HD 16004
HD 16004 is blue-white hued star in the northern constellation of Andromeda. It is a challenge to see with the naked eye even under good viewing conditions, having an apparent visual magnitude of 6.26. Located approximately 660 light-years (202 parsecs) away from the Sun based on parallax, it is drifting closer with a heliocentric radial velocity of −7 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 02h 35m 27.90126s |
| Declination | +39° 39′ 51.7705″ |
| Apparent magnitude (V) | 6.26 |
| Characteristics | |
| Spectral type | B9.5 III HgMn |
| U−B color index | −0.33 |
| B−V color index | −0.30 |
| Astrometry | |
| Radial velocity (Rv) | −6.8±1.1 km/s |
| Proper motion (μ) | RA: +16.659 mas/yr Dec.: −34.296 mas/yr |
| Parallax (π) | 4.9384 ± 0.1650 mas |
| Distance | 660 ± 20 ly (202 ± 7 pc) |
| Absolute magnitude (MV) | −0.36 |
| Details | |
| Mass | 2.88 M☉ |
| Radius | 3.274 R☉ |
| Luminosity | 158 L☉ |
| Surface gravity (log g) | 3.8 cgs |
| Temperature | 10,809 K |
| Metallicity [Fe/H] | −0.17 dex |
| Rotational velocity (v sin i) | 30 km/s |
| Age | 162 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a chemically peculiar mercury-manganese star with a stellar classification of B9.5 III HgMn. It is an estimated 162 million years old and is spinning with a projected rotational velocity of 30 km/s. The star is radiating 158 times the luminosity of the Sun from its photosphere at an effective temperature of 10,809 K.
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