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HD 43691

{{Short description|Star in the constellation Auriga}}

{{starbox begin

| name = HD 43691

}}

{{starbox observe

| epoch = J2000

| constell = Auriga

| ra = {{RA|06|19|34.676}}

| dec = {{DEC|+41|05|32.30}}

| appmag_v = 8.03

}}

{{starbox character

| type = subgiant

| class = G0 IV

| r-i =

| v-r =

| b-v = 0.596{{±|0.015}}

| u-b =

| variable = None

}}

{{starbox astrometry

| radial_v = −28.97{{±|0.02}}

| prop_mo_ra = 22.684

| prop_mo_dec = −53.140

| pm_footnote =

| parallax = 11.6726

| p_error = 0.0346

| parallax_footnote =

| absmag_v = 3.52

}}

{{starbox detail

| mass = 1.32{{±|0.09}}

| radius = 1.704{{±|0.023}}

| luminosity = 2.24{{±|0.02}}

| gravity = 4.19{{±|0.02}}

| temperature = 5,920{{±|34}}

| metal_fe = 0.32{{±|0.03}}

| rotational_velocity = 4.7

| age_gyr = 3.1{{±|2.5}}

}}

{{starbox catalog

| names = {{odlist | BD=+41°1415 | HD=43691 | HIP=30057 | SAO=41025 | GSC=02930-02105 | 2MASS=J06193467+4105321 | TYC=2930-2105-1 | PPM=48960 }}

}}

{{starbox reference

| Simbad = HD+43691

}}

{{starbox end}}

HD 43691 is a star with an orbiting exoplanet in the constellation Auriga. With an apparent visual magnitude of 8.03, it is too faint to be visible to the naked eye. This system is located at a distance of 279 light years based on parallax measurements, but is drifting closer with a heliocentric radial velocity of −29 km/s.

This is a slightly evolved G-type subgiant star with a stellar classification of G0 IV. It is ceasing thermonuclear fusion of hydrogen in its core and will expand to become a red giant. The star has 32% greater mass than the Sun and has a 70% larger girth. It is radiating 2.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,920 K. The level of chromospheric activity is minimal, allowing for accurate measurement of radial velocity variation.

Planetary system

In July 2007, the star is found to have a super-jovian exoplanet in orbit around it. It has minimum mass two and a half times that of Jupiter and orbits the star closer than Mercury to the Sun.

{{orbitbox planet begin

| table_ref =

}}

{{orbitbox planet

| exoplanet = b

| mass = {{val|2.57|0.31|0.34|p=≥}}

| semimajor = {{val|0.238|0.014|0.016}}

| period = {{val|36.99913|0.00095|0.00092}}

| eccentricity = {{val|0.085|0.012|0.011}}

}}

{{orbitbox end}}

See also

References

{{reflist|refs=

{{Cite XHIP|30057}}

{{cite simbad

| title=HD 43691 | access-date=2023-12-16 }}

{{cite Gaia DR3|959971546241608576}}

{{cite journal

| title=Revising the ages of planet-hosting stars

| 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=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=ELODIE metallicity-biased search for transiting Hot Jupiters IV. Intermediate period planets orbiting the stars HD 43691 and HD 132406

| last1=da Silva | first1=Ronaldo | last2=Udry | first2=Stéphane

| last3=Bouchy | first3=François | last4=Moutou | first4=Claire

| last5=Mayor | first5=Michel | last6=Beuzit | first6=Jean-Luc

| last7=Bonfils | first7=Xavier | last8=Delfosse | first8=Xavier

| last9=Desort | first9=Morgan | last10=Forveille | first10=Thierry

| last11=Galland | first11=Franck | last12=Hébrard | first12=Guillaume

| last13=Lagrange | first13=Anne-Marie | last14=Loeillet | first14=Benoit

| last15=Lovis | first15=Christophe | last16=Pepe | first16=Francesco

| last17=Perrier | first17=Christian | last18=Pont | first18=Frédéric

| last19=Queloz | first19=Didier | last20=Santos | first20=Nuno C.

| last21=Ségransan | first21=Damien | last22=Sivan | first22=Jean-Pierre

| last23=Vidal-Madjar | first23=Alfred | last24=Zucker | first24=Shay

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

| date=October 2007 | volume=473 | issue=1 | pages=323–328

| bibcode=2007A&A...473..323D | arxiv=0707.0958

| doi=10.1051/0004-6361:20077314

| s2cid=18805775 }}

{{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 | bibcode=2020AJ....159..197H

| arxiv=2003.02385 | s2cid=212414679 | doi-access=free }}

}}

{{Sky|06|19|34.6771|+|41|05|32.302|304}}

{{Stars of Auriga}}

{{DEFAULTSORT:HD 43691}}

Category:G-type main-sequence stars

Category:G-type subgiants

Category:Planetary systems with one confirmed planet

Category:Auriga

Category:Durchmusterung objects

043691

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