Properties
Based on parallax measurements, this star is located at a distance of about 690 light-years (210 parsecs) from the Earth. It has a stellar classification of A9 Ib, with the luminosity class of 'Ib' indicating it has reached the stage of its evolution where it has expanded to become a lower luminosity supergiant star.
Iota Carinae has more than seven times the Sun's mass and has expanded to roughly 43 times the Sun's radius. It is radiating about 4,900 times the luminosity of the Sun. However, this luminosity appears to vary, causing the star's apparent magnitude to range between 2.23–2.28. This energy is being radiated into space from the star's outer envelope at an effective temperature of 7,500 K, giving Iota Carinae the white hue typical of an A-type star.
Read more about this topic: Iota Carinae
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