58 Leonis

{{Starbox begin

| name = 58 Leonis

}}

{{Starbox observe

| epoch = J2000

| constell = Leo

| ra = {{RA|11|00|33.64811}}

| dec = {{DEC|+03|37|02.9766}}

| appmag_v = 4.852

}}

{{Starbox character

| class = {{nowrap|K0.5 III Fe-0.5}}

| b-v = 1.163

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = +5.98

| prop_mo_ra = +14.82

| prop_mo_dec = −16.51

| parallax = 9.05

| p_error = 0.20

| parallax_footnote =

| absmag_v = −1.04

}}

{{Starbox detail

| source =

| mass = 1.89

| radius =

| luminosity = 182

| gravity = 1.8

| temperature = {{Val|4519|52|fmt=commas}}

| metal_fe = {{Val|−0.16|0.10}}

| rotational_velocity =

| age_gyr = 1.69

}}

{{Starbox catalog

| names = {{odlist | F=58 Leo | BD=+04°2407 | FK5=1284 | HD=95345 | HIP=53807 | HR=4291 | SAO=118610 | CCDM=J11006+0337AB }}

}}

{{Starbox reference

| Simbad = 58+Leo

}}

58 Leonis is a possible binary star system in the southern part of the constellation of Leo, near the border with Sextans. It shines with an apparent magnitude of 4.85, making it bright enough to be seen with the naked eye. An annual parallax shift of {{Val|9.05|0.20|u=mas}} yields a distance estimate of 360 light years. It is moving further from the Sun with a heliocentric radial velocity of +6 km/s.

This orange hued star is an evolved K-type giant with a stellar classification of {{nowrap|K0.5 III Fe-0.5}}, indicating a mild underabundance of iron in its spectrum. It was identified as a barium star by P. M. Williams (1971). These are theorized to be stars that show an enrichment of s-process elements by mass transfer from a now-white dwarf companion when it passed through the asymptotic giant branch stage. MacConnell et al. (1972) classified 58 Leonis as a marginal barium star. De Castro et al. (2016) consider this to be only a probable barium star, because of the low degree of s-process enrichment, and they rejected it from their sample. Rather than having an evolved companion, it may instead have formed from a cloud that was mildly enriched with s-process elements.

References

{{reflist|refs=

{{citation

| title=Validation of the new Hipparcos reduction

| last1=van Leeuwen | first1=F. | postscript=.

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | year=2007

| arxiv=0708.1752 | bibcode=2007A&A...474..653V

| doi=10.1051/0004-6361:20078357 | s2cid=18759600 }}

{{citation

| title=Abundances in five newly-discovered BA II stars

| last1=Williams | first1=P. M. | journal=The Observatory

| volume=91 | pages=37–39 | date=February 1971

| bibcode=1971Obs....91...37W | postscript=. }}

{{citation

| title=Abundances in the Local Region. I. G and K Giants

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| journal=Astronomical Journal

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| bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88

| arxiv=1507.01466 | s2cid=118505114 | postscript=. }}

{{citation

| title=Chemical abundances and kinematics of barium stars

| journal=Monthly Notices of the Royal Astronomical Society

| display-authors=1 | last1=De Castro | first1=D. B.

| last2=Pereira | first2=C. B. | last3=Roig | first3=F.

| last4=Jilinski | first4=E. | last5=Drake | first5=N. A.

| last6=Chavero | first6=C. | last7=Sales Silva | first7=J. V.

| volume=459 | issue=4 | page=4299 | year=2016

| doi=10.1093/mnras/stw815 | doi-access=free

| arxiv=1604.03031

| bibcode=2016MNRAS.459.4299D }}

{{citation

| title=The Perkins catalog of revised MK types for the cooler stars

| journal=Astrophysical Journal Supplement Series

| last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C.

| volume=71 | pages=245 | year=1989 | postscript=.

| doi=10.1086/191373 | bibcode=1989ApJS...71..245K | s2cid=123149047

}}

{{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

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

{{citation

| title=The barium stars in the Hertzsprung-Russel diagram.

| last1=Bergeat | first1=J. | last2=Knapik | first2=A.

| journal=Astronomy and Astrophysics

| volume=321 | page=L9 | date=May 1997

| bibcode=1997A&A...321L...9B | postscript=. }}

}}

External links

58 Leonis in [https://web.archive.org/web/20150302211516/http://www.astrostudio.org/constellations.php?con=Leo Hipparcos stars in Leo]

Category:K-type giants

Category:Barium stars

Category:Binary stars

Category:Leo (constellation)

Leonis, d

Category:Durchmusterung objects