Lambda Crucis (λ Crucis / λ Cru) is a star in the southern 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 | B4 Vne[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) |
Absolute magnitude (MV) | –1.2[6] |
Details | |
Mass | 5.0 ± 0.1[7] M☉ |
Luminosity | 790[6] L☉ |
Surface gravity (log g) | 4.00[6] cgs |
Temperature | 15,800[6] K |
Rotational velocity (v sin i) | 341[8] km/s |
Age | 53.3 ± 8.1[7] Myr |
Other designations | |
This star is a proper motion member of the Lower-Centaurus Crux sub-group in the Scorpius-Centaurus OB association, the nearest such association of co-moving massive stars to the Sun.[6]
References
- ^ a b c d e Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
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: Explicit use of et al. in:|author=
(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.
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: 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.
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: Unknown parameter|booktitle=
ignored (|book-title=
suggested) (help); Unknown parameter|editors=
ignored (|editor=
suggested) (help) - ^ a b c d e de Geus, P. T.; de Zeeuw; Lub, J. (June 1989), "Physical parameters of stars in the Scorpio-Centaurus OB association", Astronomy and Astrophysics, 216 (1–2): 44–61, Bibcode:1989A&A...216...44D
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x
{{citation}}
: CS1 maint: unflagged free DOI (link) - ^ 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.
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: CS1 maint: multiple names: authors list (link)