Iota1 Scorpii
Encyclopedia
Iota¹ Scorpii is a yellow-white F-type
supergiant
with an apparent magnitude
of +3.02. (Different sources give apparent magnitudes in the range 2.99–3.03.) It is approximately 1800 light years
from Earth
. It has a 13th magnitude companion 37.5 arcseconds, or at least 20,000 astronomical unit
s (AU), away from it.
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
supergiant
Supergiant
Supergiants are among the most massive stars. They occupy the top region of the Hertzsprung-Russell diagram. In the Yerkes spectral classification, supergiants are class Ia or Ib . They typically have bolometric absolute magnitudes between -5 and -12...
with an apparent magnitude
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
of +3.02. (Different sources give apparent magnitudes in the range 2.99–3.03.) It is approximately 1800 light years
Light Years
Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....
from Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
. It has a 13th magnitude companion 37.5 arcseconds, or at least 20,000 astronomical unit
Astronomical unit
An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
s (AU), away from it.
External links
- Iota-1 Scorpii by Dr. Jim Kaler.