Tau1 Arietis

Système stellaire triple (en) (?)^[1]
Binaire à éclipses^[2]
Étoile double^[2]
Source de proche infrarouge (d)^[2]
Source astrophysique de rayons UV (d)^[2]

Localisation
Ascension droite	50,31 °
Déclinaison	21,15 °
Époque	J2000.0^[3]^,^[2]
Constellation	Bélier

Spectrographie
Type spectral	B5IV
Magnitude apparente	5,36 (bande V (d))^[4]
Variabilité	Étoile variable de type Beta Lyrae

Astrométrie
Vitesse radiale	14,7 km/s^[5]
Parallaxe	6,18 mas^[6]
Distance au Soleil	527,88 al^[6]
Magnitude absolue	−0,66

Caractéristiques physiques
Luminosité	234 L☉
Vitesse de rotation	30 km/s^[7]

Composantes
Étoile	TYC 1245-1184-2 (d)

Identifiants
2MASS	2MASS J03211361+2108494
Henry Draper	HD 20756
SAO	SAO 75886
Hipparcos	HIP 15627
Bright Star Catalogue	HR 1005
Bonner Durchmusterung	BD+20 543
Tycho	TYC 1245-1184-1
GCVS	tau01 Ari
Bayer	τ¹ Ari
Flamsteed	61 Ari
Gaia DR3	Gaia DR3 61292039470080384
Gaia DR2	Gaia DR2 61292039470080384
WDS	WDS J03212+2109A
Simbad	* tau01 Ari

Tau¹ Arietis est une étoile de la constellation du Bélier. C'est un système triple à éclipses de magnitudes apparentes 5,27, 5,26 et 5,32^{[réf. nécessaire]}.

Nomenclature et histoire

La constellation (星官 *xīng guān*) de 天阴 *Tiān yīn* sur la Carte de Dunhuang (ca. 649-684). Comme celles du 石星经 *Shí shì xīng jīn*, « le Canon astral de Maître Shí », elles y sont indiquées en blanc.

Cette étoile est τ² Ari dans la Désignation de Bayer et 61 Ari dans celle de Flamsteed.

天阴五 Tiān yīn wŭ est, dans l’astronomie chinoise, le nom de la 5^e étoile (星xīng) de la constellation (星官 xīng guān) de 天阴 Tiān yīn, « le Yin céleste », et correspond au groupe à peu près au εζτδ/63 Ari dans 巫咸氏 Wu Xian shì, « le Canon Wū xián (av. Le III^e s. de notre ère) et indiquées en blanc en blanc sur la Carte de Dunhuang (ca. 649-684)^[8].

Références

↑ (en) P. P. Eggleton et A. A. Tokovinin, « A Catalog of Multiplicity among Bright Stellar Systems », Monthly Notices of the Royal Astronomical Society, OUP, vol. 389, n^o 2,‎ septembre 2008, p. 869–879 (ISSN 0035-8711 et 1365-2966, OCLC 10340650, DOI 10.1111/J.1365-2966.2008.13596.X, arXiv 0806.2878).
↑ ^{a b c d et e} SIMBAD Astronomical Database (catalogue).
↑ (en) Floor van Leeuwen, « Validation of the new Hipparcos reduction », Astronomy and Astrophysics, EDP Sciences, vol. 474, n^o 2,‎ 2007, p. 653–664 (ISSN 0004-6361, 0365-0138, 1432-0746 et 1286-4846, OCLC 1518497, DOI 10.1051/0004-6361:20078357, arXiv 0708.1752).
↑ Høg, E., Fabricius, C., Makarov, V. V., Urban, S., Corbin, T., Wycoff, G., Bastian, U., Schwekendiek, P., Wicenec, A., The Tycho-2 catalogue of the 2.5 million brightest stars (catalogue d'étoiles), EDP Sciences, Mars 2000.
↑ (en) G. A. Gontcharov, « Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system », Astronomy Letters, Nauka et Springer Science+Business Media, vol. 32, n^o 11,‎ novembre 2006, p. 759–771 (ISSN 1063-7737, 1562-6873, 0320-0108 et 0360-0327, OCLC 43712597, DOI 10.1134/S1063773706110065, arXiv 1606.08053).
↑ ^{a et b} Data Processing and Analysis Consortium, Agence spatiale européenne, Gaia Early Data Release 3 (catalogue d'étoiles), 3 décembre 2020.
↑ (en) Abt, Helmut A., Levato, Hugo et Grosso, Monica, « Rotational Velocities of B Stars », The Astrophysical Journal, IOP Publishing, vol. 573, n^o 1,‎ juillet 2002, p. 359–365 (ISSN 0004-637X et 1538-4357, DOI 10.1086/340590, lire en ligne).
↑ (en) Sun Xiachun Sun & Jacob Kistemarker, The Chinese Sky During the Han, Leiden / Köln : Brill, 1997, pp. 138 et 191.

Liens externes

Ressource relative à l'astronomie :
- Simbad

v · m Étoiles de la constellation du Bélier
Bayer	α (Hamal) β (Sheratan) γ (Mesarthim) δ (Botein) ε ζ η θ ι κ λ μ ν ξ ο π ρ¹ ρ² ρ³ σ τ¹ τ²
Flamsteed	1 4 7 10 11 14 15 16 19 20 21 23 26 27 29 30 31 33 35 36 38 39 (Lilii Borea) 40 41 (Bharani) 47 49 50 (en) 51 52 53 54 55 56 59 60 62 64 65 66 54 Cet 85 Cet
Variables	R X RV RW RX SS TT TZ UX (en) VW VY VZ (16 Tri) WX XY
HR	577 601 644 676 723 728 803 902 931 948 952 971 999
HD	12661 14787 17674 19445 20367
Autres	BD+20 307 Étoile de Teegarden HAT-P-25 HIP 14810 L1448 IRS3 LkHα 264 NGC 1059 NGC 1240 PSR B0301+19 WASP-11 WD 0145+234 (en)
Liste d'étoiles du Bélier

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