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79 Ceti

{{short description|Binary star system in the constellation of Cetus}}

{{Starbox begin }}

{{Starbox observe

| epoch = J2000.0

| constell = Cetus

| ra = {{RA|02|35|19.9293}}

| dec = {{DEC|−03|33|38.1707}}

| appmag_v = +6.83

}}

{{Starbox character

| class = G2V+M or G8IV

| b-v = {{Val|0.670|0.004}}

| u-b =

| variable = none

}}

{{Starbox astrometry

| radial_v = {{Val|−50.93|0.09}}

| prop_mo_ra = {{val|−155.58}}

| prop_mo_dec = {{val|−437.99}}

| parallax = 26.4360

| p_error = 0.0580

| parallax_footnote =

| absmag_v = +3.88

}}

{{Starbox detail

| source =

|component1=79 Ceti A

|component2=79 Ceti B

| age_gyr = 6.0 or {{Val|9.4|0.8}}

| metal_fe = {{Val|+0.16|0.01}}

| mass = 1.01

|mass2 = 0.286{{citation|arxiv=1912.11019|title=Orbital Stability of Circumstellar Planets in Binary Systems|year=2020|doi=10.3847/1538-3881/ab64fa|last1=Quarles|first1=Billy|last2=Li|first2=Gongjie|last3=Kostov|first3=Veselin|last4=Haghighipour|first4=Nader|journal=The Astronomical Journal|volume=159|issue=3|page=80|bibcode=2020AJ....159...80Q |s2cid=209444271 |doi-access=free }}

| radius = 1.48

| rotational_velocity =

| luminosity = {{Val|1.99|0.04}}

| gravity = {{Val|4.19|0.02}}

| temperature = {{Val|5806|17|fmt=commas}}

}}

{{Starbox catalog

| names = {{odlist | F=79 Cet | BD=−04°426 | FK5=4237 | GJ=9085 | HD=16141 | HIP=12048 | HR= | SAO=129992 | WDS=J02353-0334A|Gaia DR2=2495335115182966016|2MASS=J02351994-0333376}}

}}

{{Starbox reference

|Simbad=79+Cet

}}

{{Starbox end}}

79 Ceti, also known as HD 16141, is a binary star system located 123 light-years from the Sun in the southern constellation of Cetus. It has an apparent visual magnitude of +6.83, which puts it below the normal limit for visibility with the average naked eye. The star is drifting closer to the Earth with a heliocentric radial velocity of −51 km/s.

Harlan (1974) assigned this star a stellar classification of G2V, matching an ordinary G-type main-sequence star that is undergoing core hydrogen fusion. However, Houk and Swift (1999) found a class of G8IV, which suggests it has exhausted the supply of hydrogen at its core and begun to evolve off the main sequence. Eventually the outer layers of the star will expand and cool and the star will become a red giant. Estimates of the star's age range from 6.0 to 9.4 billion years old. It has an estimated 1.06 times the mass of the Sun and 1.48 times the Sun's radius. The star is radiating twice luminosity of the Sun from its photosphere at an effective temperature of 5,806 K. The discrepancy was later found to be due to an additional red dwarf star in the system at a projected separation 220 AUs.

Planetary system

On March 29, 2000, a planet orbiting primary star was announced, it was discovered using the radial velocity method. This object has a minimum 0.26 times the mass of Jupiter and is orbiting its host star every 75.5 days.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = ≥0.260 ± 0.028

| period = 75.523 ± 0.055

| semimajor = 0.363 ± 0.021

| eccentricity = 0.252 ± 0.052

}}

{{Orbitbox end}}

See also

References

{{reflist|refs=

{{cite simbad | title=79 Cet | access-date=19 August 2017 }}

{{cite journal

| title=Higher depletion of lithium in planet host stars: no age and mass effect

| last1=Sousa | first1=S. G. | last2=Fernandes | first2=J.

| last3=Israelian | first3=G. | last4=Santos | first4=N. C.

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

| volume=512 | page=L5 |date=March 2010

| bibcode=2010A&A...512L...5S | arxiv=1003.0405

| doi=10.1051/0004-6361/201014125 | s2cid=118646949 }}

{{cite journal

| title=Catalog of Nearby Exoplanets

| last1=Butler | first1=J. T. | last2=Wright | first2=R. P.

| 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 | year=2006

| arxiv=astro-ph/0607493 | bibcode=2006ApJ...646..505B

| doi=10.1086/504701 | s2cid=119067572 }}

{{Cite Gaia DR2|2495335115182966016}}

{{cite journal

| title=Sub-Saturn Planetary Candidates of HD 16141 and HD 46375

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

| last3=Vogt | first3=Steven S. | display-authors=1

| journal=The Astrophysical Journal Letters

| volume=536 | issue=1 | pages=L43–L46 | year=2000

| arxiv=astro-ph/0004326 | bibcode=2000ApJ...536L..43M

| doi=10.1086/312723 | pmid=10849416 | s2cid=119530785 }}

{{cite journal

| title=MK classification for F- and G-type stars. III.

| last1=Harlan | first1=E. A.

| journal=Astronomical Journal

| volume=79 | pages=682–686 | date=June 1974

| doi=10.1086/111597 | bibcode=1974AJ.....79..682H }}

{{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=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

| first1=Sousa | last1=S. G. | display-authors=1

| last2=Santos | first2=N. C. | last3=Mayor | first3=M.

| last4=Udry | first4=S. | last5=Casagrande | first5=L.

| last6=Israelian | first6=G. | last7=Pepe | first7=F.

| last8=Queloz | first8=D. | last9=Monteiro | first9=M. J. P. F. G.

| title=Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes

| journal=Astronomy and Astrophysics

| volume=487 | issue=1 | date=August 2008 | pages=373–381

| bibcode=2008A&A...487..373S | arxiv=0805.4826

| doi=10.1051/0004-6361:200809698 | s2cid=18173201 }}

{{cite journal

| title=Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes

| display-authors=1 | last1=Stassun | first1=Keivan G.

| last2=Collins | first2=Karen A. | last3=Gaudi | first3=B. Scott

| journal=The Astronomical Journal

| volume=153 | issue=3 | id=136 | pages=20 | date=March 2017

| doi=10.3847/1538-3881/aa5df3 | arxiv=1609.04389

| bibcode=2017AJ....153..136S | s2cid=119219062 | doi-access=free }}

{{cite press release | title=Keck astronomers discover planets smaller than saturn | date=March 29, 2000 | publisher=W. M. Keck Observatory | location=Kamuela, Hawaii | url=http://www.keckobservatory.org/keck_astronomers_discover_planets_smaller_than_saturn/ | access-date=August 13, 2019 }}

}}

External links

  • [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=79+Ceti&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2006&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0 SIMBAD: HD 16141 -- High proper-motion Star]
  • [http://www.solstation.com/stars2/79ceti.htm SolStation: 79 Ceti]
  • [https://web.archive.org/web/20070702185710/http://exoplanet.eu/star.php?st=HD+16141 Extrasolar Planets Encyclopaedia: HD 16141]

{{Sky|02|35|19.9283|-|03|33|38.167|117.1}}

{{Stars of Cetus}}

{{DEFAULTSORT:79 Ceti}}

Category:G-type subgiants

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Cetus

Category:Durchmusterung objects

Ceti, 79

9085

016141

012048

J02351994-0333376