V774 Sagittarii
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 54m 26.13216509s[1] |
| Declination | −23° 14′ 09.660274353″[1] |
| Apparent magnitude (V) | 12.5−13.9[2] |
| Characteristics | |
| Evolutionary stage | Red hypergiant |
| Spectral type | M4I[3] |
| Apparent magnitude (B) | 12.16[4] |
| Apparent magnitude (V) | 9.606[4] |
| Apparent magnitude (G) | 6.8769[1] |
| Apparent magnitude (J) | 2.624 |
| Apparent magnitude (H) | 1.621 |
| Apparent magnitude (K) | 1.105 |
| Details | |
| Radius | 1,310[5] R☉ |
| Temperature | 3,284[1] K |
V774 Sagittarii is a red supergiant star in the constellation of Sagittarius.[3] It is one of the largest stars known with a measured radius of 1,310 R☉.[5] It has a spectral type of M4I.[3]
References[edit]
- ↑ 1.0 1.1 1.2 1.3 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. Gaia DR2 record for this source at VizieR.
- ↑ "GCVS Query=V774 Sgr". General Catalogue of Variable Stars @ Sternberg Astronomical Institute, Moscow, Russia.
- ↑ 3.0 3.1 3.2 Winfrey, S.; Barnbaum, C.; Morris, M.; Omont, A. (December 1994). "Spectral Classification of Cold IRAS Stars: Supergiants". AAS. 185: 45.15. Bibcode:1994AAS...185.4515W.
- ↑ 4.0 4.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000-03-01). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- ↑ 5.0 5.1 Cruzalèbes, P.; Petrov, R. G.; Robbe-Dubois, S.; Varga, J.; Burtscher, L.; Allouche, F.; Berio, P.; Hofmann, K. H.; Hron, J.; Jaffe, W.; Lagarde, S.; Lopez, B.; Matter, A.; Meilland, A.; Meisenheimer, K.; Millour, F.; Schertl, D. (2019). "A catalogue of stellar diameters and fluxes for mid-infrared interferometry". Monthly Notices of the Royal Astronomical Society. 490 (3): 3158–3176. arXiv:1910.00542. Bibcode:2019MNRAS.490.3158C. doi:10.1093/mnras/stz2803. Unknown parameter
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