Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 02h 35m 27.90126s[1] |
Declination | +39° 39′ 51.7705″[1] |
Apparent magnitude (V) | 6.26[2] |
Characteristics | |
Spectral type | B9.5 III HgMn[2] |
U−B color index | −0.33[2] |
B−V color index | −0.30[2] |
Astrometry | |
Radial velocity (Rv) | −6.8±1.1[3] km/s |
Proper motion (μ) | RA: +16.659[1] mas/yr Dec.: −34.296[1] mas/yr |
Parallax (π) | 4.9384 ± 0.1650 mas[1] |
Distance | 660 ± 20 ly (202 ± 7 pc) |
Absolute magnitude (MV) | −0.36[4] |
Details | |
Mass | 2.88[5] M☉ |
Radius | 3.274[6] R☉ |
Luminosity | 158[6] L☉ |
Surface gravity (log g) | 3.8[5] cgs |
Temperature | 10,809[5] K |
Metallicity [Fe/H] | −0.17[5] dex |
Rotational velocity (v sin i) | 30[7] km/s |
Age | 162[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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.[2] 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.[3]
This is a chemically peculiar mercury-manganese star[10] with a stellar classification of B9.5 III HgMn.[2] It is an estimated 162 million years old and is spinning with a projected rotational velocity of 30 km/s.[7] 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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