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Chi1 Fornacis

For other stars with a similar Bayer designation, see χ Fornacis.
χ1 Fornacis
Location of χ1 Fornacis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Fornax
Right ascension 03h 25m 55.84196s[1]
Declination −35° 55′ 15.1876″[1]
Apparent magnitude (V) 6.39±0.01[2]
Characteristics
Evolutionary stage main sequence star[3]
Spectral type A1 IV[4]
B−V color index +0.08[5]
Astrometry
Radial velocity (Rv)19.0±0.5[6] km/s
Proper motion (μ) RA: +36.770 mas/yr[1]
Dec.: −4.641 mas/yr[1]
Parallax (π)9.6154 ± 0.0266 mas[1]
Distance339.2 ± 0.9 ly
(104.0 ± 0.3 pc)
Absolute magnitude (MV)+1.42[7]
Details
Mass2.05±0.08[8] M☉
Radius2.20±0.11[9] R☉
Luminosity31.24+3.43
−3.09[3] L☉
Surface gravity (log g)4.08±0.07[10] cgs
Temperature8,770+122
−120[3] K
Metallicity [Fe/H]0.00+0.02
−0.04[8] dex
Rotational velocity (v sin i)136[11] km/s
Age5.5±0.5[12] Myr
Other designations
χ1 For, 89 G. Fornacis[13], NSV 1162, CD−36°1290, CPD−36°350, GC 4097, HD 21573, HIP 15987, HR 1042, SAO 194289[14]
Database references
SIMBADFor data

Chi1 Fornacis, Latinised from χ1 Fornacis is a solitary white-hued star located in the southern constellation Fornax. Its barley visible to the naked eye with an apparent magnitude of 6.39,[2] which is near the limit for naked eye visibility. Gaia DR3 parallax measurements imply a distance of 339 light-years[1] and it is currently drifitng away with a heliocentric radial velocity of 19.0 km/s.[6] At its current distance, Chi1 Fornacis' brightness is diminshed by an interstellar extinction of 0.08 magnitudes[15] and it has an absolute magnitude of +1.42.[7]

Chi1 Fornacis has a stellar classification of A1 IV,[4] indicating that it is a slightly evolved A-type star that is ceasing hydrogen fusion at its core. Alternatively, it has been given a class of A1 Vbn,[16] indicating that it is instead a slightly less luminous A-type main-sequence star with broad or nebulous absorption lines due to rapid rotation. It has 2.05 times the mass of the Sun[8] and 2.20 times the radius of the Sun.[9] It radiates 31.24 times the luminosity of the Sun from its photosphere at an effective temperature of 8,870 K.[3] Chi1 Fornacis has a solar metallicity[8] and it is estimated to be only 5.5 million years old.[12] It spins rapidly with a projected rotational velocity of 136 km/s.[11]

It is the brightest star and titular member in the χ1 Fornacis cluster, a star cluster around 104 parsecs from Earth.[17]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Bochanski2018 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Ujjwal2020 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Paunzen2001 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference harvard was invoked but never defined (see the help page).

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