KW Sagittarii
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Star KW Sagittarii |
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| AladinLite | |||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Sagittarius | ||||||||||
| Right ascension | 17 h 52 m 0.73 s | ||||||||||
| declination | −28 ° 01 ′ 20.5 ″ | ||||||||||
| Apparent brightness | 8.58 likes | ||||||||||
| Typing | |||||||||||
| Spectral class | M0 I-M4 Ia | ||||||||||
| Variable star type | SRC | ||||||||||
| Astrometry | |||||||||||
| Radial velocity | (−7.4) km / s | ||||||||||
| parallax | (0.53 ± 0.14) mas | ||||||||||
| distance | (6200 +2200−1300) Ly (1,900) pc |
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| Proper movement | |||||||||||
| Rec. Share: | (+0.39 ± 1.20) mas / a | ||||||||||
| Dec. portion: | (−1.62 ± 0.76) mas / a | ||||||||||
| Physical Properties | |||||||||||
| Dimensions | (20 to 40) M ☉ | ||||||||||
| radius | (1009 ± 142) R ☉ | ||||||||||
| Luminosity |
(170000 +170000−80000) L ☉ |
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| Effective temperature | (3720 ± 183) K. | ||||||||||
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Other names and catalog entries |
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KW Sagittarii is a red supergiant in our Milky Way . It is about 9,800 light years from our Sun and one of the largest known stars .
The "KW" part of the name follows the rules for naming variable stars and states that KW Sagittarii is the 256th variable star discovered in the constellation Sagittarius .
Web links
Individual evidence
- ↑ a b c KW Sgr. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 9, 2018 .
- ^ Hipparcos catalog (ESA 1997)
- ↑ a b KW Sgr. In: VSX. AAVSO, accessed September 9, 2018 .
- ^ Hipparcos, the New Reduction (van Leeuwen, 2007)
- ↑ a b c d B. Arroyo-Torres, M. Wittkowski, JM Marcaide, PH Hauschildt: The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii. Astronomy and Astrophysics , June 2013, accessed February 24, 2015 .