Atlas (star)

{{Short description|Triple star system in the constellation Taurus}}

{{Starbox begin|name=Atlas}}

{{Starbox image

| image =

{{Location mark

| image = Pleiades large.jpg | width = 280

| alt = Image of the Pleiades star cluster | float = center

| mark = Red circle.svg | mark_width = 30

| x = 115 | y = 430

}}

| caption = Atlas in the Pleiades cluster (circled)

}}

{{Starbox observe

|epoch=J2000

|constell=Taurus

|ra={{RA|03|49|09.74258}}

|dec={{DEC|+24|03|12.3003}}

|appmag_v=3.63{{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}} (3.84 / 5.46){{cite web|url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars|publisher=United States Naval Observatory|access-date=21 June 2017|archive-date=1 August 2017|archive-url=https://web.archive.org/web/20170801102553/http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|url-status=dead}}

}}

{{Starbox character

|class=B8III{{cite journal|bibcode=2015ApJ...804..146D|doi=10.1088/0004-637X/804/2/146|arxiv=1501.03154|title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets|journal=The Astrophysical Journal|volume=804|issue=2|pages=146|year=2015|last1=David|first1=Trevor J.|last2=Hillenbrand|first2=Lynne A.|s2cid=33401607}}

|b-v=−0.08{{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|date=1986|bibcode= 1986EgUBV........0M}}

|u-b=−0.36

|variable=SPB{{cite web |title=NSV 1345 |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=39969 |website=The International Variable Star Index |publisher=AAVSO |access-date=8 October 2022}}

}}

{{Starbox astrometry

|radial_v={{val|8.5|2}}{{cite journal|title=General catalogue of stellar radial velocities|journal=Washington|author=Wilson, Ralph Elmer|date=1953|bibcode=1953GCRV..C......0W}}

|prop_mo_ra=+19.079

|prop_mo_dec=−46.193

|pm_footnote=

|parallax=8.1184

|p_error=0.4791

|parallax_footnote={{cite Gaia EDR3|66526127137440128}}

|dist_ly={{cvt|132|±|4|pc|ly|disp=number}}

|dist_pc={{val|132|4}}

|absmag_v=−1.82{{cite journal

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644 }}

}}

{{Starbox orbit

|reference={{cite journal|bibcode=2004A&A...425L..45Z|doi=10.1051/0004-6361:200400062|arxiv=astro-ph/0408430|title=A purely geometric distance to the binary star Atlas, a member of the Pleiades|journal=Astronomy & Astrophysics|volume=425|issue=3|pages=L45|year=2004|last1=Zwahlen|first1=N.|last2=North|first2=P.|last3=Debernardi|first3=Y.|last4=Eyer|first4=L.|last5=Galland|first5=F.|last6=Groenewegen|first6=M. A. T.|last7=Hummel|first7=C. A.|s2cid=37047575}}

|primary=Aa1

|name=Aa2

|period_unitless={{val|290.984|0.079|ul=d}}

|axis_unitless={{val|13.08|0.12|ul=mas}}

|inclination={{val|107.87|0.49}}

|node={{val|154.0|0.7}}

|periastron=JD {{val|2450583.0|1.9}}

|eccentricity={{val|0.2385|0.0063}}

|periarg={{val|151.9|2.2}}

|k1={{val|26.55|1.41}}

|k2={{val|36.89|0.22}}

}}

{{Starbox detail

|component1=Aa1

|mass={{val|4.74|0.25}}

|radius={{val|7.9|0.8}}

|temperature={{val|13500|300|fmt=commas}}{{cite journal |doi=10.3847/1538-4357/ab04b2 |title=Angular Sizes, Radii, and Effective Temperatures of B-type Stars from Optical Interferometry with the CHARA Array |year=2019 |last1=Gordon |first1=Kathryn D. |last2=Gies |first2=Douglas R. |last3=Schaefer |first3=Gail H. |last4=Huber |first4=Daniel |last5=Ireland |first5=Michael |journal=The Astrophysical Journal |volume=873 |issue=1 |page=91 |bibcode=2019ApJ...873...91G |s2cid=125181833 |doi-access=free }}

|rotational_velocity=182

|luminosity=

|gravity={{val|3.32|0.09}}

|metal_fe=

|age_gyr=

|component2=Aa2

|mass2={{val|3.42|0.25}}

|radius2={{val|3.2|0.3}}

|temperature2=13,660

|gravity2={{val|3.96|0.09}}

}}

{{Starbox detail|no_heading=y

|component1 = Ab

|mass=2.09

}}

{{Starbox catalog

|names={{odlist|F=27 Tau|BD=+23°557|FK5=142|HD=23850|HIP=17847|HR=1178|SAO=76228}}

}}

{{Starbox reference

|Simbad=27+Tau

}}

{{Starbox end}}

Atlas {{IPAc-en|'|æ|t|l|@|s}},{{cite book

|last1=Kunitzsch |first1=Paul

|last2=Smart |first2=Tim

|date = 2006 |edition = 2nd rev.

|title = A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations

|publisher = Sky Pub |location = Cambridge, Massachusetts

|isbn = 978-1-931559-44-7

}} designation 27 Tauri, is a triple star system in the constellation of Taurus. It is a member of the Pleiades, an open star cluster (M45). It is 431 light-years (132 parsecs) away, and is 3.92 degrees north of the ecliptic.