HD 82205

{{Starbox begin

| name = HD 82205

}}

{{Starbox observe

| epoch = J2000.0 (ICRS)

| constell = Antlia

| ra = {{RA|09|29|54.5048}}

| dec = {{DEC|-26|35|22.6154}}

| appmag_v = 5.48{{±|0.01}}

}}

{{Starbox character

| class = K3 III

| u-b =

| b-v = +1.36

}}

{{Starbox astrometry

| radial_v = 12{{±|2}}

| parallax = 4.0447

| p_error = 0.0731

| parallax_footnote =

| prop_mo_ra = −21.883

| prop_mo_dec = +0.761

| pm_footnote =

| absmag_v = −1.42

}}

{{Starbox detail

| mass = 4.46

| radius = 38.86

| luminosity = 552

| gravity = 1.61{{±|0.01}}

| temperature = 4,413{{±|122}}

| metal_fe = +0.09

| rotational_velocity = <1

| age_myr =

}}

{{Starbox catalog

| names = {{odlist|Gould = 3 G. Antliae|HD = 82205|CD = −26°7117|GC = 13110|HR = 3770|SAO = 177546|WDS = J09299-2635A}}

}}

{{Starbox reference

| Simbad = HR+3770

}}

HD 82205 (HR 3770) is a solitary star in the southern constellation Antlia. It is faintly visible to the naked eye with an apparent magnitude of 5.48 and is estimated to be 810 light years distant based on parallax measurements. However, it is receding with a heliocentric radial velocity of {{val|12|ul=km/s}}.

HD 82205 has a general stellar classification of K3 III, indicating that it is a red giant. However, Houk and Cowley (1982) found a slightly warmer class of K2 III CNII, which also suggests a strong overabundance of cyano radicals in the stellar atmosphere. At present it has 4.46 times the mass of the Sun but has expanded to 38.9 times its girth. It shines with a luminosity of {{val|552|ul=solar luminosity}} from its enlarged photosphere at an effective temperature of {{val|4413|ul=K|fmt=commas}}, giving an orange hue. HD 82205 has a metallicity 123% that of the Sun and is believed to be a member of the thin disk population. Currently, it spins with a projected rotational velocity lower than {{val|1|ul=km/s}}.

There is a 14th magnitude optical companion separated {{val|12.4|ul=arcseconds}} away along a position angle of {{val|131|ul=deg}}. The object was first noticed by T.J.J See in 1897.

References

{{reflist||refs=

{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=March 2000 |volume=355 |pages=L27–L30 |bibcode=2000A&A...355L..27H |issn=0004-6361 }}

{{cite journal |last1=Johnson |first1=H. L. |last2=Mitchell |first2=R. I. |last3=Iriarte |first3=B. |last4=Wisniewski |first4=W. Z. |title=UBVRIJKL Photometry of the Bright Stars |journal=Communications of the Lunar and Planetary Laboratory |date=1966 |volume=4 |pages=99–110 |bibcode=1966CoLPL...4...99J}}

{{cite journal | last1 = Abt | first1 = H. A. | title = Visual multiples. VIII - 1000 MK types | journal = The Astrophysical Journal Supplement Series | date = September 1985 | volume = 59 | page = 95 | issn = 0067-0049 | eissn = 1538-4365 | doi = 10.1086/191064 | bibcode = 1985ApJS...59...95A | doi-access = free}}

{{cite journal |last1=Wilson |first1=Ralph Elmer |title=General catalogue of stellar radial velocities. |journal=Carnegie Institute Washington D.C. Publication |year=1953 |pages=0 |bibcode=1953GCRV..C......0W}}

{{cite journal | last1 = Anderson | first1 = E. | last2 = Francis | first2 = Ch. | title = XHIP: An extended hipparcos compilation | journal = Astronomy Letters | date = May 2012 | volume = 38 | issue = 5 | pages = 331–346 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 255204555 }}

