Dekruks ( Delta of the Southern Cross ; δ Cru / δ Crucis) - a star - a subgiant of spectral class B2IV in the constellation Southern Cross . The proper name is Dekruks made up of the Bayer designation δ and the Latin name for the constellation Crux .
| Derux | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Right ascension | |||
| Declination | |||
| Distance | 345 ± 5 St. years (106 ± 2 pc ) | ||
| Visible magnitude ( V ) | 2.79 | ||
| Constellation | South Cross | ||
| Astrometry | |||
| Radial velocity ( R v ) | +22.2 km / s | ||
| Own movement (μ) | RA: -35.81 mas per year Dec: -10.36 mas per year | ||
| Parallax (π) | 9.45 ± 0.15 mas | ||
| Absolute magnitude (V) | -3.2 | ||
| Specifications | |||
| Spectral class | B2IV | ||
| Color Index ( B - V ) | -0.921 | ||
| Color Index ( U - B ) | -0.235 | ||
| Variability | β Cepheus | ||
| physical characteristics | |||
| Weight | 8.9 ± 0.1 M ☉ | ||
| Radius | 8,0 R ☉ | ||
| Age | 18.1 ± 3.2 Ma | ||
| Temperature | 22570 ± 1840 K | ||
| Luminosity | 10000 L ☉ | ||
| Rotation | 210 | ||
| |||
| Database Information | |||
| SIMBAD | |||
The star is 360 light-years distant from Earth.
Links
- HD 106490 - Variable Star of beta Cep type . SIMBAD Astronomical Database . Date of treatment November 5, 2005. Archived March 15, 2012.
Internet Links
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.