HE 1219-0312

HE 1219-0312
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 12h 21m 34.143s[1]
Declination −03° 28′ 39.64″[1]
Apparent magnitude (V) 15.94[2]
Characteristics
Evolutionary stage Metal-poor star[citation needed]
Spectral type CEMP[citation needed]
Astrometry
Proper motion (μ) RA: −2.817[1] mas/yr
Dec.: −8.763[1] mas/yr
Parallax (π)0.0893 ± 0.042 mas[1]
Distanceapprox. 40,000 ly
(approx. 11,000 pc)
Details
Mass0.8[3] M☉
Radius2.5[1] R☉
Luminosity6.3[1] L☉
Surface gravity (log g)2.05[3] cgs
Temperature5,100[3] K
Metallicity [Fe/H]−2.96[4] dex
Age13.6[3] Gyr
Other designations
HE 1219-0312, 2MASS J12213413-0328396
Database references
SIMBADdata

HE 1219-0312 is an extremely metal-poor star in the constellation Virgo, The star is located at around 41,400 light years away from earth.[1]

It is thought to be a second generation, Population II or metal-poor star ([Fe/H] = -2.96), The star was found in the sample of extremely metal-poor halo stars from the Hamburg/ESO Survey by W. Hayek and collaborators. The group's research was published in the July 2, 2009 issue of The Astrophysical Journal.[4]

If the age of the star HE 1219-0312 was confirmed at 17.6 billion years, that this star will be the oldest star in the universe.[4]

  1. ^ a b c d e f g h 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.
  2. ^ Beers, Timothy C.; Flynn, Chris; Rossi, Silvia; Sommer-Larsen, Jesper; Wilhelm, Ronald; Marsteller, Brian; Lee, Young Sun; De Lee, Nathan; Krugler, Julie; Deliyannis, Constantine P.; Simmons, Andrew T.; Mills, Elisabeth; Zickgraf, Franz-Josef; Holmberg, Johan; Önehag, Anna; Eriksson, Anders; Terndrup, Donald M.; Salim, Samir; Andersen, Johannes; Nordström, Birgitta; Christlieb, Norbert; Frebel, Anna; Rhee, Jaehyon (2007). "Broadband UBVRCIC Photometry of Horizontal-Branch and Metal-poor Candidates from the HK and Hamburg/ESO Surveys. I.". The Astrophysical Journal Supplement Series. 168 (1): 128. arXiv:astro-ph/0610018. Bibcode:2007ApJS..168..128B. doi:10.1086/509324. S2CID 119500060.
  3. ^ a b c d Reggiani, Henrique; Ji, Alexander P.; Schlaufman, Kevin C.; Frebel, Anna; Necib, Lina; Nelson, Tyler; Hawkins, Keith; Galarza, Jhon Yana (2022). "The Chemical Composition of Extreme-velocity Stars". The Astronomical Journal. 163 (6): 252. arXiv:2203.16364. Bibcode:2022AJ....163..252R. doi:10.3847/1538-3881/ac62d9. S2CID 247793231.
  4. ^ a b c Cite error: The named reference hayek2009 was invoked but never defined (see the help page).