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☉.[5][6]
| 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] |
| 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) |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 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.
- ^ "V821 Cen". General Catalog of Variable Stars. Sternberg Astronomical Institute. Retrieved 24 May 2023.
- ^ "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.
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