Chi Virginis

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Star in the constellation Virgo

title: "Chi Virginis" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["bayer-objects", "flamsteed-objects", "virgo-(constellation)", "k-type-giants", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects", "durchmusterung-objects", "planetary-systems-with-two-confirmed-planets"] description: "Star in the constellation Virgo" topic_path: "general/bayer-objects" source: "https://en.wikipedia.org/wiki/Chi_Virginis" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Virgo ::

| name = χ Virginis | image= |image=Virgo constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=χ Virginis |x=610|y=636 |caption=Location of χ Virginis (circled) | epoch = J2000.0 | constell = Virgo | ra = | dec = | appmag_v = 4.652 | class = K2 III | r-i = | v-r = | b-v = +1.239 | u-b = +1.389 | variable = | radial_v = | prop_mo_ra = −77.223 | prop_mo_dec = −24.409 | parallax = 10.3526 | p_error = 0.1151 | parallax_footnote = | absmag_v = | source = | mass = | radius = | luminosity = 107 | temperature = | gravity = | metal = | rotational_velocity = | age_gyr = | names = 26 Virginis, BD−07°3452, GC 17227, GCRV 7604, HD 110014, HIP 61740, HR 4813, PPM 195694, SAO 138892. | Simbad = HD+110014 | NSTED = HD+110014 | EPE = HD+110014

Chi Virginis (χ Vir, χ Virginis) is a double star in the constellation Virgo. Based upon parallax measurements, it is approximately 315 ly from Earth. It has an apparent visual magnitude of 4.65, which is bright enough to be seen with the unaided eye under suitable viewing conditions.

This star has a stellar classification of K2 III, with the luminosity class "III" indicating that this is a giant star that has consumed the hydrogen at its core and evolved away from the main sequence. It has a mass about double that of the Sun and has expanded to 20 times the Sun's radius, giving it a luminosity of 107 times the luminosity of the Sun. The effective temperature of the star's outer envelope is about 4,559 K, which gives the star the orange hue typical of K-type stars. The abundance of elements other than hydrogen and helium, what astronomers term the star's metallicity, is slightly higher than in the Sun.

This star has three optical companions. At an angular separation of 173.1 arcseconds is a magnitude +9.1 star, which is of spectral type K0. A 10th magnitude star is located 221.2 arcseconds away, and the third is a magnitude +9.1 K2 star 321.2 arcseconds away. None of these have been confirmed as a physical companion.

Planetary system

In July 2009, it was discovered that Chi Virginis has a massive planet with a high orbital eccentricity of 0.46. It is orbiting with a period of about 835 days and has a mass at least 11 times greater than Jupiter. There are indications of a second planet orbiting with a period of 130 days, but this has not been firmly established.

In May 2015, the existence of a second planet candidate, , (Chi Virginis c, about three times the mass of Jupiter and having an orbit roughly that of Venus) was announced by Chilean astronomer Maritza Soto. The two-planet model could not be confirmed, and the radial velocity variations attributed to the second planet might instead be caused by a starspot. A 2021 review of planets around giant stars lists this second planet as "questionable".

| table_ref = | exoplanet = c | mass = | period = | semimajor = | eccentricity = | exoplanet = b | mass = | period = | semimajor = | eccentricity =

References

References

  1. {{cite Gaia DR3. 3676091134604409728
  2. (2008). "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity". [[The Astronomical Journal]].
  3. Buscombe, W.. (1962). "Spectral classification of Southern fundamental stars". Mount Stromlo Observatory Mimeogram.
  4. (1966). "A System of photometric standards". Publicaciones Universidad de Chile, Department de Astronomy.
  5. (2009). "A planet around the evolved intermediate-mass star HD 110014". [[Astronomy and Astrophysics]].
  6. "chi Vir -- Star in double system". [[Centre de Données astronomiques de Strasbourg]].
  7. Jofré, E.. (2015-02-01). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy and Astrophysics.
  8. (2008). "A catalogue of multiplicity among bright stellar systems". [[Monthly Notices of the Royal Astronomical Society]].
  9. (2006). "Basic physical parameters of a selected sample of evolved stars". [[Astronomy and Astrophysics]].
  10. (December 21, 2004). "The Colour of Stars". Commonwealth Scientific and Industrial Research Organisation.
  11. (August 2015). "RAFT - I. Discovery of new planetary candidates and updated orbits from archival FEROS spectra". Monthly Notices of the Royal Astronomical Society.
  12. (September 2021). "A Sanity Check for Planets around Evolved Stars". [[The Astrophysical Journal Supplement Series]].

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bayer-objectsflamsteed-objectsvirgo-(constellation)k-type-giantshenry-draper-catalogue-objectshipparcos-objectsbright-star-catalogue-objectsdurchmusterung-objectsplanetary-systems-with-two-confirmed-planets