Astronomy:HD 111915
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Short description: Star in the constellation Centaurus
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 53m 06.91s[2] |
| Declination | −48° 56′ 35.9″[2] |
| Apparent magnitude (V) | +4.33[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[3] |
| Spectral type | K3-4III[4] |
| U−B color index | +1.58 |
| B−V color index | +1.344±0.068[1] |
| Astrometry | |
| Radial velocity (Rv) | −2.4±1.6[1] km/s |
| Proper motion (μ) | RA: −79.19±0.15[2] mas/yr Dec.: −24.26±0.13[2] mas/yr |
| Parallax (π) | 11.08 ± 0.19[2] mas |
| Distance | 294 ± 5 ly (90 ± 2 pc) |
| Absolute magnitude (MV) | −0.45[1] |
| Details | |
| Mass | 4.0[3] M☉ |
| Radius | 30[3] R☉ |
| Luminosity | 343[3] L☉ |
| Surface gravity (log g) | 1.99[3] cgs |
| Temperature | 4,526[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.[4] It is faintly visible to the naked eye with an apparent visual magnitude of +4.33.[1] The distance to this star is approximately 294 light years based on parallax.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. Vizier catalog entry
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 4.0 4.1 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.
- ↑ "e Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=e+Cen.
- ↑ 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
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