HD 125612

{{Short description|Binary star system in the constellation Virgo}}

{{Starbox observe

| epoch = J2000.0

| constell = Virgo

| ra = {{RA|14|20|53.517665}}

| dec = {{DEC|-17|28|53.489700}}

| appmag_v = 8.31 / ?

}}

{{Starbox character

| type =

| class = G3V + M3- 4V

| appmag_1_passband = B

| appmag_1 = 8.938

| appmag_2_passband = J

| appmag_2 = {{val|7.179|0.023}}

| appmag_3_passband = H

| appmag_3 = {{val|6.950|0.059}}

| appmag_4_passband = K

| appmag_4 = {{val|6.838|0.026}}

| r-i =

| v-r =

| b-v = {{val|0.628|0.018}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|-18.25|0.15}}

| prop_mo_ra = {{val|-60.260|0.034}}

| prop_mo_dec = {{val|-67.314|0.027}}

| pm_footnote =

| parallax = 17.2897

| p_error = 0.0279

| parallax_footnote =

| absmag_v = 4.65

}}

{{Starbox relpos

| reference =

| epoch =

| primary = HD 125612 A

| component = HD 125612 B

| angdistsec = {{val|89.994|0.066}}

| angdistref =

| posang = {{val|162.682|0.052}}

| posangref =

| projsep = ~4,750

| projsepref =

}}

{{Starbox detail

| competent1 = HD 125612 A

| mass = {{val|1.091|0.027|u=solar mass}}
{{val|1.133|0.025}}

| radius = {{val|1.05|0.08}}

| gravity = {{val|4.41|0.05}}

| luminosity = 1.09

| temperature = {{val|5900|18|fmt=commas}}

| metal_fe = {{val|0.23|0.014}}

| age_gyr = {{val|1.351|1.127}}

| rotational_velocity = 3.2

| component2 = HD 125612 B

| mass2 = {{val|0.184|0.012}}

| age_gyr2 = 1-5

}}

{{Starbox catalog

| names = {{odlist | BD=-16°3844 | HD=125612 | HIP=70123 | GSC=06143-01696 | PPM=228650 | SAO=158501 }}

}}

{{Starbox reference

| Simbad = HD+125612

| EPE = HD+125612

| NSTED = HD+125612

}}

HD 125612 is a binary star system with three exoplanetary companions in the equatorial constellation of Virgo. It is too dim to be visible to the naked eye, having an apparent visual magnitude of 8.31. The system is located at a distance of 188 light years from the Sun based on parallax measurements, but it is drifting closer with a radial velocity of −18 km/s.

The yellow-hued primary component, designated HD 125612 A, is an ordinary G-type main-sequence star with a stellar classification of G3V, which indicates it is generating energy through hydrogen fusion at its core. It is about 1.4 billion years old and is rich in heavy elements, having a 70% greater abundance of iron compared to the Sun. The star has 109% of the mass and 105% of the girth of the Sun. It is radiating 109% of the luminosity of the Sun from its photosphere at an effective temperature of 5,900 K.

A red dwarf companion star, HD 125612 B, was detected in 2009 at a projected separation of 4750 AU. The possibility of a much closer companion to the primary star was also suggested, though this will need more observation to better define.

Planetary system

File:Diagram of the (probable) HD 125612 Star system.png

There are three known exoplanets in orbit around HD 125612 A. The first was reported in 2007 and designated HD 125612 b, but it did not fully resolve the stellar velocity variations and it was clear there were other companions. Two additional companions, HD 125612 c and d, were reported in 2009. In 2022, the inclination and true mass of the outer planet HD 125612 d were measured via astrometry.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = c

| mass = {{val|0.055|0.01|p=≥}}

| semimajor = {{val|0.0524|0.0031}}

| period = {{val|4.15514|0.00026}}

| eccentricity = {{val|0.049|0.038}}

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|3.1|0.4|p=≥}}

| semimajor = {{val|1.372|0.083}}

| period = {{val|557.04|0.35}}

| eccentricity = {{val|0.4553|0.0055}}

}}

{{OrbitboxPlanet

| exoplanet = d

| mass = {{val|7.178|0.932|0.445}}

| semimajor = {{val|3.982|0.159|0.174}}

| period = {{val|2822.7|15.0|15.3}}

| eccentricity = {{val|0.115|0.012}}

| inclination = {{val|88.195|16.306|15.980}}

}}

References

{{Reflist|refs=

{{cite journal

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

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

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

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

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

{{cite journal

| title=Five Intermediate-Period Planets from the N2K Sample

| last1=Fischer | first1=Debra A. | last2=Vogt | first2=Steven S.

| last3=Marcy | first3=Geoffrey W. | last4=Butler | first4=R. Paul

| last5=Sato | first5=Bun’ei | last6=Henry | first6=Gregory W.

