Epoch J2000.0 Equinox J2000.0
|Right ascension||10h 44m 47.14s|
|Declination||−59° 24′ 48.13″|
|Apparent magnitude (V)||8.55|
|B−V color index||2.07|
|Variable type||irregular variable|
|Luminosity (bolometric)||180,000–220,000 L☉|
RT Car, HD 303310, HIP 52562, SAO 238424.
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RT Carinae (HD 303310, HIP 52562, SAO 238424) is a variable star in the constellation Carina. It has an apparent magnitude of +8.55. RT Carinae is a red supergiant with a spectral type of M2I with a temperature of 3625 K. With a colossal diameter of 1090 times of the Sun, it is one of the largest stars known. The luminosity is estimated between 180,000 and 220,000 times of the Sun, but most likely 200,000.
It is cataloged as an irregular variable star, and it has an oscillation period of 201 days.
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