Surf Wiki
Save to docs
general/k-type-giants

From Surf Wiki (app.surf) — the open knowledge base

Eta Serpentis

Star in the constellation Serpens

Star in the constellation Serpens

| x%=43.2 | y%=40.1 | b-v = +0.940 | u-b = +0.643

Eta Serpentis, Latinized from η Serpentis, is a star in the constellation Serpens. In particular, it lies in Serpens Cauda, the snake's tail, and is the brightest in that part of the constellation. The star has an apparent visual magnitude of 3.260, making it visible to the naked eye. Parallax measurements give a distance estimate of 60.5 ly from the Earth.

This star is larger than the Sun, with 1.6 times the mass and almost six times the radius. The spectrum matches a stellar classification of K0 III-IV, with the luminosity class of III-IV corresponding to an evolved star that lies between the subgiant and giant stages. The expanded outer envelope star is radiating about 18 times the luminosity of the Sun at an effective temperature of . At this temperature, it has an orange hue typical of a K-type star. Eta Serpentis displays solar-like oscillations with a period of 0.09 of a day.

Eta Serpentis was previously classified as a carbon star, which would have made it the brightest carbon star in the sky, although this classification was since found to be erroneous.

Eta Serpentis is currently 1.6 light-years away from Gliese 710.

Name

In Chinese astronomy, the star is known as 天市左垣 (Tiān Shì Zuǒ Yuán), meaning 'Left Wall of Heavenly Market Enclosure'; the name refers to an asterism that represents eleven old states in China. The leftmost borderline of the enclosure consists of η Serpentis, δ Herculis, λ Herculis, μ Herculis, o Herculis, 112 Herculis, η Ophiuchi, ζ Aquilae, θ1 Serpentis, ν Ophiuchi and ξ Serpentis. Consequently, the Chinese name for η Serpentis itself is 天市左垣八 (Tiān Shì Zuǒ Yuán bā, the Eighth Star of Left Wall of Heavenly Market Enclosure, representing the region of Donghai (東海, lit. meaning 'eastern sea').

References

References

  1. (2001). "The chemical composition of the red giant η Ser". Astronomy Reports.
  2. {{in lang. zh ''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.
  3. {{in lang. zh [http://aeea.nmns.edu.tw/2006/0606/ap060623.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 23 日] {{Webarchive. link. (2021-05-15)
  4. {{in lang. zh [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/e_research_chinengstarzone_b.htm#HeavenlyMarketEnclosure English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name] {{webarchive. link. (August 10, 2010 , Hong Kong Space Museum. Accessed on line November 23, 2010.)
  5. van Leeuwen, F.. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  6. (2010-07-01). "Red-giant seismic properties analyzed with CoRoT". Astronomy & Astrophysics.
  7. Luck, R. Earle. (2017-01-01). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal.
  8. (2018-07-01). "The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample". Astronomy and Astrophysics.
  9. (2014-01-13). "Navy Precision Optical Interferometer Measurements of 10 Stellar Oscillators". The Astrophysical Journal.
  10. (December 2009). "REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters". Astronomy and Astrophysics.
  11. (2024-02-01). "Gaia FGK benchmark stars: Fundamental Teff and log g of the third version". Astronomy and Astrophysics.
  12. (1999). "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions". Astronomisches Rechen-Institut Heidelberg.
  13. (1984). "Standardization of Broadband Photometry of Equatorial Standards". South African Astronomical Observatory Circulars.
  14. (July 2010). "Interferometric radius and limb darkening of the asteroseismic red giant η Serpentis with the CHARA Array". Astronomy and Astrophysics.
  15. (December 2010). "Period-luminosity relations of pulsating M giants in the solar neighbourhood and the Magellanic Clouds". [[Monthly Notices of the Royal Astronomical Society]].
  16. (December 21, 2004). "The Colour of Stars". [[Commonwealth Scientific and Industrial Research Organisation]].
  17. "eta Ser -- Variable Star". [[Centre de Données astronomiques de Strasbourg]].
  18. (March 2008). "Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars". The Astronomical Journal.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

k-type-giants serpens bayer-objects durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects gliese-and-gj-objects
Want to explore this topic further?

Ask Mako anything about Eta Serpentis — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report