jian' (渐). Jiantai governs the gnomon, the water clock, and the affairs of pitch pipes and temperaments. ''Ganshi Zan'' (甘氏赞) says:<blockquote>Jiantai guards the water clock and the gnomon.</blockquote>''Gande'' (甘德) said:<blockquote>Jiantai is in charge of guarding the water clock, and calamities, as well as the Nine Regions (Jiuzhou) and their corresponding field allocations.</blockquote>Jiantai is also "the courtyard where thousands of essences gather". Anomalies in different seasons correspond respectively to warfare (spring), funerals (summer), famine and floods (autumn), and banditry and punishments (winter). It is a constellation that ancient people observed to foretell national fortunes by watching the celestial seasons.
 
=== Identification of stars ===
{| class="wikitable"
|+
!Star Names or Orders(Qing)
!Ho PENG YOKE<ref>P.-Y. Ho, “Ancient And Mediaeval Observations of Comets and Novae in Chinese Sources,” ''Vistas in Astronomy'', 5(1962), 127-225.</ref>
!Yi Shitong<ref>Yi Shitong伊世同. ''Zhongxi Duizhao Hengxing Tubiao''中西对照恒星图表1950. Beijing: Science Press.1981: 56.</ref>
Based on catalogue in 18th century
!Pan Nai<ref name=":0">Pan Nai潘鼐. ''Zhongguo Hengxing Guance shi''中国恒星观测史[M]. Shanghai: Xuelin Pree. 1989. p226.</ref>
based on Xinyixiangfayao Star Map
!Pan Nai<ref>Pan Nai潘鼐. ''Zhongguo Hengxing Guance shi''中国恒星观测史[M]. Shanghai: Xuelin Pree. 2009. p443.</ref>
based on catalogues in Yuan dynasty
!SUN X. & J. Kistemaker<ref>Sun Xiaochun. & Kistemaker J. ''The Chinese sky during the Han''. Leiden: Brill. 1997, Pp241-6.</ref>
Han Dynasty
!Boshun Yang<ref name=":1">B.-S. Yang杨伯顺, ''Zhongguo Chuantong Hengxing Guance Jingdu ji Xingguan Yanbian Yanjiu'' 中国传统恒星观测精度及星官演变研究 (A Research on the Accuracy of Chinese Traditional Star Observation and the Evolution of Constellations), PhD thesis, (Hefei: University of Science and Technology of China, 2023). 261.</ref>
before Tang dynasty
|-
| 1st
| δ2 Lyr
| δ2 Lyr
| δ2 Lyr
| δ2 Lyr
| δ2 Lyr
| δ2 Lyr
|-
| 2nd
| β Lyr
| β Lyr
| β Lyr
| β Lyr
| β Lyr
| β Lyr (Determinative)
|-
| 3rd
| γ Lyr
| γ Lyr
| γ Lyr (Determinative)
| γ Lyr
| γ Lyr
| γ Lyr
|-
|4th
| ι Lyr
| ι Lyr
| ι Lyr
| ι Lyr
| ι Lyr
| ι Lyr
|}

=== Maps (Gallery) ===
{| class="wikitable"
|+
!historical map
!modern identification
(Yang 2023)
!same in Stellarium 24.4
|-
|[[File:Zhinü in Cheonsang Yeolcha Bunyajido Star Chart.png|alt=Zhinü, Jiantai and Niandao in Cheonsang Yeolcha Bunyajido Star Chart|thumb|Zhinü, Jiantai and Niandao in ''Cheonsang Yeolcha Bunyajido'' Star Chart]]
|[[File:Zhinü, Jiantai and Niandao before Tang dynasty reconstructed by Boshun Yang (2023).png|alt=Zhinü, Jiantai and Niandao before Tang dynasty reconstructed by Boshun Yang (2023)|thumb|Zhinü, Jiantai and Niandao before Tang dynasty reconstructed by Boshun Yang (2023)]]
| rowspan="2" |[[File:Zhinü (right), Jiantai (lower) and Niandao (upper left).png|alt=Zhinü (right), Jiantai (lower) and Niandao (upper left)|thumb|''Zhinü'' (right), '''''Jiantai''''' (lower) and ''Niandao'' (upper left) bofore later Ming dynasty]]
|-
|[[File:Zhinü, Jiantai and Niandao in Xin yixiang fayao Star Map.png|alt=Zhinü, Jiantai and Niandao in Xin yixiang fayao Star Map|thumb|Zhinü, Jiantai and Niandao in ''Xin yixiang fayao'' Star Map]][[File:Zhinü, Jiantai and Niandao in Suzhou Star Map.png|alt=Zhinü, Jiantai and Niandao in Suzhou Star Map|thumb|Zhinü, Jiantai and Niandao in Suzhou Star Map]]
|[[File:Zhinü, Jiantai and Niandao in Song Dynasty reconstructed by Pan Nai (2009).png|alt=Zhinü, Jiantai and Niandao in Song Dynasty reconstructed by Pan Nai (2009)|thumb|Zhinü, Jiantai and Niandao in Song Dynasty reconstructed by Pan Nai (2009)]]
|-
|[[File:Zhinü, Jiantai and Niandao in Yixiang kaocheng Stat Map (18th century).png|alt=Zhinü, Jiantai and Niandao in Yixiang kaocheng Stat Map (18th century)|thumb|Zhinü, Jiantai and Niandao in ''Yixiang kaocheng'' Stat Map (18th century)]]
|[[File:Zhinü, Jiantai and Niandao in 18th Century Reconstructed by YI Shitong (1981).png|alt=Zhinü, Jiantai and Niandao in 18th Century Reconstructed by YI Shitong (1981)|thumb|Zhinü, Jiantai and Niandao in 18th Century Reconstructed by YI Shitong (1981)]]
|[[File:Zhinü, Jiantai and Niandao in 18th Century in Stellarium.png|alt=Zhinü, Jiantai and Niandao in 18th Century in Stellarium|thumb|Zhinü, Jiantai and Niandao in 18th Century in Stellarium]]
|}


== IAU Working Group on Star Names ==
In 202x, the name of the historical constellation "xxx" was suggested to be used for one of the stars in this constellation. ...

Decision: ... 

==References ==
[[References (Chinese)]]


[[Category:Asterism ]]
[[Category:Constellation ]]
[[Category:Eurasia]]
[[Category:Asian]]
[[Category:East Asian]]
[[Category:Chinese ]]
[[Category:Lyr]]