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Coordinates: Sky map 23h 41m 51.5299s, −05° 59′ 08.726″
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{{short description|Multiple star system in the constellation Aquarius}}
{{Starbox begin
{{Starbox begin}}
| name = [[Henry Draper catalogue|HD]] 222582
}}
{{Starbox observe
{{Starbox observe
| epoch = J2000
| epoch = J2000
| constell=[[Aquarius (constellation)|Aquarius]]
| constell = [[Aquarius (constellation)|Aquarius]]
| ra = {{RA|23|41|51.53}}<ref name="van Leeuwen2007"/>
| ra = {{RA|23|41|51.5301}}<ref name="Gaia DR3"/>
| dec = {{DEC|–05|59|08.7}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|–05|59|08.729}}<ref name="Gaia DR3"/>
| appmag_v = 7.685 ± 0.005<ref name=mnras384_1_173/>
| appmag_v = {{val|7.685|0.005}}<ref name=mnras384_1_173/>
}}
}}
{{Starbox character
{{Starbox character
| type = [[Main sequence]]
| class=G5
|component1= HD 222582A
| b-v=0.648
|component2= HD 222582B
| u-b=
| class = G5V<ref name=Houk_Swift_1999/>
| variable=
|class2=M4.5V<ref name=Montes2018/>
| b-v = {{val|0.648|0.002}}<ref name=Lorenzo-Oliveira_et_al_2018/>
| u-b =
| variable =
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = 11.5 ± 0.2
| radial_v = {{val|+12.020|0.0004}}<ref name=Soubiran_et_al_2018/>
| prop_mo_ra = -144.88 ± 0.88<ref name="van Leeuwen2007"/>
| prop_mo_ra = {{val|−145.492|(29)}}
| prop_mo_dec = -111.93 ± 0.56<ref name="van Leeuwen2007"/>
| prop_mo_dec = {{val|−111.458|(21)}}
| pm_footnote = <ref name="Gaia DR3"/>
| parallax = 23.94
| p_error = 0.74
| parallax = 23.7955
| p_error = 0.0238
| parallax_footnote = <ref name="van Leeuwen2007"/>
| absmag_v = 4.44 ± 0.12<ref name=mnras384_1_173/>
| parallax_footnote = <ref name="Gaia DR3"/>
| absmag_v = {{val|4.44|0.12}}<ref name=mnras384_1_173/>
}}
{{Starbox relpos
| reference = <ref name=Montes2018/>
| epoch = 2018
| primary = HD 222582A
| component = HD 222582B
| angdistsec = 109.56{{±|0.18}}
| angdistmas =
| angdistref = <!--Reference for angular distance -->
| posang = 299.52{{±|0.03}}
| posangref = <!--Reference for position angle -->
| projsep = {{val|4637|59|ul=AU}}
| projsepref = <!--Reference for projected separation -->
}}
}}
{{Starbox detail
{{Starbox detail
| component1 = A
| mass=1.00<ref name=mnras384_1_173/>
|component2=Ba+Bb
| radius=1.16 ± 0.07<ref name=mnras384_1_173/>
| mass = {{val|0.993|0.035}}<ref name=Soto_Jenkins_2018/>
| luminosity=1.2
| temperature=5776 ± 70<ref name=mnras384_1_173/>
|mass2=0.2<ref name=oepc/>
| gravity=4.34 ± 0.10<ref name=mnras384_1_173/>
| radius = {{val|1.137|0.017}}<ref name=Soto_Jenkins_2018/>
| metal_fe=-0.01 ± 0.07<ref name=mnras384_1_173/>
| luminosity = {{val|1.302|0.005|0.004}}<ref name="Gaia DR2"/>
| temperature = {{Val|5790|3|fmt=commas}}<ref name=Lorenzo-Oliveira_et_al_2018/>
| rotational_velocity=1.5 ± 1.0<ref name=mnras384_1_173/>
| gravity = {{Val|4.370|0.009}}<ref name=Lorenzo-Oliveira_et_al_2018/>
| age_gyr=6.16
| metal_fe = {{Val|−0.005|0.003}}<ref name=Lorenzo-Oliveira_et_al_2018/>
| rotational_velocity = {{Val|1.74|0.12}}<ref name=dosSantos2016/>
| age_gyr = {{val|6.7|0.3}}<ref name=Lorenzo-Oliveira_et_al_2018/>
}}
}}
{{Starbox catalog
{{Starbox catalog
| names = {{odlist | BD=-06°6262 | GC=32912 | HD=222582 | HIP=116906 | NLTT=57682 | SAO=146849 | WDS=J23419-0559A|2MASS=J23415154-0559086}}<ref name=SIMBAD/>
| names=[[Bonner Durchmusterung|BD]]-06° 6262, [[Boss General Catalogue|GC]] 32912, [[Henry Draper Catalogue|HD]] 222582, [[Hipparcos catalogue|HIP]] 116906, [[NLTT]] 57682, [[SPOCS]] 1030, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 146849.
}}
}}
{{Starbox reference
{{Starbox reference
| Simbad=HD+222582
| Simbad = HD+222582
}}
}}
|- style="background-color: #A0B0FF;" colspan="3"
|- style="background-color: #A0B0FF;" colspan="3"
Line 45: Line 65:
| '''HD 222582 b''' || [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+222582b Data Simbad]
| '''HD 222582 b''' || [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+222582b Data Simbad]
|- bgcolor="#FFFAFA"
|- bgcolor="#FFFAFA"
| || [http://exoplanet.eu/star.php?st=HD+222582 Data ExoPlanet]
| || [https://web.archive.org/web/20071106055720/http://exoplanet.eu/star.php?st=HD+222582 Data ExoPlanet]
{{starbox sources|HIP|CCDM|HR}}
{{Starbox end}}
{{Starbox end}}


