HD 179079

{{Starbox observe

| epoch = J2000.0

| constell = Aquila

| ra = {{RA|19|11|09.82858}}

| dec = {{DEC|−02|38|18.1881}}

| appmag_v = 7.95

}}

{{Starbox character

| type = subgiant

| class = G5IV

| appmag_1_passband = B

| appmag_1 = 8.694

| appmag_2_passband = J

| appmag_2 = {{val|6.734|0.021}}

| appmag_3_passband = H

| appmag_3 = {{val|6.402|0.031}}

| appmag_4_passband = K

| appmag_4 = {{val|6.311|0.026}}

| b-v = {{val|0.744|0.013}}

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|19.73|0.20}}

| prop_mo_ra = −134.355

| prop_mo_dec = −89.378

| parallax = 14.3191

| p_error = 0.0253

| parallax_footnote =

| absmag_v = 3.87

}}

{{Starbox detail

| mass = {{val|1.25|0.09}}

| radius = {{val|1.792|0.016}}

| temperature = {{val|5672|14|fmt=commas}}

| luminosity = {{val|2.41|0.27}}

| metal_fe = {{val|0.19|0.03}}

| gravity = {{val|4.11|0.04}}

| age_gyr = {{val|7.88|0.65}}

| rotational_velocity = {{val|1.00|0.52}}

}}

{{Starbox catalog

| names = {{odlist | BD=−02 4881 | HD=179079 | HIP=94256 | PPM=202620 | SAO=143111 }}

}}

{{Starbox reference

| Simbad = HD+179079

| NSTED = HD+179079

| EPE = HD+179079

}}

HD 179079 is a star with an exoplanetary companion in the equatorial constellation of Aquila. It has an apparent visual magnitude of approximately 7.96, making it too faint to be readily visible to the naked eye. The distance to this star can be determine using parallax measurements, which yields an estimate of 228 light years. It is drifting further away with a radial velocity of {{val|+20|u=km/s}}.

This is an evolved G-type subgiant star with a stellar classification of G5IV. It is nearly 7–8 billion years old and is chromospherically inactive with a projected rotational velocity of 1 km/s. The evolutionary track for this star implies a mass slightly higher than the Sun. It is larger in radius than the Sun and has a higher metallicity; the abundance of elements in the star's atmosphere with higher atomic numbers than hydrogen and helium. HD 179079 is radiating about 2.3 times the luminosity of the Sun from its photosphere at an effective temperature of 5,672 K.

Planetary system

An exoplanet, HD 179079 b, was announced in August 2009 to be orbiting this star. The planet was detected by the radial velocity method, using the HIRES spectrometer at Keck Observatory.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|0.076|0.012|p=≥}}

| semimajor = {{val|0.1214|0.0064|0.0071}}

| period = {{val|14.4808|0.01|0.0035}}

| eccentricity = {{val|0.049|0.087}}

}}

References

{{reflist|refs=

{{SIMBAD link|HD+179079|HIP 94256 -- Star}}, database entry, SIMBAD. Accessed on line September 2, 2009.

{{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=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=Two Exoplanets Discovered at Keck Observatory

| last1=Valenti | first1=Jeff A. | last2=Fischer | first2=Debra

| last3=Marcy | first3=Geoffrey W. | last4=Johnson | first4=John A.

| last5=Henry | first5=Gregory W. | last6=Wright | first6=Jason T.

| last7=Howard | first7=Andrew W. | last8=Giguere | first8=Matt

| last9=Isaacson | first9=Howard | display-authors=1

| journal=The Astrophysical Journal

| volume=702 | issue=2 | pages=989–997 | year=2009

| arxiv=0908.1612 | bibcode=2009ApJ...702..989V

| doi=10.1088/0004-637X/702/2/989 | s2cid=16707072 }}

{{cite journal

| title=Orbital Refinement and Stellar Properties for the HD 9446, HD 43691, and HD 179079 Planetary Systems

| last1=Hill | first1=Michelle L. | last2=Mocnik | first2=Teo

| last3=Kane | first3=Stephen R. | last4=Henry | first4=Gregory W.

| last5=Pepper | first5=Joshua | last6=Hinkel | first6=Natalie R.

| last7=Dalba | first7=Paul A. | last8=Fulton | first8=Benjamin J.

| last9=Stassun | first9=Keivan G. | last10=Rosenthal | first10=Lee J.

| last11=Howard | first11=Andrew W. | last12=Howell | first12=Steve B.

| last13=Everett | first13=Mark E. | last14=Boyajian | first14=Tabetha S.

| last15=Fischer | first15=Debra A. | last16=Rodriguez | first16=Joseph E.

| last17=Beatty | first17=Thomas G. | last18=James | first18=David J.

| display-authors=1 | journal=The Astronomical Journal

| year=2020 | volume=159 | issue=5 | page=197

| doi=10.3847/1538-3881/ab7d33 | arxiv=2003.02385

| bibcode=2020AJ....159..197H | s2cid=212414679 | doi-access=free }}

{{cite journal

| title=Stellar parameters and chemical abundances of 223 evolved stars with and without planets

| last1=Jofré | first1=E. | last2=Petrucci | first2=R.

| last3=Saffe | first3=C. | last4=Saker | first4=L.

| last5=Artur de la Villarmois | first5=E. | last6=Chavero | first6=C.

| last7=Gómez | first7=M. | last8=Mauas | first8=P. J. D.

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

| volume=574 | pages=A50 | year=2015

| arxiv=1410.6422 | bibcode=2015A&A...574A..50J

| doi=10.1051/0004-6361/201424474 | s2cid=53666931 }}

}}

Category:G-type subgiants

Category:Planetary systems with one confirmed planet

Category:Aquila (constellation)

Category:Durchmusterung objects

179079

094256

HD 179079

Planetary system

See also

References