Epsilon Sextantis

{{Starbox begin

| name = ε Sextantis

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Sextans

| ra = {{RA|10|17|37.80200}}

| dec = {{DEC|−08|04|08.0898}}

| appmag_v = 5.24

}}

{{Starbox character

| class = F0 IV

| b-v = +0.32

| u-b = +0.09

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = +15.2

| prop_mo_ra = −160.57

| prop_mo_dec = +2.91

| parallax = 16.86

| p_error = 0.28

| parallax_footnote =

| absmag_v = 2.42

}}

{{Starbox detail

| mass = 1.94

| radius = {{Val|3.14|0.18|0.30}}

| luminosity = {{Val|23.24|0.55}}

| temperature = {{Val|7166|88|fmt=commas}}

| gravity = {{Val|3.83|0.08}}

| metal_fe = {{Val|+0.31|0.05}}

| rotational_velocity = {{Val|63.5|3.2}}

| age_gyr = 1.1

}}

{{Starbox catalog

| names = {{odlist | B=ε Sex | F=22 Sextantis | BD=−07°3001 | FK5=1263 | HD=89254 | HIP=50414 | HR=4042 | SAO=137469 }}

}}

{{Starbox reference

| Simbad = eps+Sex

}}

Epsilon Sextantis, Latinized from ε Sextantis, is a solitary, yellow-white hued star in the equatorial constellation of Sextans. With an apparent visual magnitude of 5.24, it is faintly visible to the naked eye on a dark night. The distance to this star, based upon an annual parallax shift of 16.86 mas, is about 193 light years. It is drifting further away from the Sun with a radial velocity of +15 km/s.

This is an F-type subgiant star with a stellar classification of F0 IV. However, Malaroda (1975) gave a classification of F2 III, which would indicate a more evolved giant star. It is estimated to have nearly double the mass of the Sun with 3.1 times the Sun's radius. The star is around 1.1 billion years old and has a projected rotational velocity of 63.5 km/s. It is radiating 23 times the luminosity of the Sun from its photosphere at an effective temperature of 7,166 K.

References

{{reflist|refs=

{{citation | postscript=. | last=Wilson | first=Ralph Elmer | date=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W}}

{{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 | last=Malaroda | first=S. | title=Study of the F-type stars. I. MK spectral types | journal=Astronomical Journal | postscript=. | volume=80 | pages=637–641 |date=August 1975 | doi=10.1086/111786 | bibcode=1975AJ.....80..637M| 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 | display-authors=1 | arxiv=0806.2878 | s2cid=14878976 | postscript=.}}

{{citation | last1=Reiners | first1=Ansgar | title=Rotation- and temperature-dependence of stellar latitudinal differential rotation | journal=Astronomy and Astrophysics | volume=446 | issue=1 |date=January 2006 | pages=267–277 | doi=10.1051/0004-6361:20053911 | bibcode=2006A&A...446..267R |arxiv = astro-ph/0509399 | s2cid=8642707 }}

{{citation | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | s2cid=33401607 | postscript=.}}

{{citation | display-authors=1 | last1=Prugniel | first1=Ph. | last2=Vauglin | first2=I. | last3=Koleva | first3=M. | title=The atmospheric parameters and spectral interpolator for the MILES stars | journal=Astronomy & Astrophysics | volume=531 | page=A165 |date=July 2011 | doi=10.1051/0004-6361/201116769 | bibcode=2011A&A...531A.165P | postscript=. | arxiv=1104.4952| s2cid=54940439 }}

{{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 | publication-place=Ann Arbor, Michigan | publisher=Department of Astronomy, University of Michigan | volume=5 | year=1999 | bibcode=1999MSS...C05....0H | postscript=.}}

{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=.}}

{{cite simbad | title=* eps Sex | accessdate=2016-12-16 | postscript=.}}

}}

Category:F-type subgiants

Category:Sextans

Sextantis, Epsilon

Category:Durchmusterung objects