'''HD 222582''' is a multiple [[star]] system in the [[celestial equator|equatorial]] [[constellation]] of [[Aquarius (constellation)|Aquarius]]. It is invisible to the naked eye with an [[apparent visual magnitude]] of 7.7,<ref name=mnras384_1_173/> but can be viewed with binoculars or a small telescope.<ref name=ICQ/> The system is located at a distance of 137&nbsp;[[light year]]s from the [[Sun]] based on [[stellar parallax|parallax]],<ref name="Gaia DR3"/> and it is drifting further away with a [[radial velocity]] of +12&nbsp;km/s.<ref name=Soubiran_et_al_2018/> It is located close enough to the [[ecliptic]] that it is subject to [[lunar occultation]]s.<ref name=Richichi2003/>
'''HD 222582''' is a [[apparent magnitude|magnitude]] 7.7 [[star]] approximately 136 [[light-year]]s away in the [[constellation]] of [[Aquarius (constellation)|Aquarius]]. In 1999, a dense [[superjovian]] [[extrasolar planet|planet]] was announced orbiting the star by [[Steven Vogt]].

There is a [[red dwarf]] companion star in a wide orbit.
The primary member of this system, designated component A, is an ordinary [[G-type main-sequence star]] with a [[stellar classification]] of G5V.<ref name=Houk_Swift_1999/> The physical properties of the star are similar enough to the Sun that it is considered a candidate [[solar twin]].<ref name=Reddy_Lambert_2017/><ref name=Lorenzo-Oliveira_et_al_2018/> It is about 6.5<ref name=dosSantos2016/>&nbsp;billion years old with an [[Chromospheric activity|inactive chromosphere]]<ref name=Reddy_Lambert_2017/> and is spinning with a low [[projected rotational velocity]] of 1.7&nbsp;km/s.<ref name=dosSantos2016/> The mass<ref name=Soto_Jenkins_2018/> and [[metallicity]]<ref name=Lorenzo-Oliveira_et_al_2018/> of this star are essentially the same as the Sun. It has a 14% larger radius and is radiating 1.3 times the luminosity of the Sun from its [[photosphere]] at an [[effective temperature]] of 5,790&nbsp;K.<ref name=Lorenzo-Oliveira_et_al_2018/>

Component B of this system is a [[close binary]]<ref name="Riddle2015"/><ref name="Raghavan2006"/> system with the components designated HD 222582 Ba and Bb. The pair have a combined class of M4.5 V+<ref name=Montes2018/> and about 20% the mass of the Sun.<ref name=oepc/>

