Summary
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 data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[1] |
| 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 |
| Temperature | 3,222[4] – 3,790[3] K |
| Metallicity [Fe/H] | +0.15[4] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
Observation history edit
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 edit
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 edit
Trumpler 27–1, and the open cluster in which it is located, is in the constellation of Scorpius.
See also edit
References edit
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (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.
- ^ a b c "CD-33 12241". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 17 July 2020.
- ^ a b c d 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. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.
- ^ a b c Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
- ^ a b Stassun, Keivan G.; et al. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.