{{cite journal |last1=De Medeiros |first1=J. R. |last2=Alves |first2=S. |last3=Udry |first3=S. |last4=Andersen |first4=J. |last5=Nordström |first5=B. |last6=Mayor |first6=M. |title=A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆ |journal=Astronomy & Astrophysics |date=January 2014 |volume=561 |pages=A126 |doi=10.1051/0004-6361/201220762 |issn=0004-6361 |bibcode=2014A&A...561A.126D |arxiv=1312.3474 |doi-access=free}}

{{cite journal | last1 = Eggen | first1 = Olin J. | title = Large and Kinematically Unbiased Samples of G- and K-Type Stars. III. Evolved Young Disk Stars in the Bright Star Sample | journal = Publications of the Astronomical Society of the Pacific | date = January 1989 | volume = 101 | page = 54 | issn = 0004-6280 | eissn = 1538-3873 | doi = 10.1086/132404 | bibcode = 1989PASP..101...54E | doi-access = free }}

{{cite journal |display-authors=1 |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=Lee |first6=Nathan De |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |last31=Sharma |first31=Sanjib |last32=Shiao |first32=Bernie |last33=Sozzetti |first33=Alessandro |last34=Stello |first34=Dennis |last35=Vanderspek |first35=Roland |last36=Wallace |first36=Geoff |last37=Winn |first37=Joshua N. |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=9 September 2019 |volume=158 |issue=4 |pages=138 |doi=10.3847/1538-3881/ab3467 |issn=0004-6256 |bibcode=2019AJ....158..138S |arxiv=1905.10694 |doi-access=free}}

{{cite journal |last1=McDonald |first1=I. |last2=Zijlstra |first2=A. A. |last3=Boyer |first3=M. L. |title=Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos |journal=Monthly Notices of the Royal Astronomical Society |date=21 November 2012 |volume=427 |issue=1 |pages=343–357 |doi=10.1111/j.1365-2966.2012.21873.x |issn=0035-8711 |bibcode=2012MNRAS.427..343M |arxiv=1208.2037 |doi-access=free}}

{{cite journal | last1 = Kervella | first1 = Pierre | last2 = Arenou | first2 = Frédéric | last3 = Thévenin | first3 = Frédéric | title = Stellar and substellar companions from Gaia EDR3 | journal = Astronomy & Astrophysics | year = 2022 | volume = 657 | page = A7 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/202142146 | bibcode = 2022A&A...657A...7K | arxiv = 2109.10912 | doi-access = free}}

{{cite book |last1=Houk |first1=N. | title = Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations −40° to −26° | date = 1982 | bibcode = 1982mcts.book.....H }}

{{cite journal | last1 = See | first1 = T. J. J. | title = New Double Stars in the Southern Hemisphere discovered at the Lowell Observatory | journal = Astronomische Nachrichten | date = 1897 | volume = 143 | issue = 23–24 | pages = 413–416 | language = de | issn = 0004-6337 | eissn = 1521-3994 | doi = 10.1002/asna.18971432305 | bibcode = 1897AN....143..413S}}

{{cite journal | last1 = Mason | first1 = Brian D. | last2 = Wycoff | first2 = Gary L. | last3 = Hartkopf | first3 = William I. | last4 = Douglass | first4 = Geoffrey G. | last5 = Worley | first5 = Charles E. | title = The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal = The Astronomical Journal | date = December 2001 | volume = 122 | issue = 6 | pages = 3466–3471 | issn = 0004-6256 | doi = 10.1086/323920 | bibcode = 2001AJ....122.3466M| doi-access = free}}

{{cite journal | 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 | date = 11 September 2008 | volume = 389 | issue = 2 | pages = 869–879 | issn = 0035-8711 | eissn = 1365-2966 | doi = 10.1111/j.1365-2966.2008.13596.x | bibcode = 2008MNRAS.389..869E | arxiv = 0806.2878 | doi-access = free }}

{{cite journal | last=Gould | first=Benjamin Apthorp | title=Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas | journal=Resultados del Observatorio Nacional Argentino | volume=1 | bibcode=1879RNAO....1.....G | year=1878 | page=}}

}}

External links

[http://aladin.u-strasbg.fr/AladinPreview?-c=HD++82205&ident=HD++82205&submit=Aladin+previewer Image HD 82205]

Category:Antlia

082205

Category:Double stars

Category:K-type giants