Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation
Taurus
Right ascension
05h 37m 38.68542s[1]
Declination
+21° 08′ 33.1588″[1]
Apparent magnitude (V)
3.010[2](2.88–3.17[3])
Characteristics
Spectral type
B2 IIIpe[4]
U−B color index
−0.749[2]
B−V color index
−0.164[2]
Variable type
γ Cas[3]
Astrometry
Radial velocity (Rv)
+20[5] km/s
Proper motion (μ)
RA: +1.78[1] mas/yr Dec.: −20.07[1] mas/yr
Parallax (π)
7.33 ± 0.82 mas[1]
Distance
approx. 440 ly (approx. 140 pc)
Absolute magnitude (MV)
−2.67[6]
Orbit[4]
Period (P)
132.987 d
Semi-major axis (a)
1.17 AU
Eccentricity (e)
0.0 (assumed)
Inclination (i)
92.8°
Longitude of the node (Ω)
−58.0°
Periastron epoch (T)
2,447,025.6 HJD
Argument of periastron (ω) (secondary)
0.0 (assumed)°
Semi-amplitude (K1) (primary)
7.43 km/s
Details
ζ Tau A
Mass
11.2[4]M☉
Radius
5.5[4]R☉
Luminosity
4,169[7]L☉
Temperature
15,500[7] K
Rotational velocity (v sin i)
125[8] km/s
Age
22.5 ± 2.6[9] Myr
ζ Tau B
Mass
0.94[4]M☉
Other designations
Tianguan, 123 Tauri, HR 1910, HD 37202, BD+21°908, FK5 211, HIP 26451, SAO 77336, GC 6985[10]
Database references
SIMBAD
data
Zeta Tauri (ζ Tauri, abbreviated Zeta Tau, ζ Tau) is a binary star in the zodiac constellation of Taurus, the Bull. It has an apparent visual magnitude of about 3.0, which is bright enough to be seen with the naked eye. Parallax measurements place it at a distance of roughly 440 light-years from the Sun.
The two components are designated Zeta Tauri A (officially named Tianguan/tiænˈɡwɑːn/) and Zeta Tauri B.
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ZetaTauri (ζ Tauri, abbreviated Zeta Tau, ζ Tau) is a binary star in the zodiac constellation of Taurus, the Bull. It has an apparent visual magnitude...
known as the Crab Nebula. It is located in the sky near the star ZetaTauri (ζ Tauri). The core of the exploding star formed a pulsar, called the Crab...
has returned to the point of its discovery northeast of the binary star ZetaTauri twice—in March 1865 and March 1949—and will return to this location again...
Theta2 Tauri Binary star system 3.41 3.37 Lambda Tauri Triple star system 3.41 3.39 Gamma Phoenicis Binary star system 3.41 Zeta Pegasi Star 3.41 Zeta Lupi...
; Armstrong, J. T. (1994). "Maximum-entropy maps of the Be shell star zetaTauri from optical long-baseline interferometry". Astronomy and Astrophysics...
observed by the Chinese, Arabs and possibly Native Americans, near the star ZetaTauri. For 23 days it remains bright enough to be seen in daylight. Its remnants...
(the Bull), positioned about a half degree to the SSW of the bright star ZetaTauri. The apparent visual magnitude of this star is 7.68, which is too dim...
long-term spectroscopic monitoring of stars such as Rigel, Beta Lyrae, and ZetaTauri. Brooks Observatory List of astronomical observatories "Ritter Observatory...
Minor, which lay between Orion and Taurus. The two telescopes lay near ZetaTauri, near where the planet Uranus was first spotted. Johann Elert Bode renamed...
Chinese Song dynasty, Arab, and possibly Amerindian observers near the star ZetaTauri. For several months it remains bright enough to be seen during the day...
Pacific 49(August 1937): 226. "The Line λ 5015 of He I in the Spectrum of ZetaTauri" Publications of the Astronomical Society of the Pacific 52(April 1940):...
June two other more active daytime meteor showers are known. They are the Zeta Perseids which are also related to Taurid complex and the Arietids which...
A single-star asterism in the Net mansion 天關 Tiān Guān Celestial Gate ZetaTauri Tianguan A single-star asterism in the Net mansion. Tiān Guān became the...
observed by the Chinese, Arabs and possibly Native Americans, near the star ZetaTauri. For 23 days it remains bright enough to be seen in daylight. Its remnants...
(February 1994). "Short-term photometric variability of Psi Persei and ZetaTauri". Publications of the Astronomical Society of the Pacific. 106 (696):...
Church in modern Montenegro. Founded in 1219 by Saint Sava as the Eparchy of Zeta, it has continued to exist, without interruption, up to the present time...
Bihać Oblast of Bitola Oblast of Čačak (Raška Oblast) Oblast of Cetinje (Zeta Oblast) Oblast of Ćuprija Oblast of Dubrovnik Oblast of Karlovac (Primorsko-Krajina...
Observatory Director William J. Hussey, was titled “A Study of the Spectrum of ZetaTauri”. In 1924, when asked in an Alumnae Council Survey, “Who are the ten most...
Montenegro and the Littoral, and their predecessors (bishops and metropolitans of Zeta, and Cetinje), from 1219 to the present day. Ilarion I (1220–1242) German...
half; Travunia, the west; and Rascia proper, the north. The Principality of Zeta emerged in the 14th and 15th centuries. From the late 14th century to the...
the constellation Taurus (the Bull) is designated α Tauri (abbreviated α Tau, pronounced Alpha Tauri), which means "Alpha of the Bull". Bayer used Greek...
part of the Zeta governed by Stefan II Crnojević. In 1499 Firuz Bey formally annexed Zeta to the territory of his Sanjak of Scutari, and Zeta lost its status...
of infant T Tauri stars that are still in the process of entering the main sequence. These sparse populations of up to a thousand T Tauri stars are known...
Lower Zeta (lands previously held by Lord Žarko), went after Head of Upper Zeta Đuraš Ilijić in 1362, and killed him, expanding further the Zeta župa....
Zeta Crucis, Latinized from ζ Crucis, is a binary star system in the southern constellation of Crux. It is visible to the naked eye with an apparent magnitude...
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