Zeta Crucis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crux |
| Right ascension | 12h 18m 26.2485s[1] |
| Declination | –64° 00′ 11.055″[1] |
| Apparent magnitude (V) | 4.04[2] |
| Characteristics | |
| Spectral type | B2.5V[3] |
| U−B color index | –0.68[2] |
| B−V color index | –0.17[2] |
| Astrometry | |
| Radial velocity (Rv) | +15.8[4] km/s |
| Proper motion (μ) | RA: –33.19[1] mas/yr Dec.: –10.38[1] mas/yr |
| Parallax (π) | 9.03 ± 0.55[1] mas |
| Distance | 360 ± 20 ly (111 ± 7 pc) |
| Details | |
| Temperature | 3,832[5] K |
| Rotational velocity (v sin i) | 115[6] km/s |
| Age | 7 × 106[7] years |
| Other designations | |
ζ Crucis (ζ Cru, Zeta Crucis) is a binary star in the constellation Crux. It has an apparent magnitude of 4.06m. The primary star is classified as a blue-white dwarf (spectral class B2.5 V). The secondary component is much fainter, with an apparent magnitude of 12.49.[9] ζ Crucis is located at about 360 light-years from the Sun.
References
- 1 2 3 4 5 Perryman, M. A. C.; et al. (1997). "The Hipparcos Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- 1 2 3 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
- ↑ Hiltner, W. A.; Garrison, R. F.; Schild, R. E. (July 1969). "MK Spectral Types for Bright Southern OB Stars". Astrophysical Journal. 157: 313–326. Bibcode:1969ApJ...157..313H. doi:10.1086/150069.
- ↑ 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.
- ↑ Gerbaldi, M.; Faraggiana, R.; Balin, N. (November 2001). "Binary systems with post-T Tauri secondaries". Astronomy and Astrophysics. 379: 162–184. Bibcode:2001A&A...379..162G. doi:10.1051/0004-6361:20011298.
- ↑ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1): 1. Bibcode:1970CoAsi.239....1B.
- ↑ Grosbol, P. J. (June 1978). "Space velocities and ages of nearby early-type stars". Astronomy and Astrophysics Supplement Series. 32: 409–421. Bibcode:1978A&AS...32..409G.
- ↑ "zet Cru – Star in double system". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-09-10.
- ↑ Gahm, G. F.; Ahlin, P.; Lindroos, K. P. (January 1983). "A study of visual double stars with early type primaries. I - Spectroscopic results". Astronomy and Astrophysics Supplement Series. 51: 143–159. Bibcode:1983A&AS...51..143G.
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