Let us know, ©2020 The University of Texas McDonald Observatory. And even then, they can change their minds as new observations become available. Please consider making a tax-deductible contribution to StarDate. Weitere Bedeutungen sind unter. You can support StarDate radio by sponsoring our program for a day. The planet was discovered by measuring its gravitational pull on the star. You'll get your name on the air (or the name of someone else you would like to honor), in StarDate magazine, and on our web site. April 12, 2017 • Radius: 44.2 sol The star was likewise worshiped by the Babylonians, who called the constellation Gud.Anna (“Bull of Heaven“), while to the ancient Egyptians it represented the bull-god Orissi. But in 2018, a team of astronomers reported a new number: 1.16 times the mass of the Sun. h�b```�f�3B ���KX��.�9�9��!F������Q�{������]oY�� Aldebaran / æ l ˈ d ɛ b ər ə n /, designated α Tauri (Latinized to Alpha Tauri, abbreviated Alpha Tau, α Tau), is a red giant star about 65 light-years from the Sun in the zodiac constellation Taurus.It is the brightest star in Taurus and generally the fourteenth-brightest star in the night sky, though it varies slowly in brightness between magnitude 0.75 and 0.95 H��3012p Y�H�ƨ� � Instead, astronomers try to determine its mass by measuring its temperature, its composition, how fast it spins, and more. Für weitere Größenvergleiche Bild anklicken. Er ist Teil des Wintersechsecks und liegt von der Erde aus in Richtung des offenen Sternhaufens Hyaden, gehört allerdings nicht zu diesem. Die scheinbare Helligkeit beträgt 0,87 mag, die absolute Helligkeit −0,71 mag. The stars’ photosphere displays carbon, oxygen, and nitrogen abundances, which suggests the first dredge-up stage in the life cycle of Aldebaran, a normal step in the evolutionary process of red giant stars that involves “dredging” up material from the star’s deep interior by means of convection currents, which then gets mixed into the star’s outer layers. Stars Effektive Temperatur (3850 ± 140) K: Metallizität [Fe/H] (−0,15 ± 0,20) Rotationsdauer: 643 d: Andere Bezeichnungen und Katalogeinträge What is Aldebaran’s temperature? Will M. Farr, Benjamin J. S. Pope, Guy R. Davies, Thomas S. H. North, Timothy R. White, Jim W. Barrett, Andrea Miglio, Mikkel N. Lund, Victoria Antoci, Mads Fredslund Andersen, Frank Grundahl, Daniel Huber: S. Dehaes, E. Bauwens, L. Decin, K. Eriksson, G. Raskin, B. Butler, C. D. Dowell, B. Ali, J. Aldebaran (α Tau) is a red giant star belonging to the constellation Taurus (The Bull). Aldebaran ist ein Doppelsternsystem in etwa 67 Lichtjahren (20 Parsec) Entfernung. … Die schwache gelbe Kugel mit Mittelpunkt auf der Sonne zeigt einen Radius von einer Lichtminute. Aldebarans’ K5 III classification denotes it as an orange-red giant that has evolved off the main sequence, having consumed its hydrogen fuel. That applies even to some of the most intensely studied stars of all. You can’t just put it on a scale. In terms of infrared (IR) radiation in the J-band, Aldebaran shines at magnitude -2.1, making it the fifth brightest star in this frequency, with only Betelgeuse (-2.9), Antares (-2.7), R Doradus (-2.6), and Arcturus (-2.2) being more luminous. One way of finding Aldebaran in the northern hemisphere is to follow the line formed by the three stars in Orion’s Belt from left to right to the first bright red star that you come across. 0 Stretching out from the star to a distance of between 1.2 and 2.8 times the radius of the star, is a MOLsphere (molecular outer atmosphere) in which temperatures are low enough (1,000K – 2,000K) for various gaseous molecules to form. Even novice observers should not find it difficult to spot Aldebaran in the Taurus constellation, the star being located, by pure chance, exactly in the line of sight between Earth and the Hyades open cluster. • Distance: 65.3 light years • Luminosity: 425 sol 6 Pollux (β Gem) is a giant star belonging to the constellation Gemini (The Twins). Peter Christoforou Nonetheless, the stars’ solar wind continues outward up to the termination shock boundary, which is where it collides with the (hot) ionized interstellar medium that predominates in the Local Bubble, a roughly spherical astrosphere that stretches outward from Aldebaran to a distance of about 1,000 AU. If the newer mass is correct, it’s good news for life in the system. C�RGCG�FGG�F�&�q�{�iv [�� ���P�`� ��8�I����T����WA���m���*E؅*�4#�'܁��7 ��2 ļ'� One example is Aldebaran, which marks the eye of Taurus, the bull. Aldebaran can be occulted by the Moon, though, but this phenomena cannot be observed from the southern hemisphere. Aldebaran's surface temperature of 4010 degrees Kelvin (compared to the Sun's 5780 degree temperature) gives it a distinct orangy color not all that dissimilar to that of Mars, which commonly passes it. Keep up with everything in the sky with a subscription to our daily radio program, hosted by Sandy Wood. Enjoy StarDate magazine on your iPad, Kindle or Nook with our digital edition. It is a K5 star that is classified as a type LB slow irregular variable. Taurus is a northern hemisphere constellation that can be seen by observers located between +90° and -65° of latitude, with the best time to view Aldebaran, the constellation’s brightest star, being autumn/winter in the northern hemisphere, and spring/summer from southern locations. Although Aldebaran is too far south of the ecliptic to be occulted by the planets, due to precession, in the distant past both Mercury and Venus had occulted the star, with the next occultation of Aldebaran by a planet, in this case Venus, set to happen on August 27th of 5366 AD.