HD 16004

HD 16004
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
	BD+39°573, GC 3093, HD 16004, HIP 12057, HR 746, SAO 55680, WDS J02355+3940A
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.

References

^ ^a ^b ^c ^d ^e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d ^e ^f Jaschek, M.; et al. (1980). "The absolute magnitude of the Hg-Mn stars". Astronomy and Astrophysics. 81: 142. Bibcode:1980A&A....81..142J.
^ ^a ^b Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
^ Westin, T. N. G. (1985). "The local system of early type stars - Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99–134. Bibcode:1985A&AS...60...99W.
^ ^a ^b ^c ^d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
^ ^a ^b McDonald, I.; et al. (2017). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. S2CID 73594365.
^ ^a ^b Abt, Helmut A.; et al. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778.
^ "HD 16004". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-07-07.
^ Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, HgMn and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788.

[GaiaDR2-1] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[jaschek-2] ^ ^a ^b ^c ^d ^e ^f Jaschek, M.; et al. (1980). "The absolute magnitude of the Hg-Mn stars". Astronomy and Astrophysics. 81: 142. Bibcode:1980A&A....81..142J.

[Gontcharov-3] Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.

[Westin-4] Westin, T. N. G. (1985). "The local system of early type stars - Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99–134. Bibcode:1985A&AS...60...99W.

[starhorse-5] Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.

[McDonald2017-6] McDonald, I.; et al. (2017). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. S2CID 73594365.

[Abt2002-7] Abt, Helmut A.; et al. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.

[gontcharov2012-8] Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778.

[SIMBAD-9] "HD 16004". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-07-07.

[Renson2009-10] Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, HgMn and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788.

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Observation data Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	02^h 35^m 27.90126^s^[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 (R_v)	−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 (M_V)	−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
BD+39°573, GC 3093, HD 16004, HIP 12057, HR 746, SAO 55680, WDS J02355+3940A^[9]
Database references
SIMBAD	data