20 Ceti

{{Starbox begin

| title = 20 Ceti

}}

{{Starbox observe

| epoch = J2000

| constell = Cetus

| ra = {{RA|00|53|00.49452}}

| dec = {{DEC|−01|08|39.3317}}

| appmag_v = 4.76

}}

{{Starbox character

| trype = red giant branch

| class = K5 III

| b-v = +1.56

| u-b = +1.91

}}

{{Starbox astrometry

| radial_v = {{Val|+16.22|0.28}}

| prop_mo_ra = +6.99

| prop_mo_dec = −15.66

| parallax = 5.56

| p_error = 0.22

| parallax_footnote =

| absmag_v = −1.58

}}

{{Starbox detail

| mass = 1.1

| radius = {{Val|65.93|+2.13|-2.25}}

| luminosity = {{Val|754.8|52.6|fmt=commas}}

| gravity = 1.61

| temperature = 4,065

| metal_fe = −0.19

}}

{{Starbox catalog

|names = {{odlist | BD=-01°114 | FK5=1022 | HD=5112 | HIP=4147 | HR=248 | SAO=129009 }}

}}

{{Starbox reference

| Simbad = 20+Cet

}}

20 Ceti is a single star located around 590 light years away in the equatorial constellation of Cetus. It is faintly visible to the naked eye with apparent magnitude is 4.76. The Bright Star Catalogue has this star classified as M0III, matching an aging red giant star that has consumed the hydrogen at its core and expanded. Houk and Swift (1999) listed an earlier class of K5 III. It has around 66 times the Sun's radius and is radiating about 750 times the Sun's luminosity from its enlarged photosphere at an effective temperature of {{val|fmt=commas|4065|ul=K}}.

References

{{reflist|refs=

{{cite journal |bibcode=2024A&A...691A..98K |title=Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost |last1=Khalatyan |first1=A. |last2=Anders |first2=F. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. A. |last5=Nepal |first5=S. |last6=Dal Ponte |first6=M. |last7=Jordi |first7=C. |last8=Guiglion |first8=G. |last9=Valentini |first9=M. |last10=Torralba Elipe |first10=G. |last11=Steinmetz |first11=M. |last12=Pantaleoni-González |first12=M. |last13=Malhotra |first13=S. |last14=Jiménez-Arranz |first14=Ó. |last15=Enke |first15=H. |last16=Casamiquela |first16=L. |last17=Ardèvol |first17=J. |journal=Astronomy and Astrophysics |date=2024 |volume=691 |pages=A98 |doi=10.1051/0004-6361/202451427 |arxiv=2407.06963 }}

{{citation

| first1=D. | last1=Hoffleit | first2=W. H. | last2=Warren, Jr.

| title=The Bright Star Catalogue

| edition=5th Revised | year=1991

| location=New Haven

| publisher=Yale University Observatory

| bibcode=1991bsc..book.....H | postscript=. }}

{{citation

| title=Validation of the new Hipparcos reduction

| 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 | postscript=. }}

{{citation

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

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

| journal=Michigan Spectral Survey | postscript=.

| location=Ann Arbor, Michigan

| publisher=Department of Astronomy, University of Michigan

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

{{citation

| title=Infrared excess around nearby red giant branch stars and Reimers law

| last1=Groenewegen | first1=M. A. T.

| journal=Astronomy & Astrophysics | postscript=.

| volume=540 | id=A32 | pages=21 | date=April 2012

| doi=10.1051/0004-6361/201118287 | bibcode=2012A&A...540A..32G | doi-access=free }}

{{citation

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E

| arxiv=0806.2878 | s2cid=14878976 | postscript=. }}

{{citation

| title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system

| journal=CDS/ADC Collection of Electronic Catalogues

| last1=Ducati | first1=J. R.

| volume=2237 | year=2002 | postscript=.

| bibcode=2002yCat.2237....0D }}

{{citation | postscript=.

| last1=Mermilliod | first1=J.-C.

| title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)

| journal=Catalogue of Eggen's UBV Data | url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1

| date=1986 | bibcode= 1986EgUBV........0M }}

{{citation

| last1=Famaey | first1=B. | last2=Pourbaix | first2=D.

| last3=Frankowski | first3=A. | last4=Van Eck | first4=S.

| last5=Mayor | first5=M. | last6=Udry | first6=S.

| last7=Jorissen | first7=A. | postscript=.

| title=Spectroscopic binaries among Hipparcos M giants

| journal=Astronomy and Astrophysics

| volume=498 | issue=2 | pages=627 | year=2009

| bibcode=2009A&A...498..627F | arxiv=0901.0934

| doi=10.1051/0004-6361/200810698 | s2cid=18739721 }}

{{cite journal

| doi=10.3847/1538-3881/ac2431

| title=Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer | year=2021

| last1=Baines | first1=Ellyn K. | last2=Thomas Armstrong | first2=J. | last3=Clark | first3=James H. | last4=Gorney | first4=Jim | last5=Hutter | first5=Donald J. | last6=Jorgensen | first6=Anders M. | last7=Kyte | first7=Casey | last8=Mozurkewich | first8=David | last9=Nisley | first9=Ishara | last10=Sanborn | first10=Jason | last11=Schmitt | first11=Henrique R. | last12=Van Belle | first12=Gerard T. | journal=The Astronomical Journal | volume=162 | issue=5 | page=198 | arxiv=2211.09030 | bibcode=2021AJ....162..198B | s2cid=238998021 | doi-access=free }}

}}

Category:M-type giants

Category:Cetus

Category:Durchmusterung objects