HD 72659

{{Starbox observe

| epoch = J2000.0

| constell = Hydra

| ra = {{RA|08|34|03.18984}}

| dec = {{DEC|-01|34|05.5822}}

| appmag_v = 7.46

}}

{{Starbox character

| class = G2V

| b-v = {{Val|+0.612|0.015}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|-18.29|0.12}}

| prop_mo_ra = {{val|-112.313|0.026}}

| prop_mo_dec = {{val|-96.386|0.018}}

| pm_footnote =

| parallax = 19.2582

| p_error = 0.0271

| parallax_footnote =

| absmag_v = 3.98

}}

{{Starbox detail

| source =

| mass = {{val|1.07|0.02}}

| radius = {{val|1.38|0.02}}

| luminosity = {{val|2.16|0.01}}

| gravity = {{val|4.19|0.02}}

| temperature = {{val|5956|43|fmt=commas}}

| metal_fe = {{Val|−0.04|0.01}}

| rotation =

| rotational_velocity = 5.1

| age_gyr = {{val|7.0|0.7}}

}}

{{Starbox catalog

| names = {{odlist | BD=−01°2075 | HD=72659 | HIP=42030 | SAO=136045|Gaia DR2=3073443760538892032|2MASS=J08340320-0134056}}

}}

{{Starbox reference

| Simbad = HD+72659

}}

HD 72659 is a star in the equatorial constellation of Hydra. With an apparent visual magnitude of 7.46, his yellow-hued star is too faint to be viewed with the naked eye. Parallax measurements provide a distance estimate of 169.4 light years from the Sun, and it has an absolute magnitude of 3.98. The star is drifting closer with a radial velocity of −18.3 km/s.

This is a Sun-like main sequence star with a stellar classification of G2V, indicating that it is generating energy through core hydrogen fusion. It is older than the Sun with an age of about seven billion years, and is spinning with a projected rotational velocity of 5.1 km/s. The star has 7% greater mass than the Sun and a 38% larger radius. It is radiating more than double the Sun's luminosity from its photosphere at an effective temperature of 5,956 K. The metallicity of the stellar atmosphere is similar to the Sun.

Planetary system

An extrasolar planet was discovered orbiting this star in 2003 via the Doppler method. This is a superjovian planet with an eccentric orbit, completing a lap around its host star every {{Convert|3630|days|years|disp=out|abbr=off}}. In 2022, the inclination and true mass of HD 72659 b were measured via astrometry, along with the detection of a second substellar companion, likely a brown dwarf.

{{OrbitboxPlanet begin

| table_ref =

| period_unit = year

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|2.988|2.586|0.098}}

| period = {{val|9.718|0.052|0.043}}

| semimajor = {{val|4.691|0.185|0.202}}

| eccentricity = {{val|0.257|0.014|0.016}}

| inclination = {{val|77.583|39.898|39.755}}

}}

{{OrbitboxPlanet

| exoplanet = c

| mass = {{val|18.806|4.442|4.796}}

| period = {{val|49.850|3.805|3.287}}

| semimajor = {{val|13.959|0.884|0.861}}

| eccentricity = {{val|0.091|0.055|0.048}}

| inclination = {{val|14.279|4.366|2.678}}

}}

References

{{Reflist|refs=

{{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 }}

{{cite journal

| title=Michigan catalogue of two-dimensional spectral types for the HD Stars

| last1=Houk | first1=N. | last2=Swift | first2=C.

| journal=Michigan Spectral Survey

| volume=5 | year=1999 | bibcode=1999MSS...C05....0H }}

{{cite journal

| title=Revising the ages of planet-hosting stars

| url=http://www.aanda.org/articles/aa/full_html/2015/03/aa24951-14/aa24951-14.html

| last1=Bonfanti | first1=A. | last2=Ortolani | first2=S.

| last3=Piotto | first3=G. | last4=Nascimbeni | first4=V.

| display-authors=1 | journal=Astronomy and Astrophysics

| year=2015 | volume=575 | at=A18

| arxiv=1411.4302 | bibcode=2015A&A...575A..18B

| doi=10.1051/0004-6361/201424951 | s2cid=54555839

}}

{{cite journal

| title=Seven New Keck Planets Orbiting G and K Dwarfs

| last1=Butler | first1=R. Paul | last2=Marcy | first2=Geoffrey W.

| last3=Vogt | first3=Steven S. | last4=Fischer | first4=Debra A.

| last5=Henry | first5=Gregory W. | last6=Laughlin | first6=Gregory

| last7=Wright | first7=Jason T. | display-authors=1

| journal=The Astrophysical Journal

| date=2003 | volume=582 | issue=1 | pages=455–466

| doi=10.1086/344570 | bibcode=2003ApJ...582..455B

| citeseerx=10.1.1.7.6988 | s2cid=17608922 }}

{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | title=Catalog of Nearby Exoplanets | last1=Butler | first1=R. P. | last2=Wright | first2=J. T. | last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A. | last5=Vogt | first5=S. S. | last6=Tinney | first6=C. G. | last7=Jones | first7=H. R. A. | last8=Carter | first8=B. D. | last9=Johnson | first9=J. A. | display-authors=1 | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505–522 | date=2006 | doi=10.1086/504701 | bibcode=2006ApJ...646..505B | arxiv=astro-ph/0607493 | hdl=2299/1103 | s2cid=119067572 | access-date=2009-12-23 | archive-date=2019-12-07 | archive-url=https://web.archive.org/web/20191207150418/http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | url-status=dead }}

{{cite journal

| title=Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants

| last1=Luck | first1=R. Earle

| journal=The Astronomical Journal

| bibcode=2017AJ....153...21L | arxiv=1611.02897

| doi=10.3847/1538-3881/153/1/21 | s2cid=119511744 | doi-access=free }}

{{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 }}

}}

External links

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Hydra (constellation)

Category:Durchmusterung objects

072659

042030

J08340320-0134056

HD 72659

Planetary system

See also

References

External links