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 261 light-years away from the Sun.[2]
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Libra |
| Right ascension | 15h 29m 34.7424s[1] |
| Declination | −17° 26′ 27.378″[1] |
| Apparent magnitude (V) | 6.69[1] |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | Ap |
| Variable type | α2 CVn |
| Astrometry | |
| Proper motion (μ) | RA: −68.387[1] mas/yr Dec.: 7.364[1] mas/yr |
| Parallax (π) | 12.6122 ± 0.0334 mas[1] |
| Distance | 258.6 ± 0.7 ly (79.3 ± 0.2 pc) |
| Details | |
| Mass | 1.77 M☉ |
| Radius | 1.97 R☉ |
| Luminosity | 10.473 L☉ |
| Temperature | 7406 K |
| Age | 1.096 Gyr |
| Other designations | |
GSC 06188-01530, HD 137949, BD-16 4093, SAO 159292, HIP 75848, 2MASS J15293475-1726274, GC 20814, GCRV 8945, HIC 75848, NSV 7104, PPM 230311, SRS 12967, TD1 18282, TYC 6188-1520-1, UBV 13283, UBV M 20794, uvby98 100137949 V, GZ Lib, WDS J15296-1726A, YZ 107 5681, uvby98 100137949, Gaia DR1 6258378300780159232, WEB 12909, Gaia DR2 6258378305082833408, ζ2 Lib, GEN# +1.00137949, SKY# 28036, Renson 39240, UC 2014A, 33 Lib | |
| Database references | |
| SIMBAD | data |
Zeta2 Librae does not have an HR number, although it is included in the Bright Star Catalogue Supplement.[3][4]
Characteristics
edit
33 Librae is an F-type main sequence star.[2] It is an α2 Canum Venaticorum variable[2] or a rapidly oscillating Ap star, thus it bears the variable star designation GZ Librae and is almost 14 times brighter than the Sun.[6]
See also
editReferences
edit- ^ a b c d e f Gaia Collaboration (2020-11-01). "VizieR Online Data Catalog: Gaia EDR3 (Gaia Collaboration, 2020)". VizieR Online Data Catalog: I/350. Bibcode:2020yCat.1350....0G.
- ^ a b c "Universe Guide–ζ2/33 Librae". Universe Guide. Retrieved 2023-11-19.
- ^ 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.
- ^ 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.
- ^ 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. arXiv:1110.6283. Bibcode:2012MNRAS.420..757W. doi:10.1111/j.1365-2966.2011.20090.x.
- ^ Anderson, E.; Francis, C. (2012). "HIP 75848". Extended Hipparcos Compilation (XHIP). VizieR. Retrieved 2021-01-08.