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Zeta2 Librae

{{Short description|Alpha2 Canum Venaticorum variable in Libra}}

{{hatnote|For other star systems with a similar Bayer designation, see Zeta Librae.}}

{{DISPLAYTITLE:Zeta2 Librae}}

{{Starbox begin

|name=Zeta2 Librae}}

{{Starbox image

| image = {{Location mark

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

|label=|position=right

|mark=Red circle.svg|mark_width=12|mark_link=ζ Lib

|x=368|y=456

}}

|caption=Location of ζ2 Librae (circled)

}}

{{Starbox observe

|epoch=J2000.0

|constell=Libra

|ra={{RA|15|29|34.7424}}

|dec={{DEC|-17|26|27.378}}

|appmag_v=6.66 - 6.71

}}

{{Starbox character

|type=main sequence star

|class=F0VspEuGdSr

|variable=roAp

}}

{{Starbox astrometry

|prop_mo_ra=−68.387

|prop_mo_dec=+7.364

|pm_footnote =

|parallax= 12.6122

|p_error= 0.0334

|parallax_footnote=

}}

{{Starbox detail

|mass=1.7

|temperature=7,543

|luminosity=9.7

|radius=1.8

|gravity=4.15

|metal_fe=0.39

|age_myr=977

}}

{{starbox catalog

|names=33 Librae, GZ Librae, HD 137949, HIP 75848, 2MASS J15293475-1726274, BD-16 4093, GSC 06188-01530, SAO 159292, TYC 6188-1520-1, WDS J15296-1726A

}}

{{Starbox reference

|Simbad=GZ+Lib

}}

{{Starbox end}}

ζ2 Librae (abbreviated Zeta2 Librae, Zeta2 Lib, ζ2 Lib), also known as 33 Librae, is a variable star in the constellation Libra. It is approximately 260 light-years away from the Sun.

Zeta2 Librae does not have an HR number, although it is included in the Bright Star Catalogue Supplement.

Characteristics

File:GZLibLightCurve.png for Zeta2 Librae, adapted from Wraight et al. (2012)]]

33 Librae is an F-type main sequence star, and show abundance of europium, gadolinium and strontium in the spectrum. It is a rapidly oscillating Ap star. It bears the variable star designation GZ Librae.

{{clear left}}

See also

References

{{reflist| refs=

{{cite Gaia DR3|6258378305082833408}}

{{cite journal |bibcode=2017ARep...61...80S |title=General catalogue of variable stars: Version GCVS 5.1 |last1=Samus' |first1=N. N. |last2=Kazarovets |first2=E. V. |last3=Durlevich |first3=O. V. |last4=Kireeva |first4=N. N. |last5=Pastukhova |first5=E. N. |journal=Astronomy Reports |date=2017 |volume=61 |issue=1 |page=80 |doi=10.1134/S1063772917010085 }}

{{cite journal |bibcode=1979PASP...91..176A |title=Spectral types of stars with unusual photometric indices |last1=Abt |first1=H. A. |last2=Brodzik |first2=D. |last3=Schaefer |first3=B. |journal=Publications of the Astronomical Society of the Pacific |date=1979 |volume=91 |page=176 |doi=10.1086/130467 }}

{{cite journal

| last1=Wraight | first1=K. T. | last2=Fossati | first2=L. | last3=Netopil | first3=M.

| last4=Paunzen | first4=E. | last5=Rode-Paunzen | first5=M. | last6=Bewsher | first6=D.

| last7=Norton | first7=A. J. | last8=White | first8=Glenn J.

| title=A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars

| journal=Monthly Notices of the Royal Astronomical Society | date=February 2012

| volume=420 | issue=1 | pages=757–772 | bibcode=2012MNRAS.420..757W | doi=10.1111/j.1365-2966.2011.20090.x

| doi-access=free | arxiv=1110.6283 }}

{{cite journal

| bibcode=1982bsc..book.....H|title=The Bright Star Catalogue. Fourth revised edition. (Containing data compiled through 1979)

| journal=The Bright Star Catalogue. Fourth Revised Edition. (Containing Data Compiled Through 1979)

| last1=Hoffleit | first1=D. | last2=Jaschek | first2=C. | year=1982}}

{{cite journal

| bibcode=1995yCat.5050....0H

| title=VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)

| journal=VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H

| volume=5050 | last1=Hoffleit | first1=D. | last2=Warren | first2=W. H. | year=1995 }}

}}

{{Sky|15|29|34|742|-17|26|27|38}}

{{Stars of Libra}}

Category:Libra (constellation)

Category:F-type main-sequence stars

Category:Alpha2 Canum Venaticorum variables

137949

075848

J15293475-1726274

Category:Rapidly oscillating Ap stars

Librae, GZ