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HD 16004

HD 16004
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]
Distance660 ± 20 ly
(202 ± 7 pc)
Absolute magnitude (MV)−0.36[4]
Details
Mass2.88[5] M☉
Radius3.274[6] R☉
Luminosity158[6] L☉
Surface gravity (log g)3.8[5] cgs
Temperature10,809[5] K
Metallicity [Fe/H]−0.17[5] dex
Rotational velocity (v sin i)30[7] km/s
Age162[8] Myr
Other designations
BD+39°573, GC 3093, HD 16004, HIP 12057, HR 746, SAO 55680, WDS J02355+3940A[9]
Database references
SIMBADdata

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.

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference jaschek was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gontcharov was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Westin was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference starhorse was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference gontcharov2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).

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