HD 29559

HD 29559
Observation data
Epoch J2000      Equinox J2000
Constellation Caelum
Right ascension 04h 37m 19.2681s[1]
Declination −41° 52′ 22.5964″[1]
Apparent magnitude (V) 6.40±0.01[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A5 IV-V[4]
B−V color index +0.15[2]
Astrometry
Radial velocity (Rv)24.2±0.8[5] km/s
Proper motion (μ) RA: +25.296 mas/yr[1]
Dec.: +49.716 mas/yr[1]
Parallax (π)7.9974 ± 0.0193 mas[1]
Distance407.8 ± 1.0 ly
(125.0 ± 0.3 pc)
Absolute magnitude (MV)+1.03[6]
Details
Mass2.19±0.04[3] M☉
Radius3.17±0.08[7] R☉
Luminosity35±3[3] L☉
Surface gravity (log g)3.7±0.1[7] cgs
Temperature7,852±36[3] K
Metallicity [Fe/H]−0.01[8] dex
Rotational velocity (v sin i)176±5[9] km/s
Age719[8] Myr
Other designations
8 G. Caeli, CD−42°1572, CPD−42°507, GC 5653, HD 29559, HIP 21525, SAO 216899[10][11]
Database references
SIMBADdata

HD 29559 is a solitary star in the southern constellation Caelum. It has an apparent magnitude of 6.40,[2] placing it near the max naked eye visibility. The star is situated at a distance 408 light years[1] based on parallax measurements but is receding with a heliocentric radial velocity of 24.2 km/s.[5]

HD 29559 has a stellar classification of A5 IV-V[4] — a luminosity class intermediate between a main sequence star and subgiant. It has alternatively been classified as A3 Vs:,[12] indicating that it is an A-type main-sequence star with sharp (narrow) absorption lines due to slow rotation. However, there is uncertainty behind the class.

It has 2.19 times the mass of the Sun[3] and a slightly enlarged diameter of 3.17 R☉.[7] It radiates at 35 times the luminosity of the Sun from its photosphere at an effective temperature of 7,852 K,[3] which gives it a white hue. Contrary to the second classification, HD 29559 spins rapidly with a projected rotational velocity of 176 km/s[9] and has a solar metallicity.[8] It is estimated to be 719 million years old,[8] having completed 85.9% of its main sequence lifetime.[3]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c d e f g Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gray1989 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference TESS was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Houk1978 was invoked but never defined (see the help page).