S Scuti

S Scuti
	; A visual band light curve for S Scuti, plotted from ASAS data
Observation data; Epoch J2000 Equinox J2000
Constellation	Scutum
Right ascension	18h 50m 20.03715s
Declination	−07° 54′ 27.4270″
Apparent magnitude (V)	6.80
Characteristics
Spectral type	C64
Variable type	SRb
Astrometry
Radial velocity (Rv)	−0.20 ± 1.6 km/s
Proper motion (μ)	RA: 7.92 mas/yr ; Dec.: −4.55 mas/yr
Parallax (π)	2.59 ± 0.57 mas
Distance	approx. 1,300 ly ; (approx. 390 pc)
Details
Radius	288 R☉
Luminosity	4,300±100 L☉
Temperature	2,755 K
Other designations
	BD−08° 4726, HD 174325, HIP 92442, HR 7089, SAO 142674
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 not quite bright enough to be seen with the naked eye.

S Scuti is a semiregular variable star. Its class is SRb, and its pulsation cycle lasts 148 days.^[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]

Notes

^ Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772 K: ${\sqrt {{\biggl (}{\frac {5,772}{2,755}}{\biggr )}^{4}\cdot 4,300}}=287.84\ R_{\odot }.$

References

^ "ASAS All Star Catalogue". The All Sky Automated Survey. Retrieved 8 December 2021.
^ ^a ^b ^c ^d ^e ^f van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ ^a ^b 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.
^ ^a ^b 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. arXiv:1008.1083. Bibcode:2010A&A...523A..18D. doi:10.1051/0004-6361/200913771. S2CID 16131273.
^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
^ ^a ^b ^c Mečina, M; Kerschbaum, F; Groenewegen, M. A. T; Ottensamer, R; Blommaert, J. A. D. L; Mayer, A; Decin, L; Luntzer, A; Vandenbussche, B; Posch, Th; Waelkens, C (2013). "Dusty shells surrounding the carbon variables S Scuti and RT Capricorni". Astronomy & Astrophysics. 566: A69. arXiv:1405.2769. Bibcode:2014A&A...566A..69M. doi:10.1051/0004-6361/201321117. S2CID 118597358.

External links

"V* S Sct". SIMBAD. Centre de données astronomiques de Strasbourg.

This variable star–related article is a stub. You can help Wikipedia by expanding it.

[rad-7] Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772 K: ${\sqrt {{\biggl (}{\frac {5,772}{2,755}}{\biggr )}^{4}\cdot 4,300}}=287.84\ R_{\odot }.$

[ASASServer-1] "ASAS All Star Catalogue". The All Sky Automated Survey. Retrieved 8 December 2021.

[HIP-2] ^ ^a ^b ^c ^d ^e ^f van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.

[Ducati-3] 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.

[DeBeck-4] 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. arXiv:1008.1083. Bibcode:2010A&A...523A..18D. doi:10.1051/0004-6361/200913771. S2CID 16131273.

[5] Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.

[Mecina-6] Mečina, M; Kerschbaum, F; Groenewegen, M. A. T; Ottensamer, R; Blommaert, J. A. D. L; Mayer, A; Decin, L; Luntzer, A; Vandenbussche, B; Posch, Th; Waelkens, C (2013). "Dusty shells surrounding the carbon variables S Scuti and RT Capricorni". Astronomy & Astrophysics. 566: A69. arXiv:1405.2769. Bibcode:2014A&A...566A..69M. doi:10.1051/0004-6361/201321117. S2CID 118597358.

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Observation data Epoch J2000 Equinox J2000
A visual band light curve for S Scuti, plotted from ASAS data^[1]
Constellation	Scutum
Right ascension	18^h 50^m 20.03715^s^[2]
Declination	−07° 54′ 27.4270″^[2]
Apparent magnitude (V)	6.80^[3]
Characteristics
Spectral type	C6₄^[4]
Variable type	SRb
Astrometry

Radial velocity (R_v)	−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 mas^[2]
Distance	approx. 1,300 ly (approx. 390 pc)

Details^[6]

Radius	288^[a] `R`_☉
Luminosity	4,300±100 `L`_☉
Temperature	2,755 K

Other designations
BD−08° 4726, HD 174325, HIP 92442, HR 7089, SAO 142674
Database references
SIMBAD	data