SMC 018136

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SMC 018136
Small Magellanic Cloud (Digitized Sky Survey 2).jpg
SMC 18136 is visible in the full-size image
Observation data
Epoch J2000      Equinox J2000
Constellation Tucana
Right ascension Template:Deg2HMS[1]
Declination -73° 44m 53.93s[1]
Apparent magnitude (V) 11.61[2]
Spectral type M0Ia[3]
Apparent magnitude (K) 7.849 ± 0.020[1]
Radial velocity (Rv)185.7[4] km/s
Radius1,310[5] R
Diameter1,310[5] D
Luminosity254,000[5] L
Temperature3,575[5] K
Other designations
TYC 9138-1852-1, 2MASS J00505609-7215060, GSC 09138-01852
Database references

SMC 018136, also known as PMMR 37, is a M-type supergiant star with a temperature of 3,575 K and a radial velocity of 185.7 km/s located in the Small Magellanic Cloud.

Stellar Properties[edit]

SMC 018136 is a red supergiant of spectral type M3.5Ia with an effective temperature 3,575 K, a bolometric luminosity over 200,000 times more than Sun, and a radius over 1,300 times wider than the sun, making it one of the largest stars so far discovered. If it were in the place of the Sun, its photosphere would at least engulf the orbit of Jupiter. This would make it the largest star in the Small Magellanic Cloud.

See also[edit]


  1. 1.0 1.1 1.2 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. Bibcode 2000A&A...355L..27H.
  3. Humphreys, R. M. (1979). "M supergiants and the low metal abundances in the Small Magellanic Cloud". Astrophysical Journal 231: 384. Bibcode 1979ApJ...231..384H. doi:10.1086/157201.
  4. González-Fernández, Carlos; Dorda, Ricardo; Negueruela, Ignacio; Marco, Amparo (2015). "A new survey of cool supergiants in the Magellanic Clouds". Astronomy & Astrophysics 578: A3. arXiv:1504.00003. Bibcode 2015A&A...578A...3G. doi:10.1051/0004-6361/201425362.
  5. 5.0 5.1 5.2 Levesque, E. M.; Massey, P.; Olsen, K. A. G.; Plez, B.; Meynet, G.; Maeder, A. (2006). "The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity". The Astrophysical Journal 645 (2): 1102. arXiv:astro-ph/0603596. Bibcode 2006ApJ...645.1102L. doi:10.1086/504417.

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Template:Stars of Tucana