==Planetary system==
In November 1999, a dense [[superjovian]] [[extrasolar planet|planet]] was announced orbiting the primary by the [[California and Carnegie Planet Search]]. Designated component 'b', it was discovered using the [[radial velocity method]], using 24 observations over a period of 1.5 years. The exoplanet is orbiting with a period of {{convert|572|days|years|disp=out|abbr=off}} and a very large [[orbital eccentricity|eccentricity]] of 0.76, ranging in distance from {{val|0.39|u=AU}} out to {{val|2.31|u=AU}} away from the primary.<ref name="Keck"/><ref name="Vogt2000"/>

{{OrbitboxPlanet begin
{{OrbitboxPlanet begin
|name = HD 222582
| name = HD 222582
}}
}}
{{OrbitboxPlanet
{{OrbitboxPlanet
| exoplanet = [[HD 222582 b|b]]
| exoplanet = [[HD 222582 b|b]]
| mass = >7.75
| mass = 8.37<ref name=exoplanets/>
| period = 572
| period = 572
| semimajor = 1.35
| semimajor = 1.35
| eccentricity = 0.76
| eccentricity = 0.76
| year = 1999
}}
{{OrbitboxPlanet hypothetical
| exoplanet = c
| mass = >0.0513
| period = 15.144
| semimajor = 0.12
| eccentricity = 0.5632
| year = 2006
}}
}}
{{Orbitbox end}}
{{Orbitbox end}}


== See also ==
==See also==

* [[HD 224693]]
* [[HD 224693]]
* [[List of extrasolar planets]]
* [[List of exoplanets discovered before 2000]] - [[HD 222582 b]]

== References ==


==References==
{{reflist|refs=
{{reflist|refs=


<ref name="Gaia DR2">{{Cite Gaia DR2|2440578577126302336}}</ref>
<ref name=mnras384_1_173>{{citation | last1=Fuhrmann | first1=Klaus | title=Nearby stars of the Galactic disc and halo - IV | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=384 | issue=1 | pages=173–224 |date=February 2008 | doi=10.1111/j.1365-2966.2007.12671.x | bibcode=2008MNRAS.384..173F }}</ref>


<ref name="Gaia DR3">{{Cite Gaia DR3|2440578577126302336}}</ref>
<ref name="van Leeuwen2007">{{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=116516 Vizier catalog entry ] </ref>


<ref name=Montes2018>{{cite journal
}}
| title=Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics
| last1=Montes | first1=D. | last2=González-Peinado | first2=R.
| last3=Tabernero | first3=H. M. | last4=Caballero | first4=J. A.
| last5=Marfil | first5=E. | last6=Alonso-Floriano | first6=F. J.
| last7=Cortés-Contreras | first7=M. | last8=González Hernández | first8=J. I.
| last9=Klutsch | first9=A. | last10=Moreno-Jódar | first10=C.
| display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society
| volume=479 | issue=1 | pages=1332–1382 | date=September 2018
| doi=10.1093/mnras/sty1295 | arxiv=1805.05394
| bibcode=2018MNRAS.479.1332M | s2cid=119260219 }}</ref>


<ref name=Soto_Jenkins_2018>{{cite journal
* {{cite journal | author=S. S. Vogt ''et al.'' | title=Six New Planets from the Keck Precision Velocity Survey | journal=[[The Astrophysical Journal]] | year=2000 | volume=536 | issue=2 | pages=902–914 | doi=10.1086/308981 | bibcode=2000ApJ...536..902V|arxiv = astro-ph/9911506 }}
| title=Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES). I. Code description and dwarf stars catalogue
* {{cite journal | author=D. Raghavan ''et al.'' | title=Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems | journal=[[The Astrophysical Journal]] | volume=646 | issue=1 | pages=523–542 | year=2006 | doi=10.1086/504823 | bibcode=2006ApJ...646..523R|arxiv = astro-ph/0603836 }}
| last1=Soto | first1=M. G. | last2=Jenkins | first2=J. S.
| journal=Astronomy & Astrophysics
| volume=615 | id=A76 | pages=28 | date=July 2018
| arxiv=1801.09698 | bibcode=2018A&A...615A..76S
| doi=10.1051/0004-6361/201731533 | s2cid=119107228 }}</ref>


