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94 Ceti

Trinary star system in the constellation Cetus

Trinary star system in the constellation Cetus

| b-v = +0.56 | u-b = +0.09

94 Ceti (HD 19994) is a trinary star system approximately 73 light-years away in the constellation Cetus.

94 Ceti A is a yellow-white dwarf star with about 1.3 times the mass of the Sun while 94 Ceti B and C are red dwarf stars.

An infrared excess has been detected around the primary, most likely indicating the presence of a circumstellar disk at a radius of 95 AU. The temperature of this dust is 40 K.

Stellar system

This system is a hierarchical triple star system with 94 Ceti A being orbited by 94 Ceti BC, a pair of M dwarfs, in 2000 years. 94 Ceti B and C meanwhile orbit each other in a 1-year orbit.

Planetary system

On 7 August 2000, a planet was announced by the Geneva Extrasolar Planet Search team as a result of radial velocity measurements taken with the Swiss 1.2-metre Leonhard Euler Telescope at La Silla Observatory in Chile. It is most stable if its inclination is either 65 or 115, ± 3.

References

References

  1. Høg, E.. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics.
  2. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data.
  3. Nidever, David L.. (2013). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series.
  4. {{cite XHIP. 14954
  5. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics.
  6. (2008). "Nearby stars of the Galactic disc and halo - IV". [[Monthly Notices of the Royal Astronomical Society]].
  7. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". [[Astronomy and Astrophysics]].
  8. (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". [[The Astrophysical Journal]].
  9. (2013). "Analysis of the motion of an extrasolar planet in a binary system". The Astronomical Journal.
  10. Röll, Tristan Alexander. (2011). "Astrometric search for extrasolar planets in stellar multiple systems". Friedrich-Schiller-University Jena.
  11. (7 August 2000). "European Southern Observatory: Six Extrasolar Planets Discovered". SpaceRef.com.
  12. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  13. (2016). "94 Ceti: A triple star with a planet and dust disc". Monthly Notices of the Royal Astronomical Society.
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cetus f-type-main-sequence-stars m-type-main-sequence-stars binary-stars flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects durchmusterung-objects gliese-and-gj-objects planetary-systems-with-one-confirmed-planet
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