HD 16004

HD 16004
Opazovalni podatki; Epoha J2000 Enakonočje J2000
Ozvezdje	Andromeda
Rektascenzija	02h 35m 27,90126s
Deklinacija	+39° 39′ 51,7705″
Navidezni sij (V)	6,26
Značilnosti
Spektralni razred	B9.5 III HgMn
U−B Barvni indeks	−0,33
B−V Barvni indeks	−0,30
Astrometrija
Radialna hitrost (Rv)	−6,8±1,1 km/s
Lastno gibanje (μ)	RA: +16,659 mas/l ; Dec.: −34,296 mas/l
Paralaksa (π)	4,9384 ± 0,1650 mas
Oddaljenost	660 ± 20 sv. l. ; (202 ± 7 pc)
Absolutni izsev (MV)	−0,36
Podrobnosti
Površinska težnost (log g)	4,15 cgs
Temperatura	12,150 K
Tirna hitrost(v sin i)	30 km/s
Starost	75,3 Ma
Druge oznake
	BD+39° 573, HD 16004, HIP 12057, HR 746, SAO 55680
Sklici na podatkovne baze
SIMBAD	podatki

HD 16004 je zvezda v severnem ozvezdju Andromeda. Zvezda je pravi izziv za opazovanje s prostim očesom tudi pod izvrstnimi pogoji, saj ima navidezno magnitudo enako 6,26.^[2] Nahaja se približno 202 pc (660 ly) stran od nas, a bliža se nam s stalno heliocentrično radialno hitrostjo -6,8 km/s.^[3] To je kemijsko nepravilna Hg-Mn zvezda^[8] z zvezdno klasifikacijo B9.5 III HgMn.^[2]

Viri

↑ ^1,0 ^1,1 ^1,2 ^1,3 ^1,4 Brown, A. G. A.; in sod. (Gaia collaboration) (Avgust 2018). »Gaia Data Release 2: Summary of the contents and survey properties«. Astronomy & Astrophysics. Zv. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
↑ ^2,0 ^2,1 ^2,2 ^2,3 ^2,4 ^2,5 Jaschek, M.; Jaschek, C.; Grenier, S.; Gomez, A. E.; Heck, A. (1980). »The absolute magnitude of the Hg-Mn stars«. Astronomy and Astrophysics. 81: 142. Bibcode:1980A&A....81..142J.
↑ ^3,0 ^3,1 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.
↑ ^4,0 ^4,1 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.
↑ Takada, M. (1979). »Surface gravity of Mn-Hg stars«. Publications of the Astronomical Society of Japan. 31: 473. Bibcode:1979PASJ...31..473T.
↑ Glagolevskij, Yu. V. (1994). »A new list of effective temperatures of chemically peculiar stars. II«. Bulletin of the Special Astrophysical Observatory. 38: 152. Bibcode:1994BSAO...38..152G.
↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). »Rotational Velocities of B Stars«. The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
↑ 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] 1,0 ^1,1 ^1,2 ^1,3 ^1,4 Brown, A. G. A.; in sod. (Gaia collaboration) (Avgust 2018). »Gaia Data Release 2: Summary of the contents and survey properties«. Astronomy & Astrophysics. Zv. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.

[jaschek-2] 2,0 ^2,1 ^2,2 ^2,3 ^2,4 ^2,5 Jaschek, M.; Jaschek, C.; Grenier, S.; Gomez, A. E.; Heck, A. (1980). »The absolute magnitude of the Hg-Mn stars«. Astronomy and Astrophysics. 81: 142. Bibcode:1980A&A....81..142J.

[Gontcharov-3] 3,0 ^3,1 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.

[Westin-4] 4,0 ^4,1 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.

[takada-5] Takada, M. (1979). »Surface gravity of Mn-Hg stars«. Publications of the Astronomical Society of Japan. 31: 473. Bibcode:1979PASJ...31..473T.

[6] Glagolevskij, Yu. V. (1994). »A new list of effective temperatures of chemically peculiar stars. II«. Bulletin of the Special Astrophysical Observatory. 38: 152. Bibcode:1994BSAO...38..152G.

[7] Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). »Rotational Velocities of B Stars«. The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.

[Renson2009-8] 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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Opazovalni podatki Epoha J2000 Enakonočje J2000
Ozvezdje	Andromeda
Rektascenzija	02^h 35^m 27,90126^s^[1]
Deklinacija	+39° 39′ 51,7705″^[1]
Navidezni sij (V)	6,26^[2]
Značilnosti
Spektralni razred	B9.5 III HgMn^[2]
U−B Barvni indeks	−0,33^[2]
B−V Barvni indeks	−0,30^[2]
Astrometrija

Radialna hitrost (R_v)	2999320000000000000♠−6,8±1,1^[3] km/s
Lastno gibanje (μ)	RA: +16,659^[1] mas/l Dec.: −34,296^[1] mas/l
Paralaksa (π)	4,9384 ± 0,1650^[1] mas
Oddaljenost	660 ± 20 sv. l. (202 ± 7 pc)
Absolutni izsev (M_V)	−0,36^[4]

Podrobnosti

Površinska težnost (log g)	4,15^[5] cgs
Temperatura	12,150^[6] K
Tirna hitrost(v sin i)	30^[7] km/s
Starost	75,3^[4] Ma

Druge oznake
BD+39° 573, HD 16004, HIP 12057, HR 746, SAO 55680
Sklici na podatkovne baze
SIMBAD	podatki