epsilon Scuti

{{Short description|Star in the constellation Scutum}}

{{Starbox begin

| name = ε Scuti

}}

{{Starbox image

|image=

{{Location mark

|image=Scutum constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=Epsilon Scuti

|x=478|y=390

}}

|caption=Location of ε Scuti (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Scutum

| ra = {{RA|18|43|31.251}}

| dec = {{DEC|-8|16|30.77}}

| appmag_v = 4.88{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=91845 Vizier catalog entry]

}}

{{Starbox character

| class = G8IIb{{cite journal | bibcode=1989ApJS...71..245K | doi=10.1086/191373| title=The Perkins catalog of revised MK types for the cooler stars| journal=The Astrophysical Journal Supplement Series| volume=71| pages=245| year=1989| last1=Keenan| first1=Philip C.| last2=McNeil| first2=Raymond C.}}

| b-v = +1.12{{cite journal | bibcode=2014JAVSO..42..443M | title=Sloan Magnitudes for the Brightest Stars | journal=The Journal of the American Association of Variable Star Observers | volume=42 | pages=443 | last1=Mallama | first1=A. | year=2014 | issue=2 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=173009 Vizier catalog entry]

| u-b = +0.88{{cite journal | bibcode=2006yCat.2168....0M | title=VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991) | journal=VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie | volume=2168 | last1=Mermilliod | first1=J. C. | year=2006 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=II/168/ubvmeans&LID=%2B100173009 Vizier catalog entry]

}}

{{Starbox astrometry

| radial_v = {{Val|−9.8|0.6}}{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 | s2cid=119231169}}

| prop_mo_ra = +21.781

| prop_mo_dec = +4,591

| parallax = 5.7100

| p_error = 0.1842

| parallax_footnote = {{cite Gaia DR3|4251743058774556288}}

| absmag_v = -1.18

}}

{{Starbox detail

| temperature = 4,500{{cite journal | bibcode=2016A&A...591A.118S | doi=10.1051/0004-6361/201628497 |arxiv=1605.07384 | title=The PASTEL catalogue: 2016 version | journal=Astronomy & Astrophysics | volume=591 | pages=A118 | year=2016 | last1=Soubiran | first1=Caroline | last2=Le Campion | first2=Jean-François | last3=Brouillet | first3=Nathalie | last4=Chemin | first4=Laurent | s2cid=119258214 }}

| luminosity = 403

| rotational_velocity = 5.1{{cite journal | bibcode=1999A&AS..139..433D | doi=10.1051/aas:1999401 | title=A catalog of rotational and radial velocities for evolved stars| journal=Astronomy and Astrophysics Supplement Series | volume=139 | issue=3 | pages=433 | year=1999 | last1=De Medeiros | first1=J. R. | last2=Mayor | first2=M. | arxiv=astro-ph/0608248 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bAS/139/433/table5&Name=HD%20173009 Vizier catalog entry]

| gravity = 1.00

| metal_fe = +0.05

}}

{{Starbox catalog

| names = {{odlist | B=ε Sct | F=3 Aquilae | BD=−08°4686 | FK5=702 | HD=173009 | HIP=91845 | HR=7032 | SAO=142546 | GC=25610 | ADS=11601 | CCDM=J18435-0817A | GSC=05692-02504 | WDS=J18435-0817A }}

}}

{{Starbox reference

| Simbad = Epsilon+Scuti

}}

{{Starbox end}}

Epsilon Scuti, Latinized from ε Scuti, is a probable astrometric binary

{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 | s2cid=14878976 }} star system in the constellation Scutum. It is faintly visible to the naked eye with an apparent visual magnitude of +4.88. Based upon an annual parallax shift of 5.71 mas as seen from Earth,> it is located approximately 570 light years from the Sun. It is moving closer to the Sun with a radial velocity of −9.8 km/s.

Epsilon Scuti was a latter designation of 3 Aquilae.{{cite journal | last=Wagman | first=M. | title=Flamsteed's Missing Stars | journal=Journal for the History of Astronomy | volume=18 | issue=3 | date=August 1987 | page=212 | bibcode=1987JHA....18..209W | doi=10.1177/002182868701800305 | s2cid=118445625 }}

The visible component is a yellow-hued bright giant with a G-type bright giant It is radiating 403 times the Sun's luminosity from its photosphere at an effective temperature of 4,500 K. Epsilon Scuti has at least three faint visual companions, two 14th magnitude stars, B and D, separated from the primary by 13.6 and 15.4 arcseconds respectively, and the 13th magnitude C, which is 38 arcseconds away.{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=18435-0817 Vizier catalog entry]