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Psi Andromedae

Triple star system in the constellation Andromeda

Triple star system in the constellation Andromeda

| b-v = +1.085 | u-b = +0.83

Psi Andromedae (ψ And, ψ Andromedae) is the Bayer designation for a triple star system in the northern constellation of Andromeda. The combined apparent visual magnitude of this system is 4.95. Based upon parallax measurements, is roughly 2000 ly from Earth.

The primary component has a stellar classification of G5 Ib, which matches the spectrum of an evolved supergiant star. It forms a pair with a star of type B9 with an unknown luminosity class separated by 0.28 arcseconds. A third component has a separation of 0.14 arcseconds. Details of the orbital arrangement remain uncertain.

Naming

In Chinese, 螣蛇 (Téng Shé), meaning Flying Serpent, refers to an asterism consisting of ψ Andromedae, α Lacertae, 4 Lacertae, π2 Cygni, π1 Cygni, HD 206267, ε Cephei, β Lacertae, σ Cassiopeiae, ρ Cassiopeiae, τ Cassiopeiae, AR Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae and ι Andromedae,. Consequently, the Chinese name for ψ Andromedae itself is 螣蛇二十 (Téng Shé èrshí, ).

References

References

  1. "* psi And".
  2. {{in lang. zh [http://aeea.nmns.edu.tw/2006/0607/ap060707.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日] {{Webarchive. link. (2011-05-21)
  3. {{Cite Gaia EDR3. 1938979585834537728
  4. (March 2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics.
  5. (1966). "UBV photometry of 550 F, G and K type stars". [[Monthly Notices of the Royal Astronomical Society]].
  6. (June 2025). "Vintage NPOI: New and Updated Angular Diameters for 145 Stars". The Astronomical Journal.
  7. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society.
  8. (May 2004). "New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions". The Astronomical Journal.
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andromeda-(constellation) spectroscopic-binaries g-type-supergiants bayer-objects flamsteed-objects hipparcos-objects bright-star-catalogue-objects henry-draper-catalogue-objects durchmusterung-objects
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