HD 143183

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HD 143183
HD 143183.png
HD 143183 (brightest star in the image) as seen from the Rutherfurd Observatory.
Observation data
Epoch J2000      Equinox J2000
Constellation Norma
Right ascension 16h 01m 22.2226s[1]
Declination 54° 08′ 35.6066″[1]
Apparent magnitude (V) 8.24[2]
Spectral type M3 Ia[3]
U−B color index +0.75[2]
B−V color index +2.10[2]
Radial velocity (Rv)39.67±0.66[1] km/s
Proper motion (μ) RA: –1.1[4] mas/yr
Dec.: 13.1[4] mas/yr
Parallax (π)0.5559 ± 0.1021[1] mas
Distance6,850±650[3] ly
(2,100±200[3] pc)
Absolute magnitude (MV)−7.5[5]
Mass20[3] M
Radius1,480[6] or 1,830[3][7] R
Diameter1,480[6] or 1,830[3][7] D
Luminosity320,000[3][6] L
Surface gravity (log g)–0.6[3] cgs
Temperature3,570[6] K
Database references

HD 143183 is a red supergiant star of spectral type M3Ia in constellation Norma. It is a member of the Norma OB1 association, at a distance of about 2 kiloparsecs. It is one of the most luminous red supergiants with a luminosity about 300,000 times greater than the Sun (L), and is as well one of the largest stars with a radius over a thousand times that of the Sun (R). It has an estimated mass loss rate of 5×10−5 M per year.[3] It is surrounded by a dozen early-type stars and a circumstellar nebula with a radius of 0.12 parsecs (0.39 ly).

It is possible that HD 143183 is a spectroscopic binary with an OB+ companion but this is considered doubtful.[3] HD 143183 lies approximately 1' from the 10th-magnitude O-class bright giant CD-53 6363, the second-brightest star in the cluster.


  1. 1.0 1.1 1.2 1.3 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. arXiv:1804.09365. Bibcode 2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. 2.0 2.1 2.2 Klare, G.; Neckel, T. (1977). "UBV, Hβ and polarization measurements of 1660 southern OB stars". Astronomy and Astrophysics Supplement Series 27: 215. Bibcode 1977A&AS...27..215K.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Moffat, A. F. J. (August 1976). "Mass loss from the M 3 supergiant HD 143183 in a young compact star cluster in Norma". Astronomy and Astrophysics 50 (3): 429–434. Bibcode 1976A&A....50..429M.
  4. 4.0 4.1 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.
  5. Humphreys, R. M (1978). "Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way". The Astrophysical Journal Supplement Series 38: 309. Bibcode 1978ApJS...38..309H. doi:10.1086/190559.
  6. 6.0 6.1 6.2 Blum, R. D; Ramirez, Solange V; Sellgren, K; Olsen, K (2003). "Really Cool Stars and the Star Formation History at the Galactic Center". The Astrophysical Journal 597 (1): 323–346. Bibcode 2003ApJ...597..323B. doi:10.1086/378380.
  7. {{{1}}}

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