The source of the information if it has a Hip I.D.  Consequently, the Chinese name for γ Tauri itself is 畢宿四 (Bì Xiù sì), "the Fourth Star of Net". It should not be taken as though the star is moving closer or further away from us. The primary member, λ Tau A, undergoes a decrease of 0.435 ± 0.050 in magnitude during an eclipse, while the secondary component, λ Tau B, decreases by 0.09–0.10 in magnitude. Hence the enlarged radius of the secondary must be caused by a means other than the star's age. All messages will be reviewed before being displayed. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 38.56000 km/s with an error of about 0.09 km/s . The combined brightness of the pair varies from magnitude +3.37 to +3.91 as first one star and then the other pass in front of its companion. Prima Hyadum has an apparent magnitude of 3.65 which is how bright we see the star from Earth. For Prima Hyadum, the location is 04h 19m 47.53 and +15° 37` 39.7 . Prima Hyadum Iron Abundance is 0.12 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context. The figure of 101.36 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.  The star is radiating about 85 times the luminosity of the Sun and has 2.7 times the Sun's mass. Centre de Données astronomiques de Strasbourg, "WG Triennial Report (2015-2018) - Star Names", https://en.wikipedia.org/w/index.php?title=Gamma_Tauri&oldid=973574024, Articles with Chinese-language sources (zh), Short description is different from Wikidata, Articles containing Chinese-language text, Creative Commons Attribution-ShareAlike License, This page was last edited on 18 August 2020, at 00:38. The star is moving -23.42 ± 0.20 milliarcseconds/year towards the north and 115.46 ± 0.32 milliarcseconds/year east if we saw them in the horizon.  The mean physical separation between these two stars is estimated at 21.91 times the radius of the Sun, or 0.1 Astronomical Units. It is a member of, and located within about 2.5 parsecs of the center of, the Hyades star cluster, the nearest open cluster to the Sun. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days). In stellar evolutionary terms, the more massive primary should be the first to reach the subgiant stage.  The side of the secondary facing the more massive star is being heated by an additional 1,440 K, which produces a rotational effect that causes the strength of the secondary's spectral lines to vary over the course of its orbit. Based on the spectral type, we can deduce that the surface temperature of the star is in the order of between between 5,000 and 6,000K based on the notes from Harvard University. If you need the diameter of the star, you just need to multiple the radius by 2. Gamma Tauri (γ Tauri, abbreviated Gamma Tau, γ Tau) is either a solitary, binary or double star (the Washington Double Star Catalog notes it as a "Dubious Double" or "Bogus Binary") that marks the tip of the "V" in the constellation of Taurus.  This star is the brightest member of the system, radiating about 5,801 times the luminosity of the Sun from its outer envelope at an effective temperature of 18,700 K, which gives it a blue-white hue common to the B-type stars. Alternatively, the star may have undergone a period of convective mixing, bringing the carbon-depleted material to the surface. U.G. It has about half the mass of the Sun. Using the most recent figures given by the 2007 Hipparcos data, the star is 161.55 light years away from us. NGC 1435 was discovered by the German astronomer Wilhelm Tempel. In the case of a star, its the galactic centre. , The secondary companion has a stellar classification of A4 IV, suggesting that it is a subgiant star that has nearly exhausted the supply of hydrogen at its core and is in the process of evolving into a giant star. , Gamma Tauri presents as a spectral class G8 or K0 giant star with an apparent magnitude of +3.65. The number of A.U. However, the cause of such a fully convective behavior in a main sequence star of this mass is unclear. Based on the spectral type (G8III) of the star, the star's colour is yellow . The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. , The spectrum of Lambda Tauri A shows an under abundance of carbon relative to the norm for this category of star. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever. This star has passed through the main sequence phase is now a red clump giant, meaning it is using nuclear fusion of helium at its core to provide energy. , "HD 25204 -- Eclipsing binary of Algol type", Monthly Notices of the Royal Astronomical Society, https://en.wikipedia.org/w/index.php?title=Lambda_Tauri&oldid=957716812, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 20 May 2020, at 06:10. Proper Motion details the movements of these stars and are measured in milliarcseconds. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 11.99.  Lambda Tauri A is rotating rapidly with a projected rotational velocity of 85 km s−1. More information can be found on my dedicated multiple star systems page. Using the 2007 distance, the star is roughly 10,216,224.67 Astronomical Units from the Earth/Sun give or take a few. When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. The designations of the two potential components as Gamma Tauri A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). A possible explanation for this is a loss of mass by the star some time in the past. If you used the 1997 Parallax value, you would get an absolute magnitude of 0.28 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.18. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment. Gamma Tauri, Gam Tau, Hyadum I, Gamma Tau, HD 27371, HIP 20205, HR 1346, 54 Tauri, 54 Tau, BD+15 612: Spectral Type: G8III: Constellation's Main Star: Yes: Multiple Star System: Yes: Star Type: Giant Star: Colour: Yellow: Galaxy: Milky Way: Constellation: Taurus: Absolute Magnitude: 0.28 / 0.18 : Visual / Apparent Magnitude: 3.65: Naked Eye Visible: Yes - Magnitudes: Right Ascension (R.A.) The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. It has an apparent magnitude of 13.0 and is approximately 440 light years distant from the solar system. Hipparcos was a E.S.A.  Corncorde before it was retired was the fastest commercial airline across the Atlantic and only one that could do Mach 2. An inner region of the star became depleted by the conversion of carbon into nitrogen during the nuclear fusion process, and this region was later exposed when the outer envelope of the star was lost. An Astronomical Unit is the distance between Earth and the Sun. The orbital plane of this component is nearly coplanar with the orbit of Lambda Tauri AB, differing by no more than 7°. In 2016, the IAU organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. Mach 1 is the speed of sound, Mach 2 is twice the speed of sound. Gamma Tauri presents as a spectral class G8 or K0 giant star with an apparent magnitude of +3.65. All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. Based upon parallax measurements from the Hipparcos mission, the distance to this system is approximately 480 light-years (150 parsecs).  It, along with δ Librae, were the first stars on which rotational line broadening was observed, by Frank Schlesinger in 1909. The Sun's radius is 695,800km, therefore the star's radius is an estimated 7,963,842.95.km. Cookies / About Us / Contact Us / Twitter / Facebook, Gamma Tauri, Gam Tau, Hyadum I, Gamma Tau, HD 27371, HIP 20205, HR 1346, TYC 1264-1009-1, 54 Tauri, 54 Tau, BD+15 612, Prima Hyadum is a main star in the constellation.