Iota of the Southern Cross (ι Cru / ι Crucis) is a star in the constellation of the Southern Cross . Visible magnitude 4.69 m (visible to the naked eye). According to the classification, the star belongs to the orange giants (spectral class K1 III). It is 125 light years from the Sun. Has an optical companion spectral class G8.
| Whit of the south cross | |||
|---|---|---|---|
| Star | |||
 | |||
| Observational data ( Age J2000.0 ) | |||
| Right ascension | |||
| Declination | |||
| Distance | 125 St. years old | ||
| Visible magnitude ( V ) | 4.693 [1] | ||
| Constellation | South Cross | ||
| Astrometry | |||
| Radial velocity ( R v ) | 7.1 ± 0.9 km / s | ||
| Own movement (μ) | RA: 112.93 ± 0.20 mas per year Dec: -64.62 ± 0.17 mas per year | ||
| Parallax (π) | 27.17 ± 0.24 mas | ||
| Specifications | |||
| Spectral class | K0III | ||
| Color Index ( B - V ) | +1.05 [3] | ||
| Color Index ( U - B ) | +0.93 [3] | ||
| physical characteristics | |||
| Temperature | |||
| |||
| Database Information | |||
| SIMBAD | data | ||
Notes
- ↑ iot Cru - Star in double system . SIMBAD Astronomical Database . Center de Données astronomiques de Strasbourg. Date of treatment April 6, 2010. Archived April 23, 2013.
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.
- ↑ 1 2 Johnson, HL; Iriarte, B .; Mitchell, RI; Wisniewskj, WZ UBVRIJKL photometry of the bright stars (Eng.) // Communications of the Lunar and Planetary Laboratory . - University of Arizona Press , 1966. - Vol. 4 , no. 99 . - .
- ↑ 1 2 S. Alves, L. Benamati, Santos N. C. et al. Determination of the spectroscopic stellar parameters for 257 field giant stars // Mon. Not. R. Astron. Soc. / D. Flower - OUP , 2015. - Vol. 448, Iss. 3. - P. 2749–2765. - ISSN 0035-8711 ; 1365-2966 - doi: 10.1093 / MNRAS / STV189 - arXiv: 1503.02556
Links
- Iota of the Southern Cross on WikiSky : DSS2 , SDSS , GALEX , IRAS , H α , X-ray , astrophoto , sky map , articles and images