| 词条 | Delta Serpentis |
| 释义 |
name=δ Serpentis | epoch=J2000.0 | constell=Serpens | ra=15h 34m 48.1s | dec=+10° 32' 15" | spectral='''AB''': F0IV + F0IV | appmag_v=''combined'': +3.80 }} Delta Serpentis (δ Serpentis, δ Ser) is a star system in the constellation Serpens, in its head (Serpens Caput). PropertiesIt is approximately 210 light years from Earth. The light from the four stars in the system give a combined apparent magnitude of +3.80. The system consists of a pair of binary stars separated by 66 arcseconds. The primary component, Delta Serpentis A, is a yellow-white F-type subgiant with an apparent magnitude of +4.2. It is classified as a Delta Scuti type variable star and its magnitude varies by 0.04 with a period of 0.134 days. Its binary companion, Delta Serpentis B, is also a F-type subgiant which is slightly dimmer, with a magnitude of +5.2. A and B are separated by four arcseconds on the sky, and perform one orbit around their centre of mass once every 3200 years. The 14th magnitude stars Delta Serpentis C and 15th magnitude Delta Serpentis D form the second binary sub-system. They are separated from each other by 4.4 arcseconds. NamingIt was a member of indigenous Arabic asterism al-Nasaq al-Yamānī, "the Southern Line" of al-Nasaqān "the Two Lines".,[1] along with α Ser (Unukalhai), ε Ser (Ba, Pa), δ Oph (Yed Prior), ε Oph (Yed Posterior), ζ Oph (Han) and γ Oph (Tsung Ching).[2] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, al-Nasaq al-Yamānī or Nasak Yamani were the title for two stars :δ Ser as Nasak Yamani I and ε Ser as Nasak Yamani II (exclude α Ser, δ Oph, ε Oph, ζ Oph and γ Oph)[3] In Chinese, {{lang|zh|天市右垣}} ({{lang|zh-Latn|Tiān Shì Yòu Yuán}}), meaning Right Wall of Heavenly Market Enclosure, refers to an asterism which is represent eleven old states in China which is marking the right borderline of the enclosure, consisting of δ Serpentis, β Herculis, γ Herculis, κ Herculis, γ Serpentis, β Serpentis, α Serpentis, ε Serpentis, δ Ophiuchi, ε Ophiuchi and ζ Ophiuchi.[4] Consequently, δ Serpentis itself is known as {{lang|zh|天市右垣六}} ({{lang|zh-Latn|Tiān Shì Yòu Yuán liù}}, {{lang-en|the Sixth Star of Right Wall of Heavenly Market Enclosure}}), represent the state Qin (秦) (or Tsin),[5][6][7] together with θ Capricorni and 30 Capricorni (according to Ian Ridpath version[8]) in Twelve States (asterism).[9] References1. ^{{cite book | last=Kunitzsch, P. | first=Smart, T., | year=2006 | authorlink= | title=A Dictionary of Modern Star names: A Short Guide to 254 Star names and Their Derivations | edition=Second Revised | publisher=Sky Publishing | location=Cambridge, MA | isbn=1-931559-44-9 | page=31}} {{Stars of Serpens}}2. ^{{cite book | last=Allen | first=R. H. | year=1963 | authorlink=Richard Hinckley Allen | title=Star Names: Their Lore and Meaning | url=http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Hercules*.html | accessdate=2010-12-12 | edition=Reprint | publisher=Dover Publications Inc | location=New York, NY | isbn=0-486-21079-0 | page=243 }} 3. ^[https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971] 4. ^{{zh icon}} 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}. 5. ^Star Names - R.H.Allen p.376 6. ^{{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 24 日 7. ^{{zh icon}} English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name {{webarchive |url=https://web.archive.org/web/20100810114313/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/e_research_chinengstarzone_b.htm#HeavenlyMarketEnclosure |date=August 10, 2010 }}, Hong Kong Space Museum. Accessed on line November 23, 2010. 8. ^Ian Ridpath's Startales - Capricornus the Sea Goat 9. ^Star Names - R.H.Allen p.142 10 : Bayer objects|Serpens (constellation)|Multiple star systems|Delta Scuti variables|F-type subgiants|Flamsteed objects|Hipparcos objects|HR objects|Henry Draper Catalogue objects|Durchmusterung objects |
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