HD 29678
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  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 04h 48m 50.35317s[2] |
| Declination | +75° 56′ 28.3916″[2] |
| Apparent magnitude (V) | 5.95±0.01[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | A9/F0 IV[4] or A6 V[5] |
| U−B color index | −0.04[6] |
| B−V color index | +0.27[6] |
| Astrometry | |
| Radial velocity (Rv) | −6.0±3.7[7] km/s |
| Proper motion (μ) | RA: +37.476 mas/yr[2] Dec.: −133.853 mas/yr[2] |
| Parallax (π) | 21.0142±0.0265 mas[2] |
| Distance | 155.2 ± 0.2 ly (47.59 ± 0.06 pc) |
| Absolute magnitude (MV) | +2.60[1] |
| Details | |
| Mass | 1.54[8] M☉ |
| Radius | 1.73±0.09[9] R☉ |
| Luminosity | 7.54+0.04 −0.06[2] L☉ |
| Surface gravity (log g) | 4.20+0.09 −0.07[10] cgs |
| Temperature | 7,502±255[8] K |
| Metallicity [Fe/H] | −0.26[11] dex |
| Rotational velocity (v sin i) | 120[12] km/s |
| Age | 146[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 | |
| SIMBAD | data |
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.[3] The object is located relatively close at a distance of 155 light-years[2] and it is drifting closer with a somewhat constrained heliocentric radial velocity of approximately −6.0 km/s.[7] 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.[1] Its observed kinematics suggest that it is a member of the Pleiades supercluster.[15]
HD 29678 has a stellar classification of A9/F0 IV,[4] 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,[5] 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[2] 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.[2] 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]
