SMC 018136, also known as PMMR 37, is a red supergiant star located in the Small Magellanic Cloud. It is one of the largest stars and one of the most luminous SMC cool supergiants so far discovered, with a radius of 945 times that of the sun and a bolometric luminosity almost 200,000 times more than Sun. If it were in the place of the Sun, its photosphere would at least engulf the orbit of Mars.
SMC 018136 has a spectral type M0 Ia and an effective temperature 3,900 K, although more recent papers suggest it has a slightly earlier spectral type of K4.5 Ia-Ib.
See also
List of largest stars
HV 11423
VY Canis Majoris
References
Stars in the Small Magellanic Cloud
Tucana (constellation) M-type supergiants K-type supergiants J00505609-7215060 Extragalactic stars PMMR objects