Astronomy:Trumpler 27-1
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 36m 10.1189s[1] |
| Declination | −33° 29′ 40.620″[1] |
| Apparent magnitude (V) | 8.79[2] |
| Characteristics | |
| Evolutionary stage | Red supergiant |
| Spectral type | M0Ia[2] |
| Astrometry | |
| Radial velocity (Rv) | −16.84 ± 0.82[1] km/s |
| Proper motion (μ) | RA: 0.223[1] mas/yr Dec.: −1.179[1] mas/yr |
| Parallax (π) | 0.4020 ± 0.0770[1] mas |
| Distance | approx. 8,000 ly (approx. 2,500 pc) |
| Details | |
| Radius | 1,073[3] R☉ |
| Luminosity | 215,000 – 261,000[3] L☉ |
| Surface gravity (log g) | -0.24[4] cgs |
| Metallicity [Fe/H] | +0.15[4] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
Trumpler 27-1 is a red supergiant star that is a member of the massive, possible open cluster Trumpler-27, where a blue giant star, a yellow supergiant star , and two Wolf–Rayet stars are also located.
Observation history
Trumpler 27-1 was discovered and catalogued when the open cluster (not confirmed then) was first identified in the late 20th century.[citation needed] It has since remained largely unobserved, being featured in the Gaia Catalogue and other pieces of literature.[5]
Physical properties
Trumpler 27-1 is among the largest stars known, with a radius of over 1,000 solar radii, one estimate giving 1,073 R☉ and another giving a size of over 1,300 solar radii.[5] This star's spectral type is M0Ia,[3] meaning it possesses a cool temperature of below 3,800 K. So far, Trumpler 27-1 is the only identified red supergiant in the open cluster Trumpler 27.[citation needed]
Location
Trumpler 27–1, and the open cluster in which it is located, is in the constellation of Scorpius.
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
- ↑ 2.0 2.1 2.2 "CD-33 12241". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CD-33+12241.
- ↑ 3.0 3.1 3.2 Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal 158 (1): 20. doi:10.3847/1538-3881/ab1cbd. Bibcode: 2019AJ....158...20M.
- ↑ 4.0 4.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedstarhorse - ↑ 5.0 5.1 Stassun, Keivan G. et al. (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
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