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HD 143183 (brightest star in the image) as seen from the Rutherfurd Observatory.
Epoch J2000 Equinox J2000
|Right ascension||16h 01m 22.2226s|
|Declination||54° 08′ 35.6066″|
|Apparent magnitude (V)||8.24|
|Spectral type||M3 Ia|
|U−B color index||+0.75|
|B−V color index||+2.10|
|Radial velocity (Rv)||–±0.6639.67 km/s|
|Proper motion (μ)|| RA: –1.1 mas/yr |
Dec.: 13.1 mas/yr
|Parallax (π)||0.5559 ± 0.1021 mas|
|Distance||±6506,850 ly |
|Absolute magnitude (MV)||−7.5|
|Radius||1,480 or 1,830 R☉|
|Diameter||1,480 or 1,830 D☉|
|Surface gravity (log g)||–0.6 cgs|
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 ×10−5 M☉ per year. 5 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. HD 143183 lies approximately 1' from the 10th-magnitude O-class bright giant CD-53 6363, the second-brightest star in the cluster.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
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