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) | 6.6 to 7.3[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | C64[5] |
| Variable type | SRb[3] |
| Astrometry | |
| Radial velocity (Rv) | −0.20±1.6[6] 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 | |
| Mass | 1.0[7] M☉ |
| Radius | 126[8] R☉ |
| Luminosity | 8,552[7] L☉ |
| Temperature | 3,000[7] 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 varies between 6.6 and 7.3,[3] making it not quite bright enough to be seen with the naked eye.
Louisa Dennison Wells discovered that the star is a variable star. Her discovery was announced in 1901.[9] It was listed with its variable star designation, S Scuti, in Annie Jump Cannon's 1907 work Second Catalog of Variable Stars.[10] S Scuti is a semiregular variable star. Its class is SRb, and its pulsation cycle lasts 148 days.[5] S Scuti is also surrounded by a roughly spherical shell of dust. The shell was known earlier from its carbon monoxide emission lines.[11] The total mass of the dust is (7±2)×10−5 M☉.[11]
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 3.2 "S Sct". AAVSO. https://vsx.aavso.org/index.php?view=detail.top&oid=34118.
- ↑ Maercker, M.; De Beck, E.; Khouri, T.; Vlemmings, W. H. T.; Gustafsson, J.; Olofsson, H.; Tafoya, D.; Kerschbaum, F. et al. (2024). "Probing the dynamical and kinematical structures of detached shells around AGB stars". Astronomy and Astrophysics 687: A112. doi:10.1051/0004-6361/202449643. Bibcode: 2024A&A...687A.112M.
- ↑ 5.0 5.1 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.
- ↑ 7.0 7.1 7.2 Liberatori, A.; Hatzidimitriou, D.; Antoniadis, K.; Pastorelli, G.; Trabucchi, M.; Groenewegen, M. A. T.; Bossini, D.; Girardi, L. et al. (2026). "A homogeneous view of asymptotic giant branch carbon stars as seen by Gaia". Astronomy and Astrophysics 708: A120. doi:10.1051/0004-6361/202558609. Bibcode: 2026A&A...708A.120L.
- ↑ Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ Pickering, E. C.; Colson, H. R.; Fleming, W. P.; Wells, L. D. (April 1901). "Sixty-four new variable stars". Astrophysical Journal 13: 226–230. doi:10.1086/140808. Bibcode: 1901ApJ....13..226P.
- ↑ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1–94. Bibcode: 1907AnHar..55....1C.
- ↑ 11.0 11.1 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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