HD 124448
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 14m 58.6293s[2] |
| Declination | −46° 17′ 19.294″[2] |
| Apparent magnitude (V) | 9.94 - 10.03[3] |
| Characteristics | |
| Evolutionary stage | B(p)[4] |
| Variable type | PV Tel?[3] |
| Astrometry | |
| Proper motion (μ) | RA: −6.544±0.038 mas/yr Dec.: −0.049±0.032 mas/yr |
| Parallax (π) | 0.6240 ± 0.0312 mas[2] |
| Distance | 5,200 ± 300 ly (1,600 ± 80 pc) |
| Details | |
| Mass | 6.7[5] M☉ |
| Radius | 5.2[2] R☉ |
| Luminosity | 1,282[2] L☉ |
| Surface gravity (log g) | 3.86[5] cgs |
| Temperature | 15,481[5] K |
| Metallicity [Fe/H] | −0.55[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 124448, also called Popper's Star and V821 Centauri, is an extreme helium star in the Centaurus constellation.[1] Discovered by astronomer Daniel Popper, this star has a spectral classification of B2-B3 and a radius of 13 R☉.[7][8]
Peter M. Corben et al. announced that the star is a variable star, in 1972.[9] It was given its variable star designation, V821 Centauri, in 1981.[10]
References
[edit]- ^ a b Jeffery, C. Simon; Barentsen, Geert; Handler, Gerald (2020). "TESS photometry of extreme helium stars PV Tel and V821 Cen". Monthly Notices of the Royal Astronomical Society. 495 (1): L135 – L138. arXiv:2006.00946. Bibcode:2020MNRAS.495L.135J. doi:10.1093/mnrasl/slaa075.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b "V821 Cen". General Catalog of Variable Stars. Sternberg Astronomical Institute. Retrieved 24 May 2023.
- ^ Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor : Dept. Of Astronomy. Bibcode:1978mcts.book.....H.
- ^ a b c d Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
- ^ "HD 124448". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 23, 2023.
- ^ Schoenberner, D.; Wolf, R. E. A. (1974). "Fine analysis of Popper's star HD 124448". Astronomy and Astrophysics. 37: 87. Bibcode:1974A&A....37...87S.
- ^ Popper, Daniel M. (1946). "The Spectrum of HD 124448. Second Note". Publications of the Astronomical Society of the Pacific. 58 (345): 370. Bibcode:1946PASP...58..370P. doi:10.1086/125875. S2CID 121599294.
- ^ Corben, P. M.; Carter, B. S.; Banfield, R. M.; Harvey, G. M. (1972). "UBV Photometry of 500 Southern Stars [erratum: 1973MNSSA..32...48C]". Monthly Notes of the Astron. Soc. Southern Africa. 31: 7–22. Retrieved 16 January 2025.
- ^ Kholopov, P. N.; Samus, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (February 1981). "65th Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1921: 1–21. Bibcode:1981IBVS.1921....1K. Retrieved 16 January 2025.
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