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94 Ceti

{{Short description|Trinary star system in the constellation Cetus}}

{{Use dmy dates|date=September 2019}}

{{Starbox begin

| name = 94 Ceti A / B

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cetus

| ra = {{RA|03|12|46.43719}}

| dec = {{DEC|-01|11|45.9613}}

| appmag_v = +5.070{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}

}}

{{Starbox character

| class = F8V / M3V / M

| b-v = +0.56{{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|date=1986|bibcode= 1986EgUBV........0M}}

| u-b = +0.09

| variable =

}}

{{Starbox astrometry

| radial_v = +18.96 ± 0.08{{cite journal|author=Nidever, David L.|display-authors=etal|date=2013|title=Radial Velocities for 889 Late-Type Stars|journal=The Astrophysical Journal Supplement Series|volume=141|issue=2|pages=503–522|bibcode=2002ApJS..141..503N|doi=10.1086/340570|arxiv=astro-ph/0112477|s2cid=51814894}}

| prop_mo_ra = {{nowrap|194.56}}

| prop_mo_dec = {{nowrap|−69.01}}

| parallax = 44.29

| p_error = 0.28

| parallax_footnote =

| absmag_v = 3.32

}}

{{Starbox orbit

| reference =

| primary = 94 Ceti A

| name = 94 Ceti BC

| period = {{val|2029|41}}

| axis_unitless = {{val|220|5}} AU

| eccentricity = {{val|0.26|0.01}}

| inclination = {{val|104|2}}

| node = {{val|97|2}}

| periarg = {{val|342|7}}

}}

{{Starbox orbit

| reference =

| primary = 94 Ceti B

| name = 94 Ceti C

| period_unitless = {{val|378.35|0.36|0.34|u=days}}

| axis_unitless = {{val|0.984|0.007}} AU

| eccentricity = {{val|0.360|0.005}}

| inclination = {{val|108.323|0.581|0.561}}

| node = {{val|191.496|1.602|1.562}}

| periarg = {{val|334.895|0.240}}

| periastron = MJD {{val|55113.904|0.220}}

}}

{{Starbox detail

| age_gyr = 4.8

| metal_fe = {{nowrap|1.15 ± 0.07}}

| mass = 1.30

| radius = {{nowrap|1.898 ± 0.070}}

| gravity = {{nowrap|3.98 ± 0.10}}

| rotational_velocity = {{nowrap|8.4 ± 0.8}}

| luminosity = 4.02 ± 0.05

| temperature = {{nowrap|6,055 ± 10.0}}

| rotation = {{val|12.2|ul=d}}{{cite journal | url=http://www.aanda.org/articles/aa/full/2004/07/aa0250/aa0250.html | title=The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE | last1=Mayor | first1=M. | last2=Udry | first2=S. | last3=Naef | first3=D. | last4=Pepe | first4=F. | last5=Queloz | first5=D. | last6=Santos | first6=N. C. | last7=Burnet | first7=M. | display-authors=1 | journal=Astronomy and Astrophysics | volume=415 | issue=1 | pages=391–402 | year=2004 | arxiv=astro-ph/0310316 | bibcode=2004A&A...415..391M | doi=10.1051/0004-6361:20034250 | s2cid=5233877 }}

}}

{{Starbox catalog

| names = BD−01°457, FK5 116, GJ 128, HD 19994, HIP 14954, HR 962, LTT 1515, SAO 130355

}}

{{Starbox reference

| Simbad = 94+Cet

| EPE = HD+19994

}}

{{Starbox end}}

94 Ceti (HD 19994) is a trinary star system approximately 73 light-years away in the constellation Cetus.

94 Ceti A is a yellow-white dwarf star with about 1.3 times the mass of the Sun while 94 Ceti B and C are red dwarf stars.

An infrared excess has been detected around the primary, most likely indicating the presence of a circumstellar disk at a radius of 95 AU. The temperature of this dust is 40 K.

Stellar system

This system is a hierarchical triple star system with 94 Ceti A being orbited by 94 Ceti BC, a pair of M dwarfs, in 2000 years. 94 Ceti B and C meanwhile orbit each other in a 1-year orbit.

Planetary system

On 7 August 2000, a planet was announced by the Geneva Extrasolar Planet Search team as a result of radial velocity measurements taken with the Swiss 1.2-metre Leonhard Euler Telescope at La Silla Observatory in Chile. It is most stable if its inclination is either 65 or 115, ± 3.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = 1.855 ± 0.045

| semimajor = 1.427

| period = 535.7 ± 3.1

| eccentricity = 0.30 ± 0.04

}}

{{Orbitbox end}}

See also

References

{{Reflist|refs=

{{Cite journal | last1=Fuhrmann | first1=K. | date=2008 | 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 | bibcode=2008MNRAS.384..173F | doi=10.1111/j.1365-2966.2007.12671.x| doi-access=free }}

{{cite journal | last1=Kovtyukh |first1=V. V. | last2=Soubiran | first2=C. | last3=Belik | first3=S. I. | last4=Gorlova | first4=N. I. |date=2003 | title=High precision effective temperatures for 181 F-K dwarfs from line-depth ratios | url=http://www.aanda.org/articles/aa/full/2003/46/aa3944/aa3944.html | journal=Astronomy and Astrophysics | volume=411 | issue=3 | pages=559–564 | arxiv=astro-ph/0308429 | bibcode=2003A&A...411..559K | doi=10.1051/0004-6361:20031378|s2cid=18478960 }}

{{cite journal

| display-authors=1

| last1=Eiroa | first1=C.

| last2=Marshall | first2=J. P.

| last3=Mora | first3=A.

| last4=Montesinos | first4=B.

| last5=Absil | first5=O.

