Mu Crucis
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Crux |
| μ1 Crucis | |
| Right ascension | 12h 54m 35.6249s[1] |
| Declination | −57° 10′ 40.527″[1] |
| Apparent magnitude (V) | 3.988[2] |
| μ2 Crucis | |
| Right ascension | 12h 54m 36.8865s[1] |
| Declination | −57° 10′ 07.214″[1] |
| Apparent magnitude (V) | 5.113[3] |
| Characteristics | |
| Spectral type | B2IV-V[2]/B5Vne[3] |
| U−B color index | −0.75/−0.50[4] |
| B−V color index | −0.17/−0.11[4] |
| Astrometry | |
| Radial velocity (Rv) | +13.9[5] km/s |
| Proper motion (μ) | RA: −30.45[1] mas/yr Dec.: −13.55[1] mas/yr |
| Parallax (π) | 8.64 ± 0.58[1] mas |
| Distance | 380 ± 30 ly (116 ± 8 pc) |
| Radial velocity (Rv) | +13[5] km/s |
| Proper motion (μ) | RA: −32.35[1] mas/yr Dec.: −10.93[1] mas/yr |
| Parallax (π) | 9.03 ± 0.61[1] mas |
| Distance | 360 ± 20 ly (111 ± 7 pc) |
| Details | |
| Rotational velocity (v sin i) | −/124[6] km/s |
| Other designations | |
Mu Crucis (μ Cru, μ Crucis) the seventh-brightest star in the constellation Crux, or Southern Cross. It is a wide binary of spectral class B stars, each of magnitude 4.0 and 5.1. They lie about 360 to 380 light-years away.
References
- 1 2 3 4 5 6 7 8 9 10 Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- 1 2 "HR 4898 -- Variable Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-06-08.
- 1 2 3 "HIP 63005 -- Be Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-06-08.
- 1 2 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.
- 1 2 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. Bibcode:1967IAUS...30...57E. Retrieved 2009-09-10.
- ↑ 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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