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Cookies / About Us / Contact Us / Twitter / Facebook, Tau Scorpii, Tau Sco, HD 149438, HIP 81266, HR 6165, TYC 6807-1012-1, 23 Scorpii, 23 Sco, CD-27 11015, Paikauhale is a main star in the constellation. An Astronomical Unit is the distance between Earth and the Sun. Thank you! The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). If you find this website useful please consider a small donation that will help covering hosting costs. [10], The spectrum of this star shows triply ionized oxygen (O IV) that is being generated by X-rays and the Auger ionization effect. This system has a combined apparent visual magnitude of +2.88, making it one of the brighter members of the constellation.

Sigma Scorpii (or σ Scorpii, abbreviated Sigma Sco or σ Sco), is a multiple star system in the constellation of Scorpius, located near the red supergiant Antares, which outshines it. Distance, of course.

is a hypergiant star Longitude: 0° 00’ 00” E Paikauhale estimated radius has been calculated as being 3.89 times bigger than the Sun. situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. the Hertzsprung–Russell diagram. Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 7.59000 which gave the calculated distance to Paikauhale as 429.73 light years away from Earth or 131.75 parsecs. But here is the reverse, a rare case in which one name applies to two stars!

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. Over the energy range 0.8–1.2 keV, its X-ray luminosity is Lx = 1.8 × 1031 erg s−1 with a large Lx to Lbol of log Lx/Lbol = –6.53 from ASCA measurements. In 2016, the IAU organized a Working Group on Star Names (WGSN)[19] to catalog and standardize proper names for stars. Information regarding Metallicity and/or Mass is from the E.U. [1], Compared to the Sun, Tau Scorpii is a massive OB star with 15[6] times the Sun's mass and more than six times the radius of the Sun. As such, the fossil-field theory was more likely. Paikauhale visual magnitude is 2.82. This star is now referred to as Paikauhale and over time will no longer be associated with the name Al Niyat. As yet there is no evidence of a companion in orbit around τ Sco. The items in red are values that I've calculated so they could well be wrong. The figure is derived at by using the formula from SDSS rather than peer reviewed papers.

2 kilometers per second. Tau Scorpii (τ Sco, τ Scorpii), formally known as Paikauhale /ˌpaɪkaʊˈhɑːleɪ/, is a star in the southern zodiac constellation of Scorpius. It is a magnetic star whose surface magnetic field was mapped by means of Zeeman–Doppler imaging. Mach 1 is the speed of sound, Mach 2 is twice the speed of sound. The name Alniyat (Al Niyat) is shared by two stars, this one and Sigma Scorpii.

These are magnetic monsters, with a magnetic field that can be up to a quadrillion times the Earth's magnetic strength! Observations with the ROSAT space telescope showed it has a higher energy (harder) X-ray spectrum than is usual for B0 V stars. The Upper Scorpius subgroup contains thousands of young stars with mean age 11 million years at average distance of 470 light years (145 parsecs)[7] A more recent analysis[7] of the HR diagram position for Tau Scorpii estimates its effective temperature to be 29,850 K with a luminosity of 20,400 L☉, consistent with an isochronal age of 5 million years and an estimated mass of 14.5–14.7 solar masses. It is radiating about 20,400 times the Sun's luminosity from its outer envelope at an effective temperature of 31,440 K. This gives it the blue-white hue characteristic of B-type stars.

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