Xi Scorpii

{{Short description|Star system}}

{{Sky|16|04|22.1|−|11|22|23|92.5}}

{{Starbox begin}}

{{Starbox observe 3s

|epoch=J2000

|constell=Scorpius

|component1=ξ Sco ABC

|ra1={{RA|16|04|22.191}}{{cite journal|title=A new star catalogue of SAO type|author1=Roeser, S.|author2=Bastian, U.|journal=Astronomy and Astrophysics Supplement Series|volume=74|pages=449–451|date=1988|bibcode=1988A&AS...74..449R}}

|dec1={{DEC|-11|22|22.60}}

|appmag_v1=4.17{{cite simbad|title=* ksi Sco|access-date=2 August 2017}}
(5.16 / 4.87 / 7.30)

|component2=Component D

|ra2={{RA|16|04|25.9260}}

|dec2={{DEC|-11|26|57.778}}

|appmag_v2=7.43{{cite simbad|title=HD 144087|access-date=2 August 2017}}

|component3=Component E

|ra3={{RA|16|04|26.7188}}

|dec3={{DEC|-11|26|59.553}}

|appmag_v3=7.81{{cite simbad|title=HD 144088|access-date=2 August 2017}}

}}

{{Starbox character

|component1=ξ Sco ABC

|class=F4(V) + F6(V) + G1V{{cite journal|title=VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications|author=Skiff, B. A.|journal=VizieR On-line Data Catalog|volume=1|date=2014|bibcode=2014yCat....1.2023S}}

|b-v=+0.45{{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1|date=1986|bibcode= 1986EgUBV........0M}}

|u-b=+0.00

|component2=Components DE

|class2=K1(V) + K1(V){{cite journal|bibcode=1999MSS...C05....0H|title=Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5|journal=Michigan Spectral Survey|volume=5|pages=0|author1=Houk, N.|author2=Swift, C.|year=1999}}

|b-v2=+0.75

|u-b2=+0.315

}}

{{Starbox astrometry

|component1=ξ Sco ABC

|radial_v={{val|-36.33|0.83}}{{cite journal|bibcode=2002A&A...382..118T|doi=10.1051/0004-6361:20011586|title=Statistics of spectroscopic sub-systems in visual multiple stars|journal=Astronomy & Astrophysics|volume=382|pages=118–123|year=2002|last1=Tokovinin|first1=A. A.|last2=Smekhov|first2=M. G.|url=https://zenodo.org/record/896317|doi-access=free}}

|prop_mo_ra=−63.2

|prop_mo_dec=−27.0

|parallax=

|p_error=

|parallax_footnote=

}}

{{Starbox astrometry|no_heading=y

|component1=Component D

|radial_v={{val|-31.96|0.13}}

|prop_mo_ra=−61.607

|prop_mo_dec=−22.227

|parallax=35.8898

|p_error=0.0200

|parallax_footnote={{cite Gaia DR3|4343064577465522816}}

|absmag_v=4.47

|component2=Component E

|radial_v2={{val|-32.28|0.12}}

|prop_mo_ra2=−56.334

|prop_mo_dec2=−20.357

|parallax2=35.8718

|p_error2=0.0237

|parallax_footnote2={{cite Gaia DR3|4343064508746082304}}

|absmag_v2=5.18{{cite journal

| last1=Boro Saikia |first1=S. |last2=Marvin |first2=C. J.

| last3=Jeffers |first3=S. V. |last4=Reiners |first4=Ansgar

| last5=Cameron |first5=R. |last6=Marsden |first6=S. C.

| last7=Petit |first7=P. |last8=Warnecke |first8=J.

| last9=Yadav |first9=A. P. |last10=Teske |first10=J. K.

| last11=Shectman |first11=S. A. |last12=Crane |first12=J. D.

| last13=Thompson |first13=I. |last14=Keiser |first14=S.

| last15=Jenkins |first15=J. S. |last16=Berdiñas |first16=Z.

| last17=Diaz |first17=M. |last18=Kiraga |first18=M.

| last19=Barnes |first19=J. R. |display-authors=1

| title=Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles

| journal=Astronomy and Astrophysics

| volume=616 | pages=A108 | year=2018

| bibcode=2018A&A...616A.108B | arxiv=1803.11123

| doi=10.1051/0004-6361/201629518 | s2cid=118915212 }}

}}

{{Starbox orbit

|reference=

|primary=ξ Sco A

|name=ξ Sco B

|period={{val|45.90|0.60}}

|periastron=B {{val|1997.22|0.02}}

|eccentricity={{val|0.744|0.001}}

|axis={{val|0.654|0.006}}

|inclination={{val|34.5|1.0}}

|node={{val|25.3|4.0}}

|periarg={{val|163.8|5.0}}

}}

{{Starbox orbit

|reference={{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=2 July 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}}

|primary=ξ Sco AB

|name=ξ Sco C

|period=1514.43

|periastron=B 2226.10

|eccentricity=0.041

|axis=7.755

|inclination=131.5

|node=47.4

|periarg=59.3

}}

{{Starbox detail

|component1 = A

| mass = 1.53{{Cite journal |last=Tokovinin |first=Andrei |date=2020-06-01 |title=Nearby Quintuple Systems κ Tucanae and ξ Scorpii |bibcode=2020AJ....159..265T |journal=The Astronomical Journal |volume=159 |issue=6 |pages=265 |doi=10.3847/1538-3881/ab8af1 |doi-access=free |arxiv=2005.04057 |issn=0004-6256}}

