HD 124448

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]

HD 124448

A light curve for V821 Centauri, plotted from TESS data. Adapted from Jeffery et al. (2020)[1]
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
V821 Cen, HD 124448, HIP 69619, 2MASS J14145863-4617192[4]
Database references
SIMBAD	data

References

1. 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.
2. 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.
3. "V821 Cen". General Catalog of Variable Stars. Sternberg Astronomical Institute. Retrieved 24 May 2023.
4. "HD 124448". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 23, 2023.
5. 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.
6. 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.