Article · Wikipedia archive · Last revised Jun 23, 2026

HD 129456

HD 129456, also known by its Bayer designation c1 Centauri, is a star in the constellation Centaurus. c¹ Centauri is an orange K-type giant with an apparent magnitude of +4.06. It is approximately 209 light years from Earth.

Last revised
Jun 23, 2026
Read time
≈ 2 min
Length
348 w
Citations
18
Source
Wikipedia ↗
c1 Centauri
Location of c1 Centauri (circled in red)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus1
Right ascension 14h 43m 39.44s2
Declination −35° 10′ 25.2″2
Apparent magnitude (V) +4.063
Characteristics
Evolutionary stage red giant branch4
Spectral type K3III3
U−B color index +1.53
B−V color index +1.3563
Variable type none
Astrometry
Radial velocity (Rv)−38 km/s
Proper motion (μ) RA: −61.46±0.152 mas/yr
Dec.: −176.84±0.142 mas/yr
Parallax (π)15.57±0.16 mas2
Distance209 ± 2 ly
(64.2 ± 0.7 pc)
Absolute magnitude (MV)−0.203
Details
Mass1.235 M☉
Radius256 R☉
Luminosity1745 L☉
Surface gravity (log g)1.867 cgs
Temperature4,2405 K
Metallicity [Fe/H]−0.205 dex
Other designations
HR 5485, HD 129456, CD−34°9868, FK5 544, HIP 72010, SAO 205871, GC 198208
Database references
SIMBADdata

HD 129456, also known by its Bayer designation c1 Centauri (c1 Cen), is a star in the constellation Centaurus. c¹ Centauri is an orange K-type giant with an apparent magnitude of +4.06. It is approximately 209 light years from Earth.

References

References

  1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. van Leeuwen, Floor (13 August 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. eISSN 1432-0746. ISSN 0004-6361. Vizier catalog entry
  3. Jasniewicz, G.; et al. (February 1999). "Late-type giants with infrared excess. I. Lithium abundances". Astronomy and Astrophysics. 342: 831–838. Bibcode:1999A&A...342..831J.
  4. Jura, M. (1999). "Dust around First-Ascent Red Giants". The Astrophysical Journal. 515 (2): 706. Bibcode:1999ApJ...515..706J. doi:10.1086/307064.
  5. Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy and Astrophysics. 633: A34. arXiv:1910.12732. Bibcode:2020A&A...633A..34C. doi:10.1051/0004-6361/201936360.
  6. Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
  7. Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A.
  8. "HD 129456". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-05-22.