<ref name=Lorenzo-Oliveira_et_al_2018>{{cite journal
== External links ==
| title=The Solar Twin Planet Search. The age-chromospheric activity relation
| display-authors=1 | last1=Lorenzo-Oliveira | first1=Diego
| last2=Freitas | first2=Fabrício C. | last3=Meléndez | first3=Jorge
| last4=Bedell | first4=Megan | last5=Ramírez | first5=Iván
| last6=Bean | first6=Jacob L. | last7=Asplund | first7=Martin
| last8=Spina | first8=Lorenzo | last9=Dreizler | first9=Stefan
| last10=Alves-Brito | first10=Alan | last11=Casagrande | first11=Luca
| journal=Astronomy & Astrophysics
| volume=619 | id=A73 | pages=10 | date=November 2018
| arxiv=1806.08014 | bibcode=2018A&A...619A..73L
| doi=10.1051/0004-6361/201629294 | s2cid=118995412 }}</ref>

<ref name=Reddy_Lambert_2017>{{cite journal
| title=Solar Twins and the Barium Puzzle
| last1=Reddy | first1=Arumalla B. S. | last2=Lambert | first2=David L.
| journal=The Astrophysical Journal
| volume=845 | issue=2 | id=151 | pages=14 | date=August 2017
| arxiv=1707.07051 | bibcode=2017ApJ...845..151R
| doi=10.3847/1538-4357/aa81d6 | s2cid=119232784 | doi-access=free }}</ref>

<ref name=Richichi2003>{{cite journal
| title=Lunar occultations of stars with exoplanet candidates
| last=Richichi | first=A.
| journal=Astronomy and Astrophysics
| volume=397 | pages=1123–1127 | date=January 2003
| issue=3 | bibcode=2003A&A...397.1123R | doi=10.1051/0004-6361:20021585 | doi-access=free }}</ref>

<ref name=ICQ>{{cite web
| title=The astronomical magnitude scale
| work=International Comet Quarterly
| url=http://www.icq.eps.harvard.edu/MagScale.html
| access-date=2020-12-31 }}</ref>

<ref name=Houk_Swift_1999>{{cite journal
| last1=Houk | first1=N. | last2=Swift | first2=C.
| title=Michigan catalogue of two-dimensional spectral types for the HD Stars
| journal=Michigan Spectral Survey
| volume=5 | year=1999 | bibcode=1999MSS...C05....0H }}</ref>

<ref name=SIMBAD>{{cite simbad | title=HD 222582 | access-date=2020-12-31 }}</ref>

<ref name=Soubiran_et_al_2018>{{cite journal
| title=Gaia Data Release 2. The catalogue of radial velocity standard stars
| last1=Soubiran | first1=C. | last2=Jasniewicz | first2=G.
| last3=Chemin | first3=L. | last4=Zurbach | first4=C.
| last5=Brouillet | first5=N. | last6=Panuzzo | first6=P.
| last7=Sartoretti | first7=P. | last8=Katz | first8=D.
| last9=Le Campion | first9=J. -F. | last10=Marchal | first10=O.
| last11=Hestroffer | first11=D. | last12=Thévenin | first12=F.
| last13=Crifo | first13=F. | last14=Udry | first14=S.
| last15=Cropper | first15=M. | last16=Seabroke | first16=G.
| last17=Viala | first17=Y. | last18=Benson | first18=K.
| last19=Blomme | first19=R. | last20=Jean-Antoine | first20=A.
| last21=Huckle | first21=H. | last22=Smith | first22=M.
| last23=Baker | first23=S. G. | last24=Damerdji | first24=Y.
| last25=Dolding | first25=C. | last26=Frémat | first26=Y.
| last27=Gosset | first27=E. | last28=Guerrier | first28=A.
| last29=Guy | first29=L. P. | last30=Haigron | first30=R.
| display-authors=1 | journal=Astronomy and Astrophysics
| volume=616 | pages=A7 | year=2018
| bibcode=2018A&A...616A...7S | arxiv=1804.09370
| doi=10.1051/0004-6361/201832795 | s2cid=52952408 }}</ref>

