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HD 133131#Planetary system

{{short description|Binary star in the constellation Libra}}

{{Starbox begin}}

{{Starbox observe 2s

|constell=Libra

|epoch=J2000

|component1=A

|ra1={{RA|15|03|35.44599}}

|dec1={{DEC|-27|50|33.2195}}

|appmag_v1=8.40

|component2=B

|ra2={{RA|15|03|35.80805}}

|dec2={{DEC|-27|50|27.5843}}

|appmag_v2=8.42

}}

{{Starbox character

|component1=A

|type=main sequence

|class=G2V

|b-v=+0.622

|component2=B

|type2=main sequence

|class2=G2V

|b-v2=+0.622

}}

{{Starbox astrometry

| component1 = A

| radial_v = {{val|-16.37|0.19}}

| prop_mo_ra = +156.227

| prop_mo_dec = −133.767

| pm_footnote =

| parallax = 19.4325

| p_error = 0.0265

| parallax_footnote =

| component2 = B

| radial_v2 = {{val|-15.70|0.18}}

| prop_mo_ra2 = +159.010

| prop_mo_dec2 = −139.133

| pm_footnote2 =

| parallax2 = 19.4131

| p_error2 = 0.0293

| parallax_footnote2 =

}}

{{Starbox orbit

|reference=

|period=~4240

}}

{{Starbox detail

|source=

|component1=HD 133131A

|mass=0.95

|temperature={{val|fmt=commas|5799|19}}

|luminosity=9.6

|radius=1.00

|gravity={{val|4.39|0.050}}

|metal_fe={{val|−0.306|0.016}}

|rotation=23 days

|rotational_velocity=4.0

|age_gyr=6.3

|component2=HD 133131B

|mass2=0.93

|temperature2={{val|fmt=commas|5805|15}}

|luminosity2=0.98

|radius2=1.01

|gravity2={{val|4.41|0.045}}

|metal_fe2={{val|−0.281|0.013}}

|rotation2=22 days

|rotational_velocity2=7.0

|age_gyr2=5.9

}}

{{Starbox catalog

|names={{odlist|HIP=73674|HD=133131|CPD=-27°5116}}

|component1=HD 133131A

|names1={{odlist|SAO=183128|2MASS=J15033543-2750330|TYC=6756-1541-1}}

|component2=HD 133131B

|names2={{odlist|SAO=183129|2MASS=J15033579-2750273|TYC=6756-867-1}}

}}

{{Starbox reference

|Simbad=HD+133131|sn=The system

|Simbad2=HD+133131A|sn2=A

|Simbad3=HD+133131B|sn3=B

|NSTED=HD-133131

}}

{{Starbox end}}

HD 133131 is a binary star in the constellation of Libra. It is 168 light-years (51.5 parsecs) away from the Sun. It consists of two G-type main-sequence stars; neither are bright enough to be seen with the naked eye. The star was first catalogued as a binary in 1972.

Both components, HD 133131 A and B, are very similar to the Sun but are far older, about 6 billion years old. They also have low metallicities (50% of solar abundance), and HD 133131A is additionally depleted in heavy elements compared to HD 133131B, indicating a possibly past planetary engulfment event for HD 133131 B.

Planetary system

In 2016, two planets orbiting HD 133131A and one planet orbiting HD 133131B were discovered utilizing the radial velocity method. All three are long-period giant planets.

{{OrbitboxPlanet begin

| table_ref =

| name = HD 133131A

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = ≥1.43

| radius =

| semimajor = 1.44

| period = 649

| eccentricity = 0.32

| inclination =

}}

{{OrbitboxPlanet

| exoplanet = c

| mass = ≥0.63

| radius =

| semimajor = 4.79

| period = 3925

| eccentricity = 0.20

| inclination =

}}

{{Orbitbox end}}

{{OrbitboxPlanet begin

| table_ref =

| name = HD 133131B

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = ≥2.50

| radius =

| semimajor = 6.40

| period = 6119

| eccentricity = 0.62

| inclination =

}}

{{Orbitbox end}}

See also

Other systems with multiple planet-hosting stars:

References

{{reflist|refs=

{{cite simbad|title=HD 133131|accessdate = 29 September 2020}}

{{cite simbad|title=HD 133131A|accessdate = 29 September 2020}}

{{cite simbad|title=HD 133131B|accessdate = 29 September 2020}}

{{Cite Gaia DR3|6224633983987510528}}

{{Cite Gaia DR3|6224633983987511552}}

{{cite constellation|HD 133131}}

{{cite journal|arxiv=1709.05344|title=Kronos and Krios: Evidence for Accretion of a Massive, Rocky Planetary System in a Comoving Pair of Solar-type Stars

|year=2017|doi=10.3847/1538-4357/aaab4d

|last1=Oh

|first1=Semyeong

|last2=Price-Whelan

|first2=Adrian M.

|last3=Brewer

|first3=John M.

|last4=Hogg

|first4=David W.

|last5=Spergel

|first5=David N.

|last6=Myles

|first6=Justin

|journal=The Astrophysical Journal

|volume=854

|issue=2

|page=138

|s2cid=119076217

|doi-access=free

}}

{{cite journal |last1=Stock |first1=J. |last2=Wroblewski |first2=H. |date=May 1972 |title=Double stars of equal components. |journal=Astronomy and Astrophysics |volume=18 |issue= |page=341 |bibcode=1972A&A....18..341S}}

{{cite journal|bibcode=2016AJ....152..167T|doi=10.3847/0004-6256/152/6/167|arxiv=1608.06216|title=The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B|journal=The Astronomical Journal|volume=152|issue=6|pages=167|year=2016|last1=Teske|first1=Johanna K|last2=Shectman|first2=Stephen A|last3=Vogt|first3=Steve S|last4=Díaz|first4=Matías|last5=Butler|first5=R. Paul|last6=Crane|first6=Jeffrey D|last7=Thompson|first7=Ian B|last8=Arriagada|first8=Pamela|s2cid=118852162 |doi-access=free }}

{{cite journal|arxiv=1104.3186|title=Chromospheric Activity of Southern Stars from the Magellan Planet Search Program|year=2011|doi=10.1088/0004-637X/734/1/70|last1=Arriagada|first1=Pamela|journal=The Astrophysical Journal|volume=734|issue=1|page=70|bibcode=2011ApJ...734...70A|s2cid=118384591}}

{{cite journal | bibcode=2005yCat.3244....0G | title=VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005) | journal=VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G | volume=3244 | last1=Glebocki | first1=R. | last2=Gnacinski | first2=P. | year=2005 }}

}}

{{Stars of Libra}}

{{DEFAULTSORT:HD 133131}}

CD-27 10194

073674

133131

Category:G-type main-sequence stars

Category:Binary stars

Category:Libra (constellation)

Category:Planetary systems with three confirmed planets

Category:Multi-star planetary systems