HD 111915

e Centauri
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Centaurus
Right ascension	12h 53m 06.91s
Declination	−48° 56′ 35.9″
Apparent magnitude (V)	+4.33
Characteristics
Spectral type	K3-4III
U−B color index	+1.58
B−V color index	+1.344±0.068
Astrometry
Radial velocity (Rv)	−2.4±1.6 km/s
Proper motion (μ)	RA: -79.19 ± 0.15 mas/yr ; Dec.: -24.26 ± 0.13 mas/yr
Parallax (π)	11.08 ± 0.19 mas
Distance	294 ± 5 ly ; (90 ± 2 pc)
Absolute magnitude (MV)	−0.45
Details
Radius	30.62+1.48; −5.77 R☉
Luminosity	277±13 L☉
Temperature	4,258+468; −100 K
Other designations
	e Cen, CD−48°7753, FK5 3024, GC 17473, HD 111915, HIP 62867, HR 4888, SAO 223731
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.^[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]

References

^ ^a ^b ^c ^d ^e ^f 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. S2CID 18759600. Vizier catalog entry
^ ^a ^b ^c ^d ^e 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.
^ ^a ^b Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
^ ^a ^b ^c 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.
^ "e Cen". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-28.
^ 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. S2CID 14878976.

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[vanLeeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f 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. S2CID 18759600. Vizier catalog entry

[Anderson_Francis_2012-2] 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.

[Houk1978-3] Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.

[GaiaDR2-4] 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.

[SIMBAD-5] "e Cen". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-28.

[Eggleton_Tokovinin_2008-6] 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. S2CID 14878976.

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Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Centaurus
Right ascension	12^h 53^m 06.91^s^[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 (R_v)	−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 mas^[1]
Distance	294 ± 5 ly (90 ± 2 pc)
Absolute magnitude (M_V)	−0.45^[2]

Details

Radius	30.62+1.48 −5.77^[4] `R`_☉
Luminosity	277±13^[4] `L`_☉
Temperature	4,258+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
SIMBAD	data