<ref name=dosSantos2016>{{cite journal
| title=The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars
| display-authors=1 | last1=dos Santos | first1=Leonardo A.
| last2=Meléndez | first2=Jorge | last3=do Nascimento | first3=José-Dias
| last4=Bedell | first4=Megan | last5=Ramírez | first5=Iván
| last6=Bean | first6=Jacob L. | last7=Asplund | first7=Martin
| last8=Spina | first8=Lorenzo | last9=Dreizler | first9=Stefan
| last10=Alves-Brito | first10=Alan | last11=Casagrande | first11=Luca
| journal=Astronomy & Astrophysics | volume=592 | id=A156 | pages=8 | date=August 2016
| doi=10.1051/0004-6361/201628558 | bibcode=2016A&A...592A.156D |arxiv = 1606.06214 | s2cid=53533614 }}</ref>

<ref name="Keck">{{cite press release
| title=Astronomers discover six new planets orbiting nearby stars
| date=November 1, 1999 | publisher=W. M. Keck Observatory | location=Kamuela, Hawaii
| url=http://www.keckobservatory.org/astronomers_discover_six_new_planets_orbiting_nearby_stars/
| access-date=December 19, 2017 }}</ref>

<ref name=mnras384_1_173>{{cite journal
| last=Fuhrmann | first=Klaus
| title=Nearby stars of the Galactic disc and halo - IV
| journal=[[Monthly Notices of the Royal Astronomical Society]]
| volume=384 | issue=1 | pages=173–224 | date=February 2008
| doi=10.1111/j.1365-2966.2007.12671.x | doi-access=free
| bibcode=2008MNRAS.384..173F }}</ref>

<ref name="Raghavan2006">{{cite journal
| title=Two Suns in the Sky: Stellar Multiplicity in Exoplanet Systems
| last1=Raghavan | first1=Deepak | last2=Henry | first2=Todd J.
| last3=Mason | first3=Brian D. | last4=Subasavage | first4=John P.
| last5=Jao | first5=Wei-Chun | last6=Beaulieu | first6=Thom D.
| last7=Hambly | first7=Nigel C. | display-authors=1
| arxiv=astro-ph/0603836 | bibcode=2006ApJ...646..523R
| journal=The Astrophysical Journal
| volume=646 | issue=1 | pages=523–542 | year=2006
| doi=10.1086/504823 | s2cid=5669768 }}</ref>

<ref name="Riddle2015">{{cite journal
| title=A Survey of the High Order Multiplicity of Nearby Solar-type Binary Stars with Robo-AO
| last1=Riddle | first1=Reed L. | last2=Tokovinin | first2=Andrei
| last3=Mason | first3=Brian D. | last4=Hartkopf | first4=William I.
| last5=Roberts Jr. | first5=Lewis C. | last6=Baranec | first6=Christoph
| last7=Law | first7=Nicholas M. | last8=Bui | first8=Khanh
| last9=Burse | first9=Mahesh P. | last10=Das | first10=H. K.
| last11=Dekany | first11=Richard G. | last12=Kulkarni | first12=Shrinivas
| last13=Punnadi | first13=Sujit | last14=Ramaprakash | first14=A. N.
| last15=Tendulkar | first15=Shriharsh P. | display-authors=1
| journal=The Astrophysical Journal
| volume=799 | issue=1 | at=4 | year=2015
| arxiv=1411.0682 | bibcode=2015ApJ...799....4R
| doi=10.1088/0004-637X/799/1/4 | s2cid=5642378 }}</ref>

<ref name="Vogt2000">{{cite journal
| title=Six New Planets from the Keck Precision Velocity Survey
| last1=Vogt | first1=Steven S. | last2=Marcy | first2=Geoffrey W.
| last3=Butler | first3=R. Paul | last4=Apps | first4=Kevin
| display-authors=1 | journal=The Astrophysical Journal
| volume=536 | issue=2 | pages=902–914 | year=2000
| arxiv=astro-ph/9911506 | bibcode=2000ApJ...536..902V
| doi=10.1086/308981 | s2cid=119375519 }}</ref>

<ref name=oepc>{{cite web
| title=HD 222582
| work=Open Exoplanet Catalogue
| url=http://www.openexoplanetcatalogue.com/planet/HD%20222582%20A%20b/
| access-date=2020-12-31 }}</ref>

<ref name=exoplanets>{{cite web
| title=HD 222582 b
| work=Exoplanet Catalogue
| publisher=NASA Astrophysics Division
| url=https://exoplanets.nasa.gov/exoplanet-catalog/6845/hd-222582-b/
| access-date=2020-12-31 }}</ref>

