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 0h 50m 56.095s[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
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.

See also[edit]


  1. ^ a b c "2MASS". VizieR. Centre de Données astronomiques de Strasbourg. Retrieved 27 March 2017.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (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. ^ a b c 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.