Astronomy:Zeta2 Librae

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Short description: Alpha2 Canum Venaticorum variable in Libra
For other star systems with a similar Bayer designation, see Zeta Librae.
Zeta2 Librae
Location of ζ2 Librae (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Libra
Right ascension  15h 29m 34.7424s[1]
Declination −17° 26′ 27.378″[1]
Apparent magnitude (V) 6.66 - 6.71[2]
Characteristics
Evolutionary stage main sequence star
Spectral type F0VspEuGdSr[3]
Variable type roAp[2]
Astrometry
Proper motion (μ) RA: −68.387[1] mas/yr
Dec.: +7.364[1] mas/yr
Parallax (π)12.6122 ± 0.0334[1] mas
Distance258.6 ± 0.7 ly
(79.3 ± 0.2 pc)
Details
Mass1.7[1] M☉
Radius1.8[1] R☉
Luminosity9.7[1] L☉
Surface gravity (log g)4.15[1] cgs
Temperature7,543[1] K
Metallicity [Fe/H]0.39[1] dex
Age977[1] Myr
Other designations
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
Database references
SIMBADdata

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.[1]

Zeta2 Librae does not have an HR number, although it is included in the Bright Star Catalogue Supplement.[4][5]

Characteristics

A light curve for Zeta2 Librae, adapted from Wraight et al. (2012)[6]

33 Librae is an F-type main sequence star, and show abundance of europium, gadolinium and strontium in the spectrum.[3] It is a rapidly oscillating Ap star.[2] It bears the variable star designation GZ Librae.

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports 61 (1): 80. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S. 
  3. ↑ 3.0 3.1 Abt, H. A.; Brodzik, D.; Schaefer, B. (1979). "Spectral types of stars with unusual photometric indices". Publications of the Astronomical Society of the Pacific 91: 176. doi:10.1086/130467. Bibcode: 1979PASP...91..176A. 
  4. ↑ Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H. 
  5. ↑ Hoffleit, D.; Jaschek, C. (1982). "The Bright Star Catalogue. Fourth revised edition. (Containing data compiled through 1979)". The Bright Star Catalogue. Fourth Revised Edition. (Containing Data Compiled Through 1979). Bibcode: 1982bsc..book.....H. 
  6. ↑ Wraight, K. T.; Fossati, L.; Netopil, M.; Paunzen, E.; Rode-Paunzen, M.; Bewsher, D.; Norton, A. J.; White, Glenn J. (February 2012). "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars". Monthly Notices of the Royal Astronomical Society 420 (1): 757–772. doi:10.1111/j.1365-2966.2011.20090.x. Bibcode: 2012MNRAS.420..757W. 

Coordinates: Sky map 15h 29m 34s, 742-17° 26′ 27″



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