}}

==External links==
* {{cite web | url=http://aladin.u-strasbg.fr/AladinPreview?-c=23+41+51.5299-05+59+08.726&ident=NLTT+57682&submit=Aladin+previewer | title=HD 222582 Image | work=Simbad}}
* {{cite web | url=http://aladin.u-strasbg.fr/AladinPreview?-c=23+41+51.5299-05+59+08.726&ident=NLTT+57682&submit=Aladin+previewer | title=HD 222582 Image | work=Simbad}}


{{Sky|23|41|51.5299|-|05|59|08.726|136.8}}
{{Sky|23|41|51.5299|-|05|59|08.726|136.8}}

{{Stars of Aquarius}}
{{Stars of Aquarius}}
<!-- Properties -->

{{DEFAULTSORT:HD 222582}}
[[Category:G-type main-sequence stars]]
[[Category:M-type main-sequence stars]]
[[Category:Solar twins]]
[[Category:Planetary systems with one confirmed planet]]
[[Category:Triple stars]]
<!-- Identifiers -->
[[Category:Aquarius (constellation)]]
[[Category:Aquarius (constellation)]]
[[Category:Henry Draper Catalogue objects|216770]]
[[Category:Durchmusterung objects|BD-06 6262]]
[[Category:Henry Draper Catalogue objects|222582]]
[[Category:Hipparcos objects|116906]]
[[Category:Hipparcos objects|116906]]
[[Category:Planetary systems]]
[[Category:2MASS objects|J23415154-0559086]]
[[Category:G-type stars]]

{{star-stub}}
{{main-star-stub}}

Revision as of 12:46, 9 May 2024

HD 222582
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 23h 41m 51.5301s[1]
Declination –05° 59′ 08.729″[1]
Apparent magnitude (V) 7.685±0.005[2]
Characteristics
HD 222582A
Evolutionary stage Main sequence
Spectral type G5V[3]
B−V color index 0.648±0.002[4]
HD 222582B
Spectral type M4.5V[5]
Astrometry
Radial velocity (Rv)+12.020±0.0004[6] km/s
Proper motion (μ) RA: −145.492(29) mas/yr[1]
Dec.: −111.458(21) mas/yr[1]
Parallax (π)23.7955 ± 0.0238 mas[1]
Distance137.1 ± 0.1 ly
(42.02 ± 0.04 pc)
Absolute magnitude (MV)4.44±0.12[2]
Position (relative to HD 222582A)[5]
ComponentHD 222582B
Epoch of observation2018
Angular distance109.56±0.18″
Position angle299.52±0.03°
Projected separation4637±59 AU AU
Details
A
Mass0.993±0.035[7] M☉
Radius1.137±0.017[7] R☉
Luminosity1.302+0.005
−0.004[8] L☉
Surface gravity (log g)4.370±0.009[4] cgs
Temperature5,790±3[4] K
Metallicity [Fe/H]−0.005±0.003[4] dex
Rotational velocity (v sin i)1.74±0.12[9] km/s
Age6.7±0.3[4] Gyr
Ba+Bb
Mass0.2[10] M☉
Other designations
BD−06°6262, GC 32912, HD 222582, HIP 116906, SAO 146849, WDS J23419-0559A, NLTT 57682, 2MASS J23415154-0559086[11]
Database references
SIMBADdata
Planet
HD 222582 b Data Simbad
Data ExoPlanet

HD 222582 is a multiple star system in the equatorial constellation of Aquarius. It is invisible to the naked eye with an apparent visual magnitude of 7.7,[2] but can be viewed with binoculars or a small telescope.[12] The system is located at a distance of 137 light years from the Sun based on parallax,[1] and it is drifting further away with a radial velocity of +12 km/s.[6] It is located close enough to the ecliptic that it is subject to lunar occultations.[13]

The primary member of this system, designated component A, is an ordinary G-type main-sequence star with a stellar classification of G5V.[3] The physical properties of the star are similar enough to the Sun that it is considered a candidate solar twin.[14][4] It is about 6.5[9] billion years old with an inactive chromosphere[14] and is spinning with a low projected rotational velocity of 1.7 km/s.[9] The mass[7] and metallicity[4] of this star are essentially the same as the Sun. It has a 14% larger radius and is radiating 1.3 times the luminosity of the Sun from its photosphere at an effective temperature of 5,790 K.[4]

