Iota Crucis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crux |
| Right ascension | 12h 45m 38.0515s[1] |
| Declination | −60° 58′ 52.746″[1] |
| Apparent magnitude (V) | 4.693[2] |
| Characteristics | |
| Spectral type | K0 III[2] |
| U−B color index | +0.93[3] |
| B−V color index | +1.05[3] |
| Astrometry | |
| Radial velocity (Rv) | +7.1[4] km/s |
| Proper motion (μ) | RA: 112.51[1] mas/yr Dec.: −64.86[1] mas/yr |
| Parallax (π) | 26.17 ± 0.59 mas[1] |
| Distance | 125 ± 3 ly (38.2 ± 0.9 pc) |
| Other designations | |
Iota Crucis (ι Cru / ι Crucis) is a star in the constellation Crux. It has an apparent magnitude of 4.69m. The star is classified as an orange giant (spectral class K1 III). Iota Crucis is located at 125 light-years from the Sun.
There is a nearby 10.3m class G8 star, but the highly different proper motion reveals it to be a mere line-of-sight optical companion.[citation needed]
References
- ^ a b c d e Perryman, M. A. C.; et al. (July 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- ^ a b c "iot Cru -- Star in double system". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-06.
- ^ 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.
- ^ 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 2009-10-19.
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