Epoch J2000 Equinox J2000
|Right ascension||12h 42m 50.2656s|
|Declination||−63° 03′ 31.048″|
|Apparent magnitude (V)||5.316|
|U−B color index||−0.82|
|B−V color index||+0.27|
|Variable type||γ Cas|
|Radial velocity (Rv)||+35 km/s|
|Proper motion (μ)||RA: −13.32 mas/yr
Dec.: −3.47 mas/yr
|Parallax (π)||3.32 ± 0.56 mas|
|Distance||approx. 1,000 ly
(approx. 300 pc)
|Surface gravity (log g)||3.5–3.9 cgs|
|Rotational velocity (v sin i)||300–400 km/s|
HD 110432 is a Be star in the constellation Crux, behind the southern Coalsack Nebula. It has a stellar classification of B1IVe, which means it is a subgiant star of class B that displays emission lines in its spectrum. This is a variable star of the Gamma Cassiopeiae type, indicating it is a shell star with a circumstellar disk of gas about the equator, and has the variable star designation BZ Crucis. It is not known to be a member of a binary system, although it is probably a member of the open cluster NGC 4609. This star is moderately luminous in the X-ray band, with a variable energy emission of 1032–33 erg s−1 in the range 0.2−12 keV. The X-ray emission may be caused by magnetic activity, or possibly by accretion onto a white dwarf companion.
- Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- "HR 4830 -- Be Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-12-09.
- Lopes de Oliveira, R.; et al. (November 2007). "On the X-ray and optical properties of the Be star HD 110432: a very hard-thermal X-ray emitter". Astronomy and Astrophysics. 474 (3): 983–996. Bibcode:2007A&A...474..983L. arXiv: . doi:10.1051/0004-6361:20077295.
- Cousins, A. W. J. (1973). "UBV photometry of some southern stars". Monthly Notes of the Astronomical Society of Southern Africa. 32: 11. Bibcode:1973MNSSA..32...11C.
- Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick. Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Retrieved 2009-09-10.
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