| last6=Augereau | first6=J. Ch.

| last7=Bayo | first7=A.

| last8=Bryden | first8=G.

| last9=Danchi | first9=W.

| last10=del Burgo | first10=C.

| last11=Ertel | first11=S.

| last12=Fridlund | first12=M.

| last13=Heras | first13=A. M.

| last14=Krivov | first14=A. V.

| last15=Launhardt | first15=R.

| last16=Liseau | first16=R.

| last17=Löhne | first17=T.

| last18=Maldonado | first18=J.

| last19=Pilbratt | first19=G. L.

| last20=Roberge | first20=A.

| last21=Rodmann | first21=J.

| last22=Sanz-Forcada | first22=J.

| last23=Solano | first23=E.

| last24=Stapelfeldt | first24=K.

| last25=Thébault | first25=P.

| last26=Wolf | first26=S.

| last27=Ardila | first27=D.

| last28=Arévalo | first28=M.

| last29=Beichmann | first29=C.

| last30=Faramaz | first30=V.

| last31=González-García | first31=B. M.

| last32=Gutiérrez | first32=R.

| last33=Lebreton | first33=J.

| last34=Martínez-Arnáiz | first34=R.

| last35=Meeus | first35=G.

| last36=Montes | first36=D.

| last37=Olofsson | first37=G.

| last38=Su | first38=K. Y. L.

| last39=White | first39=G. J.

| last40=Barrado | first40=D.

| last41=Fukagawa | first41=M.

| last42=Grün | first42=E.

| last43=Kamp | first43=I.

| last44=Lorente | first44=R.

| last45=Morbidelli | first45=A.

| last46=Müller | first46=S.

| last47=Mutschke | first47=H.

| last48=Nakagawa | first48=T.

| last49=Ribas | first49=I.

| last50=Walker | first50=H.

| title=DUst around NEarby Stars. The survey observational results

| journal=Astronomy & Astrophysics

| volume=555 | page=A11 | date=July 2013

| doi=10.1051/0004-6361/201321050 | bibcode=2013A&A...555A..11E | arxiv=1305.0155

| s2cid=377244 }}

{{citation

| display-authors=1

| last1=Boyajian | first1=Tabetha S. | last2=von Braun | first2=Kaspar

| last3=van Belle | first3=Gerard | last4=Farrington | first4=Chris

| last5=Schaefer | first5=Gail | last6=Jones | first6=Jeremy

| last7=White | first7=Russel | last8=McAlister | first8=Harold A.

| last9=ten Brummelaar | first9=Theo A. | last10=Ridgway | first10=Stephen

| last11=Gies | first11=Douglas | last12=Sturmann | first12=Laszlo

| last13=Sturmann | first13=Judit | last14=Turner | first14=Nils H.

| last15=Goldfinger | first15=P. J. | last16=Vargas | first16=Norm

| title=Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations

| journal=The Astrophysical Journal | volume=771 | issue=1

| id=40 | pages=31 | date=July 2013

| arxiv=1306.2974 | doi=10.1088/0004-637X/771/1/40

| bibcode=2013ApJ...771...40B | s2cid=14911430 | postscript=.

}} See Table 3.

{{cite journal |last1=van Belle |first1=G. T. |last2=von Brau |first2=K. | date=2009 | title=Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars | journal=The Astrophysical Journal | volume=694 | issue=2 | pages=1085–1098 | arxiv=0901.1206 | bibcode=2009ApJ...694.1085V | doi=10.1088/0004-637X/694/2/1085|s2cid=18370219 }}

{{cite journal | title=Analysis of the motion of an extrasolar planet in a binary system | last1=Plávalová | first1=Eva |last2=Solovaya | first2=Nina A. | journal=The Astronomical Journal | volume=146 | issue=5 | pages=108 | year=2013 | arxiv=1212.3843 | bibcode=2013AJ....146..108P | doi=10.1088/0004-6256/146/5/108 | s2cid=118629538 }}

{{cite thesis | title=Astrometric search for extrasolar planets in stellar multiple systems | url=https://d-nb.info/1016683294/34 | type=PhD | last=Röll | first=Tristan Alexander | date=2011 | publisher=Friedrich-Schiller-University Jena }}

{{cite web | title=European Southern Observatory: Six Extrasolar Planets Discovered | url=http://www.spaceref.com/news/viewpr.html?pid=2365 | date=7 August 2000 | work=SpaceRef.com | access-date=2 August 2009 }}

{{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 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |s2cid = 18759600}} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=14917 Vizier catalog entry ]

{{cite journal | title=94 Ceti: A triple star with a planet and dust disc | last1=Wiegert | first1=J. | last2=Faramaz | first2=V. | last3=Cruz-Saenz De Miera | first3=F. | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society | volume=462 | issue=2 | pages=1735–1748 | year=2016 | arxiv=1607.03038 | bibcode=2016MNRAS.462.1735W | doi=10.1093/mnras/stw1682 | doi-access=free | s2cid=55234970 }}

}}

External links

  • [http://www.solstation.com/stars2/94ceti2.htm SolStation: 94 Ceti 2] + [http://www.solstation.com/orbits/94cetsys.htm orbits]
  • [https://web.archive.org/web/20060716023258/http://www.astro.uiuc.edu/~kaler/sow/94cet.html 94 Ceti] by Professor Jim Kaler.

{{Clear}}

{{Sky|03|12|46.4365|-|01|11|45.964|73}}

{{Stars of Cetus}}

{{DEFAULTSORT:94 Ceti}}

Category:Cetus

Category:F-type main-sequence stars

Category:M-type main-sequence stars

Category:Binary stars

Ceti, 94

019994

014954

0962

Category:Durchmusterung objects

0128

Category:Planetary systems with one confirmed planet