S Scuti

{{Short description|Variable star in the constellation Scutum}}

{{Starbox begin}}

{{Starbox image

| image = 250px

| caption = A visual band light curve for S Scuti, plotted from ASAS data

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{{Starbox observe

|epoch=J2000

|constell=Scutum

|ra={{RA|18|50|20.03715}}{{cite journal|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|display-authors=etal|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|date=2007|arxiv=0708.1752|bibcode=2007A&A...474..653V|doi=10.1051/0004-6361:20078357|s2cid=18759600}}

|dec={{DEC|-07|54|27.4270}}

|appmag_v=6.80{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|author1=Ducati, J. R.|year=2002}}

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{{Starbox character

|class=C6₄

|b-v=

|u-b=

|variable=SRb

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{{Starbox astrometry

|radial_v=−0.20 ± 1.6{{cite journal|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053|s2cid=119231169}}

|prop_mo_ra=7.92

|prop_mo_dec=−4.55

|parallax=2.59

|p_error=0.57

|parallax_footnote=

|absmag_v=

}}

{{Starbox detail

|source=

|radius=288{{efn|name=rad}}

|luminosity={{Val|4,300|100|fmt=commas}}

|temperature=2,755

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{{Starbox catalog

|names={{odlist|BD=-08° 4726|HD=174325|HIP=92442|HR=7089|SAO=142674}}

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{{Starbox reference

|Simbad=S+Sct

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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). Its apparent magnitude is 6.80, 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. It was listed with its variable star designation, S Scuti, in Annie Jump Cannon's 1907 work Second Catalog of Variable Stars.

S Scuti is a semiregular variable star. Its class is SRb, and its pulsation cycle lasts 148 days.{{cite journal|bibcode=2010A&A...523A..18D|arxiv=1008.1083|title=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|journal=Astronomy and Astrophysics|volume=523|pages=A18|last1=De Beck|first1=E.|last2=Decin|first2=L.|last3=De Koter|first3=A.|last4=Justtanont|first4=K.|last5=Verhoelst|first5=T.|last6=Kemper|first6=F.|last7=Menten|first7=K. M.|year=2010|doi=10.1051/0004-6361/200913771|s2cid=16131273}} S Scuti is also surrounded by a roughly spherical shell of dust. The shell was known earlier from its carbon monoxide emission lines. The total mass of the dust is {{solar mass|(7 ± 2){{e|-5}}}}.