Astronomy:S Scuti
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Short description: Variable star in the constellation Scutum
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Scutum |
| Right ascension | 18h 50m 20.03715s[2] |
| Declination | −07° 54′ 27.4270″[2] |
| Apparent magnitude (V) | 6.80[3] |
| Characteristics | |
| Spectral type | C64[4] |
| Variable type | SRb |
| Astrometry | |
| Radial velocity (Rv) | −0.20 ± 1.6[5] km/s |
| Proper motion (μ) | RA: 7.92[2] mas/yr Dec.: −4.55[2] mas/yr |
| Parallax (π) | 2.59 ± 0.57[2] mas |
| Distance | approx. 1,300 ly (approx. 390 pc) |
| Details | |
| Radius | 386[4] R☉ |
| Luminosity | 4634[4] L☉ |
| Temperature | 2425[4] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
S Scuti is a carbon star located in the constellation Scutum. Parallax measurements by Hipparcos put it at a distance of approximately 1,300 light-years (390 parsecs).[2] Its apparent magnitude is 6.80,[3] making it visible to the naked eye only under excellent conditions.
S Scuti is a semiregular variable star. Its class is SRb, and its pulsation cycle lasts 148 days.[4] It has a radius of 386 R☉.[4] S Scuti is also surrounded by a roughly spherical shell of dust. The shell was known earlier from its carbon monoxide emission lines.[6] The total mass of the dust is (7 ± 2)×10−5 M☉.[6]
References
- ↑ "ASAS All Star Catalogue". The All Sky Automated Survey. http://www.astrouw.edu.pl/asas/?page=aasc.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 De Beck, E.; Decin, L.; De Koter, A.; Justtanont, K.; Verhoelst, T.; Kemper, F.; Menten, K. M. (2010). "Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles. II. CO line survey of evolved stars: Derivation of mass-loss rate formulae". Astronomy and Astrophysics 523: A18. doi:10.1051/0004-6361/200913771. Bibcode: 2010A&A...523A..18D.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 Mečina, M; Kerschbaum, F; Groenewegen, M. A. T; Ottensamer, R; Blommaert, J. A. D. L; Mayer, A; Decin, L; Luntzer, A et al. (2013). "Dusty shells surrounding the carbon variables S Scuti and RT Capricorni". Astronomy & Astrophysics 566: A69. doi:10.1051/0004-6361/201321117. Bibcode: 2014A&A...566A..69M.
External links
- "V* S Sct". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+S+Sct.
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