HD 23474

HD 23474
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Mensa
Right ascension 03h 36m 30.1435s[1]
Declination −78° 19′ 23.0623″[1]
Apparent magnitude (V) 6.30±0.01[2]
Characteristics
Spectral type K2 III[3]
U−B color index +1.03[4]
B−V color index +1.15[4]
Astrometry
Radial velocity (Rv)2.4±0.4[5] km/s
Proper motion (μ) RA: −14.12 mas/yr[1]
Dec.: +6.67 mas/yr[1]
Parallax (π)4.34 ± 0.36 mas[1]
Distance750 ± 60 ly
(230 ± 20 pc)
Absolute magnitude (MV)−0.50[6]
Details
Mass1.21[7] M☉
Radius33.51±7.44[8] R☉
Luminosity227[9] L☉
Surface gravity (log g)1.22[8] cgs
Temperature4,556[9] K
Metallicity [Fe/H]−0.03[7] dex
Rotational velocity (v sin i)1.2±1.3[10] km/s
Other designations
3 G. Mensae, CPD−78°105, FK5 2261, GC 4400, HD 23474, HIP 16827, HR 1154, SAO 256005, WDS J03365-7819AB[11][12]
Database references
SIMBADdata

HD 23474 (HR 1154) is a double star[13] in the southern circumpolar constellation Mensa. It has an apparent magnitude of 6.30, placing it near the max naked eye visibility. The system is situated at a distance of about 750 light years and is currently receding with a heliocentric radial velocity of 2.4 km/s.

As of 2018, the pair have a separation of 0.2 arcseconds along a position angle of 92°.[13]

The primary or visible component has a stellar classification of K2 III, indicating that it is a red giant. As a result, it has expanded to a diameter of 33.51 R☉[8] and has an effective temperature of 4,556 K,[9] giving an orange hue. It has 121% the mass of the Sun and shines with a luminosity of 227 L☉[9] from its enlarged photosphere. HD 23474 spins with a poorly constrained projected rotational velocity of 1.2 km/s[10] and has a metallicity around solar level.[7]

  1. ^ a b c d Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Stassun2018 was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference DeMederios2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference Mason2001 was invoked but never defined (see the help page).