| temperature = 6,532

| component2 = B

| mass2 = 1.53

| temperature2 = 6,532

}}

{{Starbox detail|no_heading=y

| component1 = C

| mass = 1.00

| temperature = 5,705

}}

{{Starbox detail|no_heading=y

|component1=D

|mass=0.89

|temperature=5,529

|luminosity=0.71

|radius=0.94

|gravity=4.49

|age_gyr=2.3

|component2=E

|mass2=0.88

|temperature2=5,217

|luminosity2=0.44

|radius2=0.77

|gravity2=4.54{{cite journal | display-authors = 1 | last1 = Stassun | first1 = Keivan G. | last2 = Oelkers | first2 = Ryan J. | last3 = Paegert | first3 = Martin | last4 = Torres | first4 = Guillermo | last5 = Pepper | first5 = Joshua | last6 = Lee | first6 = Nathan De | last7 = Collins | first7 = Kevin | last8 = Latham | first8 = David W. | last9 = Muirhead | first9 = Philip S. | last10 = Chittidi | first10 = Jay | last11 = Rojas-Ayala | first11 = Bárbara | last12 = Fleming | first12 = Scott W. | last13 = Rose | first13 = Mark E. | last14 = Tenenbaum | first14 = Peter | last15 = Ting | first15 = Eric B. | last16 = Kane | first16 = Stephen R. | last17 = Barclay | first17 = Thomas | last18 = Bean | first18 = Jacob L. | last19 = Brassuer | first19 = C. E. | last20 = Charbonneau | first20 = David | last21 = Ge | first21 = Jian | last22 = Lissauer | first22 = Jack J. | last23 = Mann | first23 = Andrew W. | last24 = McLean | first24 = Brian | last25 = Mullally | first25 = Susan | last26 = Narita | first26 = Norio | last27 = Plavchan | first27 = Peter | last28 = Ricker | first28 = George R. | last29 = Sasselov | first29 = Dimitar | last30 = Seager | first30 = S. | last31 = Sharma | first31 = Sanjib | last32 = Shiao | first32 = Bernie | last33 = Sozzetti | first33 = Alessandro | last34 = Stello | first34 = Dennis | last35 = Vanderspek | first35 = Roland | last36 = Wallace | first36 = Geoff | last37 = Winn | first37 = Joshua N. | title = The Revised TESS Input Catalog and Candidate Target List | journal = The Astronomical Journal | date = 9 September 2019 | volume = 158 | issue = 4 | page = 138 | eissn = 1538-3881 | doi = 10.3847/1538-3881/ab3467 | bibcode = 2019AJ....158..138S | arxiv = 1905.10694 | doi-access = free}}

|age_gyr2=2.3{{cite journal |bibcode=2020ApJ...898...27S |title=BAFFLES: Bayesian Ages for Field Lower-mass Stars |last1=Stanford-Moore |first1=S. Adam |last2=Nielsen |first2=Eric L. |last3=De Rosa |first3=Robert J. |last4=MacIntosh |first4=Bruce |last5=Czekala |first5=Ian |journal=The Astrophysical Journal |date=2020 |volume=898 |issue=1 |page=27 |doi=10.3847/1538-4357/ab9a35 |arxiv=2006.04811 |doi-access=free }}

}}

{{Starbox catalog

|component1=Components ABC

|names1={{odlist|B=ξ Sco|ADS=9909|BD=−10°4237|GJ=9540|HIP=78727|SAO=159665 (only AB)}}

|component2=ξ Sco A

|names2={{odlist|HD=144070|HR=5978}}

|component3=ξ Sco B

|names3={{odlist|HD=144069|HR=5977}}

|component4=ξ Sco C

|names4={{odlist|SAO=159666}}

}}

{{Starbox catalog

|component1=Components DE

|names1={{odlist|ADS=9910|GJ=9541|}}

|component2=Component D

|names2={{odlist|BD=−11°4057|HD=144087|HIP=78738|SAO=159668}}

|component3=Component E

|names3={{odlist|BD=−11°4058|HD=144088|HIP=78739|SAO=159670}}

}}

{{Starbox reference

|Simbad=*+ksi+Sco|sn=ξ Sco ABC

|Simbad2=NAME+*+ksi+Sco+AB|sn2=ξ Sco AB

|Simbad3=*+ksi+Sco+A|sn3=ξ Sco A

|Simbad4=*+ksi+Sco+B|sn4=ξ Sco B

|Simbad5=*+ksi+Sco+C|sn5=ξ Sco C

|Simbad6=HD+144087|sn6=Component D

|Simbad7=HD+144088|sn7=Component E

|ARICNS=02736|an=ξ Sco A

|ARICNS2=02737|an2=ξ Sco B

|ARICNS3=02738|an3=ξ Sco C

|ARICNS4=02739|an4=ξ Sco D

|ARICNS5=02740|an5=ξ Sco E

}}

{{Starbox end}}

Xi Scorpii (ξ Sco) is part of a quintuple star system in the constellation Scorpius. It was assigned this designation by Bayer, although Ptolemy had catalogued the star in Libra. Flamsteed assigned it the designation 51 Librae, but this has fallen out of use since modern constellation boundaries assign the star to Scorpius.