הסעות בריגל

ריגל הוא כוכב ענק כחול בקבוצת הכוכבים אוריון. יש לו את הכינוי באייר β אוריוניס, אשר לטינית ל בטא אוריוניס ומקוצר בטא אורי אוֹ β אורי. Rigel is the brightest and most enormous component – and the eponym – of a star system of at least four stars that appear as a single blue-white lessening of buoyant to the naked eye. This system is located at a push away of nearly 860 light-years (260 pc) from the Sun.

A star of spectral type B8Ia, Rigel is calculated to be anywhere from 61,500 to 363,000 mature as colorful as the Sun, and 18 to 24 epoch as massive, depending upon the method and assumptions used. Its radius is on height of seventy time that of the Sun, and its surface temperature is 12,100 K. Due to its stellar wind, Rigel’s mass-loss is estimated to be ten million period that of the Sun. With an estimated age of seven to nine million years, Rigel has exhausted its core hydrogen fuel, expanded, and cooled to become a supergiant. It is customary to stop its activity as a type II supernova, leaving a neutron star or a black hole as a conclusive remnant, depending on the initial layer of the star.

Rigel varies slightly in brightness, its apparent magnitude ranging from 0.05 to 0.18. It is classified as an Alpha Cygni variable due to the amplitude and periodicity of its brightness variation, as competently as its spectral type. Its intrinsic variability is caused by pulsations in its unstable atmosphere. Rigel is generally the seventh-brightest star in the night way of being and the brightest star in Orion, though it is occasionally outshone by Betelgeuse, which varies higher than a larger range.

מערכת משולשת כוכבים מנוכרת מריגל בזווית של 9.5 שניות קשת. It has an apparent magnitude of 6.7, making it 1/400th as bright as Rigel. Two stars in the system can be seen by large telescopes, and the brighter of the two is a spectroscopic binary. These three stars are all blue-white main-sequence stars, each three to four era as earsplitting as the Sun. Rigel and the triple system orbit a common middle of gravity when a get older estimated to be 24,000 years. The inner stars of the triple system orbit each other all 10 days, and the outer star orbits the inner pair every 63 years. A much fainter star, separated from Rigel and the others by nearly an arc minute, may be portion of the thesame star system.