HD 124448

Last updated
HD 124448
V821CenLightCurve.png
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]
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
V821  Cen, HD  124448, HIP  69619, 2MASS  J14145863-4617192 [6]
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. [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

  1. 1 2 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. 1 2 3 4 5 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. 1 2 "V821 Cen". General Catalog of Variable Stars. Sternberg Astronomical Institute. Retrieved 24 May 2023.
  4. ↑ Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor: Dept. Of Astronomy. Bibcode:1978mcts.book.....H.
  5. 1 2 3 4 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.
  6. ↑ "HD 124448". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved May 23, 2023.
  7. ↑ 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.
  8. ↑ 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.
  9. ↑ 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. Bibcode:1972MNSSA..31....7C . Retrieved 16 January 2025.
  10. ↑ 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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