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Tianguan — Estrella en Tauro

HIP 26451; Zeta Tauri; 123 Tauri

Magnitud 2.9–3.0m Star Tauro (Tau) Visible
Mapa Estelar
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Acerca de Tianguan

Descripción

Zeta Tauri is a blue star of tipo espectral B4IIIpe at magnitude 3.0 en Tauro. Located a aproximadamente 440 años luz de la Tierra, it marks the tip of the Bull's southern horn. The 'pe' in its spectral classification indicates it is a shell star — a rapidly rotating star surrounded by a disk of expelled gas. It is also a binaria espectroscópica.

Consejos de Observación

Zeta Tau marks the southern horn tip of Taurus, forming a pair with Beta Tau (Elnath) at the northern horn tip. It is easy to find by following the line of Orion's Belt to the upper left (northwest). The Nebulosa del Cangrejo (M1) lies about 1 degree to the northwest of Zeta Tau, making this star the primary guide for finding one of the most famous deep-sky objects. Mejor observación from November through March.

Historia

Zeta Tauri has no widely used traditional proper name, though it has occasionally been called Tianguan in Chinese astronomy, meaning 'celestial gate.' Its proximity to the Nebulosa del Cangrejo (M1) is historically significant — the 1054 supernova that created the Nebulosa del Cangrejo was recorded very close to this star's position.

Datos Curiosos

Zeta Tau is the most important guide star for finding the Nebulosa del Cangrejo (M1). When Chinese astronomers recorded the 'guest star' of 1054, they described its position relative to Zeta Tau. As a shell star, Zeta Tau's equatorial disk causes its spectrum to show emission lines that vary over time as the disk changes.

Observar

1Propiedades Físicas

Magnitud 3.00
Rango 2.8 - 3.17
Período 133 días
Tipo variable E/GS+GCAS
Tipo Espectral B1IVe shell supergigante
Color de la Estrella Azul (B-V -0.19)
Distancia 438 ly

2Posición e Identificadores

RA 05h 37m 38.7s
Dec +21° 08' 33.0"
Constelación Tauro (Tau)
HR 1910
HIP 26451
HD 37202
SAO 77336
Bayer Zeta
Flamsteed 123 Tau
Variable ID Zet Tau

3Dificultad de observación

Iniciar sesión y configura tu equipo y ubicación predeterminada para ver una fila personalizada.
Equipo Bortle 3 Bortle 4 Bortle 5
Simple vista Fácil Fácil Fácil
Buscador 50mm Fácil Fácil Fácil
150mm telesc. Fácil Fácil Fácil
Fácil Medio Difícil Muy difícil Imposible

Bortle 3 = rural · 4 = suburbano · 5 = urbano

4Visibilidad

Establece una ubicación en Ajustes de Usuario para ver datos de visibilidad.

Mejor temporada Nov – Jan (peak: Dec)

5Imagen de Rastreo

Cargando imagen de rastreo…

Explorar

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Comparación de tamaño

Consultando VizieR para datos estelares…
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Comparar estrellas

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Clasificación espectral

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Diagrama de Hertzsprung-Russell

Cargando diagrama HR…
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Ciclo de vida estelar

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Espectro de cuerpo negro

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Espectro de absorción estelar

Espectro de absorción simulado basado en el tipo espectral. Pase el ratón sobre las líneas para identificar los elementos.

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Fusión Estelar

Descubrir

15Notas Estelares

Gamma Cas 2.90 - 3.03V. Var. shell Sp. Widths H-lines vary in about 10 min. Polarization at H beta changes in tens | of minutes, probably due to circumstellar matter.
132.91d, K 8.9k/s, V0 +21.8k/s, asini = 16.1. 3.2, 5.2v, sep. 0.007". Common circumstellar envelope. The 132.9d | period is superimposed on a 7y pseudo-period related to oscillation of envelope.
Color excess E(B-V) = +0.09.
Cas-Tau OB1.
Lyman beta observed from COPERNICUS. Spectra obtained from AEROBEE rocket show absorption features at 1920 (FeIII) | and 1720A (AlII) associated with extended atmosphere or circumstellar shell. Also classified B2IVp.
Rapidly rotating star. Rotational velocity varies with wavelength: vsini about 300k/s in visual, 150 or less in UV. | Expanding circumstellar shell. Shell-line velocities do not correspond to orbital elements; possibly gaseous ring. | Unstable shell star with pseudo-periodic phenomena.
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Máquina del tiempo de la luz

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Viaje Relativista

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