Eta Antliae

{{Starbox begin

| name = η Antliae

}}

{{Starbox image

| image=

{{Location mark

| image=Antlia constellation map.svg

| mark=Red circle.svg | mark_width=10 | mark_link=η Antliae

| x%=59.5 | y%=54.0

}}

|caption=Location of η Antliae (circled)

}}

{{Starbox observe

| epoch = J2000.0

| ra = {{RA|09|58|52.275}}

| dec = {{DEC|−35|53|27.50}}

| appmag_v = 5.222

| constell = Antlia

}}

{{Starbox character

| class = F1 V

| b-v = +0.333

| u-b = +0.068

| variable =

}}

{{Starbox astrometry

| radial_v = +30

| prop_mo_ra = −89.728

| prop_mo_dec = −15.945

| pm_footnote =

| parallax = 30.0499

| p_error = 0.0776

| parallax_footnote =

| absmag_v = +2.62

}}

{{Starbox detail

| component1 = η Ant A

| mass = 1.55

| radius = 1.72

| luminosity = 6.6

| temperature = 7,132

| metal_fe = −0.20

| gravity = 3.94

| rotational_velocity =

| age_gyr = 0.9

}}

{{Starbox catalog

| names = {{odlist | B=η Antliae, Eta Ant, η Ant | CD=−35 6050 | FK5=377 | HD=86629 | HIP=48926 | HR=3947 | SAO=200926 | PPM=287133 }}

}}

{{Starbox reference

| Simbad=HD+86629

| Simbad2=IDS+09546-3525 |sn2=binary set

}}

Eta Antliae is a double star in the southern constellation of Antlia. Its Bayer designation is Latinized from η Antliae, and abbreviated Eta Ant or η Ant, respectively. The brighter component has an apparent visual magnitude of 5.222, making it visible to the naked eye. Parallax measurements of the system yield a distance estimate of {{Convert|108.5|ly|pc|abbr=off}} from Earth. It is drifting further away with a heliocentric radial velocity of +30 km/s.

The main component has a stellar classification of F1 V, which indicates that it is an F-type main sequence star. This star has 55% more mass than the Sun and a 72% greater radius. It shines with 6.6 times the Sun's luminosity at an effective temperature of 7,132 K. This heat gives it the yellow-white glow of an F-type star. There is a faint companion star located 31 arcseconds away with an apparent magnitude of +11.3. Most likely this pair form a binary star system.

References

{{reflist|refs=

{{citation

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015

| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}

{{citation | display-authors=1 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E. | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R. | title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample | journal=The Astronomical Journal | volume=132 | issue=1 | pages=161–170 |date=July 2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G | arxiv=astro-ph/0603770 | s2cid=119476992 | postscript=. }}

{{citation | 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 | postscript=. }}

{{citation | display-authors=1 | last1=Gutierrez-Moreno | first1=Adelina | last2=Moreno | first2=H. | last3=Stock | first3=J. | last4=Torres | first4=C. | last5=Wroblewski | first5=H. | title=A System of photometric standards | journal=Publications of the Department of Astronomy University of Chile | publisher=Publicaciones Universidad de Chile, Department de Astronomy | volume=1 | pages=1–17 | date=1966 | bibcode=1966PDAUC...1....1G | postscript=. }}

{{cite simbad | title=* eta Ant | accessdate=2012-06-28 | postscript=. }}

{{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 | display-authors=1 | last1=Mallik | first1=Sushma V. | last2=Parthasarathy | first2=M. | last3=Pati | first3=A. K. | title=Lithium and rotation in F and G dwarfs and subgiants | journal=Astronomy and Astrophysics | volume=409 | pages=251–261 |date=October 2003 | issue=1 | doi=10.1051/0004-6361:20031084 | bibcode=2003A&A...409..251M | postscript=. | doi-access=free }}

{{citation |title=The Colour of Stars |date=December 21, 2004 |work=Australia Telescope, Outreach and Education |publisher=Commonwealth Scientific and Industrial Research Organisation |url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |accessdate=2012-01-16 |postscript=. |url-status=dead |archiveurl=https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |archivedate=2012-03-18 }}

}}

Category:F-type main-sequence stars

Category:Antlia

Antliae, Eta

Category:Durchmusterung objects