Lambda Crucis (λ Crucis / λ Cru) is a star in the constellation Crux. The star is classified as a blue-white dwarf (spectral class B4 Vn). The apparent magnitude of λ Crucis is 4.6, but it is not stable. The star is a β Cephei-type variable, and its brightness varies with an amplitude of 0.02m period being 0.3951 days.[4] λ Crucis is located at 360 light-years from the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crux |
| Right ascension | 12h 54m 39.1821s[1] |
| Declination | −59° 08′ 48.124″[1] |
| Apparent magnitude (V) | 4.602[2] |
| Characteristics | |
| Spectral type | B4Vne[2] |
| U−B color index | −0.60[3] |
| B−V color index | −0.15[3] |
| Variable type | Beta Cephei[4] |
| Astrometry | |
| Radial velocity (Rv) | 12[5] km/s |
| Proper motion (μ) | RA: −33.35[1] mas/yr Dec.: −14.75[1] mas/yr |
| Parallax (π) | 9.06 ± 0.60 mas[1] |
| Distance | 360 ± 20 ly (110 ± 7 pc) |
| Details | |
| Rotational velocity (v sin i) | 341[6] km/s |
| Other designations | |
References
- ^ a b c d e Perryman, M. A. C.; et al. (1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
{{cite journal}}: Explicit use of et al. in:|author=(help); Unknown parameter|month=ignored (help) - ^ a b c "SIMBAD Astronomical Database". Centre de Données astronomiques de Strasbourg. Retrieved 2007-01-04.
- ^ a b Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99). Bibcode:1966CoLPL...4...99J.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ a b Samus, N. N. (2004). "Combined General Catalogue of Variable Stars (GCVS4.2)". Retrieved 2007-01-04.
{{cite web}}: Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Retrieved 2009-09-10.
{{cite conference}}: Unknown parameter|booktitle=ignored (|book-title=suggested) (help); Unknown parameter|editors=ignored (|editor=suggested) (help) - ^ Uesugi, Akira; Fukuda, Ichiro (1970). "Catalogue of rotational velocities of the stars". Contributions from the Institute of Astrophysics and Kwasan Observatory. University of Kyoto. Bibcode:1970crvs.book.....U.
{{cite journal}}: CS1 maint: multiple names: authors list (link)
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