HD 111915

HD 111915 is a single[6] star in the southern constellation of Centaurus. It has the Bayer designation e Centauri, while HD 111915 is the star's identifier in the Henry Draper Catalogue. This is an aging giant star with a stellar classification of K3-4III.[3] It is faintly visible to the naked eye with an apparent visual magnitude of +4.33.[2] The distance to this star is approximately 294 light years based on parallax.[1]

This article is about e Centauri. It is not to be confused with E Centauri or ε (epsilon) Centauri.
e Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 53m 06.91s[1]
Declination −48° 56′ 35.9″[1]
Apparent magnitude (V) +4.33[2]
Characteristics
Spectral type K3-4III[3]
U−B color index +1.58
B−V color index +1.344±0.068[2]
Astrometry
Radial velocity (Rv)−2.4±1.6[2] km/s
Proper motion (μ) RA: -79.19 ± 0.15[1] mas/yr
Dec.: -24.26 ± 0.13[1] mas/yr
Parallax (π)11.08 ± 0.19[1] mas
Distance294 ± 5 ly
(90 ± 2 pc)
Absolute magnitude (MV)−0.45[2]
Details
Radius30.62+1.48
−5.77[4] R☉
Luminosity277±13[4] L☉
Temperature4,258+468
−100[4] K
Other designations
e Cen, CD−48°7753, FK5 3024, GC 17473, HD 111915, HIP 62867, HR 4888, SAO 223731[5]
Database references
SIMBADdata

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  3. Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  5. "e Cen". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-28.
  6. Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
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