HD 23079

HD 23079 / Tupi
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Reticulum
Right ascension 03h 39m 43.0961s[1]
Declination −52° 54′ 57.0161″[1]
Apparent magnitude (V) 7.12[2]
Characteristics
Spectral type F9.5V[3]
B−V color index 0.583±0.009[2]
Astrometry
Radial velocity (Rv)+0.648±0.0004[1] km/s
Proper motion (μ) RA: −192.877±0.060[1] mas/yr
Dec.: −92.103±0.062[1] mas/yr
Parallax (π)29.8583 ± 0.0309 mas[1]
Distance109.2 ± 0.1 ly
(33.49 ± 0.03 pc)
Absolute magnitude (MV)4.47[2]
Details[4]
Mass1.01±0.02 M☉
Radius1.08±0.02 R☉
Luminosity1.372±0.005 L☉
Surface gravity (log g)4.37±0.04 cgs
Temperature6,003±36 K
Metallicity [Fe/H]−0.12±0.01[2] dex
Rotational velocity (v sin i)1.281±0.160[5] km/s
Age5.1±1.0 Gyr
Other designations
Tupi, CD–53°738, GC 4401, HD 23079, HIP 17096, SAO 233208, LTT 1739[6]
Database references
SIMBADdata

HD 23079 is a star in the southern constellation of Reticulum. Since the star has an apparent visual magnitude of 7.12,[2] it is not visible to the naked eye, but at least in binoculars it should be easily visible. Parallax measurements give a distance estimate of 109 light years from the Sun. it is slowly drifting further away with a radial velocity of +0.65 km/s.[1]

This object is an inactive F-type main sequence star with a stellar classification of F9.5V;[3] in between F8 and G0. This indicates it is generating energy through core hydrogen fusion. The star is similar to the Sun, but is slightly hotter and more massive.[7] It is about 5.1 billion years old[4] and it is spinning slowly with a projected rotational velocity of 1.3 km/s.[5] The metallicity of this star is below solar, meaning the abundance of elements other than hydrogen and helium is lower than in the Sun.[2]

The star HD 23079 is named Tupi. The name was selected in the NameExoWorlds campaigns by Brazil during the 100th anniversary of the IAU. The star is named after the Tupi people, an indigenous group.[8][9]

  1. ^ a b c d e f g Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Soto2018 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eberle2011 was invoked but never defined (see the help page).
  8. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  9. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.