Eta Pavonis

{{Starbox begin

| name = η Pavonis

}}

{{Starbox image

| image =

{{Location mark

|image=Pavo constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=Eta Pavonis

|x=798|y=333

}}

| caption = Location of η Pavonis (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Pavo

| ra = {{RA|17|45|43.98605}}

| dec = {{DEC|−64|43|25.9394}}

| appmag_v = 3.61

}}

{{Starbox character

| class = K2II

| b-v = +1.19

| u-b = +1.17

}}

{{Starbox astrometry

| radial_v = −7.60

| prop_mo_ra = −11.96

| prop_mo_dec = −56.57

| parallax = 9.26

| p_error = 0.18

| parallax_footnote =

| absmag_v = {{val|-1.6}}

}}

{{Starbox detail

| mass = 4

| radius = {{Val|33.49|8.17|4.57}}

| temperature = {{Val|4642|354|480|fmt=commas}}

| luminosity = {{Val|469|20}}

| rotational_velocity = < 1.5

| metal_fe = +0.15

| gravity = 1.97

| age_myr =

}}

{{Starbox catalog

| names = {{odlist | B=η Pav | CPD=−64°3662 | FK5=661 | HD=160635 | HIP=86929 | HR=6582 | SAO=245369 | GC=254020 }}

}}

{{Starbox reference

| Simbad = Eta+Pavonis

}}

Eta Pavonis, a name latinized from η Pavonis, is a single star in the southern constellation of Pavo, positioned near the western constellation border next to Ara. It has an orange hue and is visible to the naked eye with an apparent visual magnitude of 3.61. Based on parallax, this object is located at a distance of approximately {{convert|108|pc|ly|order=flip}} from the Solar System. It has an absolute magnitude of −1.6, and is drifting closer with a radial velocity of −7.6 km/s.

This is an evolved bright giant star with a stellar classification K2II, between the classifications of giant and supergiant. Having exhausted the supply of hydrogen at its core, it has expanded to around 33.5 times the radius of the Sun. The star is radiating 469 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,642 K.

References

{{reflist|refs=

{{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

| 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 }}

{{cite journal

| last1=Van Leeuwen | first1=F.

| title=Validation of the new Hipparcos reduction

| 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

}} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2086929 Vizier catalog entry]

{{cite journal

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

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

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

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015

| s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=86929 Vizier catalog entry]

{{cite book

| first1=N. | last1=Houk | first2=A. P. | last2=Cowley

| title=University of Michigan Catalogue of two-dimensional spectral types for the HD stars

| publisher=Department of Astronomy, University of Michigan

| volume=1 | pages=19 + 452 | date=1975

| bibcode=1975mcts.book.....H }}

{{cite journal

| last=Mallama | first=A.

| title=Sloan Magnitudes for the Brightest Stars

| journal=The Journal of the American Association of Variable Star Observers

| volume=42 | pages=443 | year=2014

| issue=2

| bibcode=2014JAVSO..42..443M

}}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=160635 Vizier catalog entry]

{{Cite journal |last1=Smith |first1=Graeme H. |last2=Langland-Shula |first2=Laura E. |date=May 2023 |title=FUSE Spectroscopy of Two Luminosity Class II Giants |journal=Research Notes of the AAS |language=en |volume=7 |issue=5 |pages=98 |doi=10.3847/2515-5172/acd6e9 |doi-access=free |bibcode=2023RNAAS...7...98S |issn=2515-5172 }}

{{Cite journal

| last=Gontcharov | first=G. A.

| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system

| journal=Astronomy Letters

| volume=32 | issue=11 | pages=759–771 | year=2006

| bibcode=2006AstL...32..759G | arxiv=1606.08053

| doi=10.1134/S1063773706110065 | s2cid=119231169

}}

{{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.