Subject |
has right ascension |
has declination |
has spectral type |
is part of |
has surface temperature |
is an instance of |
has V magnitude |
has color |
has been observ |
has B-V magnitude |
has distance |
has absorption line |
is usually part of |
is a kind of |
has apparent magnitude |
has synonym |
has definition |
has luminosity class |
B star | | | O, B, A, and early F | | 11000 to 28000 K | | | blue-white | | | | He I | | early star | | | Blue-white star of spectral type B whose spectra are characterized by absorption lines of neutral helium which reach their maximum intensity at B2. The Balmer lines of hydrogen are strong, and lines of singly ionized oxygen and other gases are also present. | |
blue supergiant | | | | | greater than 1000 Kelvin | | | | | | | | | supergiant | | | A supergiant star with spectral type O or B. All blue supergiants are hot and young. Rigel, in the constellation Orion, is the best example. | I |
naked eye star | | | | Milky Way | greater than 1000 Kelvin | | | | for many centuries | | | | asterism | naked eye object | brighter than 5 | | A star visible without visual aids | |
Rigel | 05 14 32.2 | -08 12 06 | B8 Iae | Milky Way | 11000 to 28000 K | naked eye star | 0.12 | blue-white | for many centuries | -0.03 | 900 light-years | He I | asterism | | brighter than 5 | HR 1713 | A blue supergiant. It is a multiple star. The seventh brightest star in the night sky. | I |