| last7=Robinson | first7=Sarah | last8=Laughlin | first8=Gregory

| last9=Ida | first9=Shigeru | display-authors=1

| journal=The Astrophysical Journal

| volume=669 | issue=2 | pages=1336–1344 | year=2007

| arxiv=0704.1191 | bibcode=2007ApJ...669.1336F

| doi=10.1086/521869 | s2cid=7774321 }}

{{cite journal

| title=The HARPS search for southern extra-solar planets. XXII. Multiple planet systems from the HARPS volume limited sample

| url=http://www.aanda.org/articles/aa/full_html/2010/04/aa13523-09/aa13523-09.html

| last1=Lo Curto | first1=G. | last2=Mayor | first2=M.

| last3=Benz | first3=W. | last4=Bouchy | first4=F.

| last5=Lovis | first5=C. | last6=Moutou | first6=C.

| last7=Naef | first7=D. | last8=Pepe | first8=F.

| last9=Queloz | first9=D. | display-authors=1

| journal=Astronomy and Astrophysics

| volume=512 | at=A48 | year=2015

| bibcode=2010A&A...512A..48L | arxiv=1411.7048

| doi=10.1051/0004-6361/200913523 }}

{{cite journal

| title=Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810

| last1=Ment | first1=Kristo | last2=Fischer | first2=Debra A.

| last3=Bakos | first3=Gaspar | last4=Howard | first4=Andrew W.

| last5=Isaacson | first5=Howard | display-authors=1

| journal=The Astronomical Journal

| volume=156 | issue=5 | at=213 | year=2018

| arxiv=1809.01228 | bibcode=2018AJ....156..213M

| doi=10.3847/1538-3881/aae1f5 | s2cid=119243619 | doi-access=free }}

{{cite journal

| title=The multiplicity of exoplanet host stars New low-mass stellar companions of the exoplanet host stars HD 125612 and HD 212301

| url=http://www.aanda.org/articles/aa/full/2009/04/aa10639-08/aa10639-08.html

| last1=Mugrauer | first1=M. | last2=Neuhäuser | first2=R.

| journal=Astronomy and Astrophysics

| year=2009 | volume=494 | issue=1 | pages=373–378

| arxiv=0812.2561 | bibcode=2009A&A...494..373M

| doi=10.1051/0004-6361:200810639 | s2cid=15018915 }}

{{cite journal

| title=Abundance to age ratios in the HARPS-GTO sample with Gaia DR2. Chemical clocks for a range of [Fe/H]

| display-authors=1 | last1=Delgado Mena | first1=E.

| last2=Moya | first2=A. | last3=Adibekyan | first3=V.

| last4=Tsantaki | first4=M. | last5=González Hernández | first5=J. I.

| last6=Israelian | first6=G. | last7=Davies | first7=G. R.

| last8=Chaplin | first8=W. J. | last9=Sousa | first9=S. G.

| last10=Ferreira | first10=A. C. S. | last11=Santos | first11=N. C.

| journal=Astronomy & Astrophysics

| volume=624 | id=A78 | pages=24 | date=April 2019

| arxiv=1902.02127 | bibcode=2019A&A...624A..78D

| doi=10.1051/0004-6361/201834783 | s2cid=90259810 }}

{{cite journal

| title=Chemical abundances of 1111 FGK stars from the HARPS-GTO planet search sample. III. Sulfur

| display-authors=1 | last1=Costa Silva | first1=A. R.

| last2=Delgado Mena | first2=E. | last3=Tsantaki | first3=M.

| journal=Astronomy & Astrophysics

| volume=634 | id=A136 | pages=10 | date=February 2020

| doi=10.1051/0004-6361/201936523 | arxiv=1912.08659

| bibcode=2020A&A...634A.136C | s2cid=209405391 }}

{{cite journal

| title=Five Intermediate-Period Planets from the N2K Sample

| display-authors=1 | last1=Fischer | first1=Debra A.

| last2=Vogt | first2=Steven S. | last3=Marcy | first3=Geoffrey W.

| last4=Butler | first4=R. Paul | last5=Sato | first5=Bun'ei

| last6=Henry | first6=Gregory W. | last7=Robinson | first7=Sarah

| last8=Laughlin | first8=Gregory | last9=Ida | first9=Shigeru

| last10=Toyota | first10=Eri | last11=Omiya | first11=Masashi

| last12=Driscoll | first12=Peter | last13=Takeda | first13=Genya

| last14=Wright | first14=Jason T. | last15=Johnson | first15=John A.

| journal=The Astrophysical Journal

| volume=669 | issue=2 | pages=1336–1344 | date=November 2007

| doi=10.1086/521869 | arxiv=0704.1191

| bibcode=2007ApJ...669.1336F | s2cid=7774321 }}

{{cite journal |last1=Feng |first1=Fabo |last2=Butler |first2=R. Paul |display-authors=etal |date=August 2022 |title=3D Selection of 167 Substellar Companions to Nearby Stars |journal=The Astrophysical Journal Supplement Series |volume=262 |issue=21 |page=21 |doi=10.3847/1538-4365/ac7e57 |arxiv=2208.12720 |bibcode=2022ApJS..262...21F |s2cid=251864022 |doi-access=free }}

}}

Category:G-type main-sequence stars

Category:M-type main-sequence stars

Category:Planetary systems with three confirmed planets

Category:Virgo (constellation)

Category:Durchmusterung objects

125612

070123

Category:Binary stars

HD 125612

Planetary system

See also

References