HD 29678

HD 29678
Location of HD 29678 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 48m 50.35317s[1]
Declination +75° 56′ 28.3916″[1]
Apparent magnitude (V) 5.95±0.01[2]
Characteristics
Evolutionary stage main sequence star[1]
Spectral type A9/F0 IV[3] or A6 V[4]
U−B color index −0.04[5]
B−V color index +0.27[5]
Astrometry
Radial velocity (Rv)−6.0±3.7[6] km/s
Proper motion (μ) RA: +37.476 mas/yr[1]
Dec.: −133.853 mas/yr[1]
Parallax (π)21.0142 ± 0.0265 mas[1]
Distance155.2 ± 0.2 ly
(47.59 ± 0.06 pc)
Absolute magnitude (MV)+2.60[7]
Details
Mass1.54[8] M☉
Radius1.73±0.09[9] R☉
Luminosity7.54+0.04
−0.06[1] L☉
Surface gravity (log g)4.20+0.09
−0.07[10] cgs
Temperature7,502±255[8] K
Metallicity [Fe/H]−0.26[11] dex
Rotational velocity (v sin i)120[12] km/s
Age146[8] Myr
Other designations
AG+75°168, BD+75°189, FK5 173, GC 5774, HD 29678, HIP 22361, HR 1491, SAO 5309, CCDM J04489+7557A, WDS J04488+7556A, TIC 140682376[13]
Database references
SIMBADdata

HD 29678, also known as HR 1491, is a solitary star[14] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as a yellowish-white hued point of light with an apparent magnitude of 5.95.[2] The object is located relatively close at a distance of 155 light-years[1] and it is drifting closer with a somewhat constrained heliocentric radial velocity of approximately −6.0 km/s.[6] At is current distance, HD 29678's brightness is diminished by 0.13 magnitudes due to interstellar extinction and it has an absolute magnitude of +2.60.[7] Its observed kinematics suggest that it is a member of the Pleiades supercluster.[15]

HD 29678 has a stellar classification of A9/F0 IV,[3] indicating that it is a slightly evolved star that has the characteristics of an A9 and F0 subgiant. Adams et al. (1935) yields a class of A6 V,[4] indicating that it is instead a hotter A-type main-sequence star that is generating energy via hydrogen fusion at is core. It has 1.54 times the mass of the Sun[8] and 1.73 times the radius of the Sun.[9] It radiates 7.54 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 7,502 K.[8] The above characteristics more closely match a main sequence star and Gaia DR3 models the object as such.[1] HD 29678 is metal-deficient with an iron abundance of [Fe/H] = −0.26 or 55% of the Sun's[11] and it is estimated to be 146 million years old.[8] Like many hot stars it spins rapidly, having a projected rotational velocity of 120 km/s.[12]

HD 29678 has a 13th magnitude optical companion located 98.6" away along a position angle of 46°.[16] HD 29678 itself is an unrelated field star of the HIP 21974 cluster.[17]

  1. ^ a b c d e f g h i 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 Cite error: The named reference Cowley1976 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Adams1935 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Imagawa1967 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Kharchenko2007 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 e f Cite error: The named reference David2015 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 Anders2019 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Danziger1972 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference DeRosa2013 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Mason2001 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference CanatGaudin2018 was invoked but never defined (see the help page).