Component B of this system is a close binary[15][16] system with the components designated HD 222582 Ba and Bb. The pair have a combined class of M4.5 V+[5] and about 20% the mass of the Sun.[10]

Planetary system

In November 1999, a dense superjovian planet was announced orbiting the primary by the California and Carnegie Planet Search. Designated component 'b', it was discovered using the radial velocity method, using 24 observations over a period of 1.5 years. The exoplanet is orbiting with a period of 1.57 years and a very large eccentricity of 0.76, ranging in distance from 0.39 AU out to 2.31 AU away from the primary.[17][18]

The HD 222582 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 8.37[19] MJ 1.35 572 0.76 — —

See also

References

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c Fuhrmann, Klaus (February 2008). "Nearby stars of the Galactic disc and halo - IV". Monthly Notices of the Royal Astronomical Society. 384 (1): 173–224. Bibcode:2008MNRAS.384..173F. doi:10.1111/j.1365-2966.2007.12671.x.
  3. ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
  4. ^ a b c d e f g h Lorenzo-Oliveira, Diego; et al. (November 2018). "The Solar Twin Planet Search. The age-chromospheric activity relation". Astronomy & Astrophysics. 619: 10. arXiv:1806.08014. Bibcode:2018A&A...619A..73L. doi:10.1051/0004-6361/201629294. S2CID 118995412. A73.
  5. ^ a b c Montes, D.; et al. (September 2018). "Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics". Monthly Notices of the Royal Astronomical Society. 479 (1): 1332–1382. arXiv:1805.05394. Bibcode:2018MNRAS.479.1332M. doi:10.1093/mnras/sty1295. S2CID 119260219.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  6. ^ a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
  7. ^ a b c Soto, M. G.; Jenkins, J. S. (July 2018). "Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES). I. Code description and dwarf stars catalogue". Astronomy & Astrophysics. 615: 28. arXiv:1801.09698. Bibcode:2018A&A...615A..76S. doi:10.1051/0004-6361/201731533. S2CID 119107228. A76.
  8. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  9. ^ a b c dos Santos, Leonardo A.; et al. (August 2016). "The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars". Astronomy & Astrophysics. 592: 8. arXiv:1606.06214. Bibcode:2016A&A...592A.156D. doi:10.1051/0004-6361/201628558. S2CID 53533614. A156.
  10. ^ a b "HD 222582". Open Exoplanet Catalogue. Retrieved 2020-12-31.
  11. ^ "HD 222582". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-31.
  12. ^ "The astronomical magnitude scale". International Comet Quarterly. Retrieved 2020-12-31.
  13. ^ Richichi, A. (January 2003). "Lunar occultations of stars with exoplanet candidates". Astronomy and Astrophysics. 397 (3): 1123–1127. Bibcode:2003A&A...397.1123R. doi:10.1051/0004-6361:20021585.
  14. ^ a b Reddy, Arumalla B. S.; Lambert, David L. (August 2017). "Solar Twins and the Barium Puzzle". The Astrophysical Journal. 845 (2): 14. arXiv:1707.07051. Bibcode:2017ApJ...845..151R. doi:10.3847/1538-4357/aa81d6. S2CID 119232784. 151.
  15. ^ Riddle, Reed L.; et al. (2015). "A Survey of the High Order Multiplicity of Nearby Solar-type Binary Stars with Robo-AO". The Astrophysical Journal. 799 (1). 4. arXiv:1411.0682. Bibcode:2015ApJ...799....4R. doi:10.1088/0004-637X/799/1/4. S2CID 5642378.
  16. ^ Raghavan, Deepak; et al. (2006). "Two Suns in the Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal. 646 (1): 523–542. arXiv:astro-ph/0603836. Bibcode:2006ApJ...646..523R. doi:10.1086/504823. S2CID 5669768.
  17. ^ "Astronomers discover six new planets orbiting nearby stars" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. November 1, 1999. Retrieved December 19, 2017.
  18. ^ Vogt, Steven S.; et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal. 536 (2): 902–914. arXiv:astro-ph/9911506. Bibcode:2000ApJ...536..902V. doi:10.1086/308981. S2CID 119375519.
  19. ^ "HD 222582 b". Exoplanet Catalogue. NASA Astrophysics Division. Retrieved 2020-12-31.


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