Epsilon Perseus (ε Per) is a variable star in the constellation Perseus . It has the historical name Adid Australis , which means south of the raised hand .
| Epsilon Perseus A / B | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0) | |||
| Type of | BCEP | ||
| Right ascension | |||
| Declination | |||
| Distance | 540 St. years (165.64 pc ) | ||
| Visible magnitude ( V ) | +2.9 | ||
| Constellation | Perseus | ||
| Astrometry | |||
| Radial velocity ( R v ) | +0.8 km / s | ||
| Own movement (μ) | RA: +7.91 mas per year Dec: +12.61 mas per year | ||
| Parallax (π) | 6.06 ± 0.82 mas | ||
| Absolute magnitude (V) | V max = -3.21 m , V min = -3.09 m | ||
| Specifications | |||
| Spectral class | B0.5V / A2V | ||
| Color Index ( B - V ) | -0.19 | ||
| Variability | V max = +3.00 m , V min = +2.88 m | ||
| physical characteristics | |||
| Radius | 7 / - R ☉ | ||
| Temperature | 27.600 / - K | ||
| Luminosity | 24.900 / - L ☉ | ||
| Rotation | 130 km / s | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
ε Per is a multiple star consisting of three components [1] . The main component of Epsilon Perseus A is a β Cepheus type variable and belongs to the spectral class B0.5V, with an average apparent magnitude of 2.9 m [2] .
The system contains the second component of Epsilon Perseus B , which is located at an angular distance of 9.8 arc seconds and rotates around Epsilon Perseus A with a period of 16,000 years at a distance of 1600 a. e. It belongs to the spectral class A2V and has an apparent magnitude of 8.8 m [2] .
Notes
- ↑ Y. Wu, HP Singh, P. Prugniel, et al. Astronom.and Astrophys .. - 2011.
- ↑ 1 2 Epsilon Persei / Adid Australis (Stars, Jim Kaler) (English) (unavailable link) . Archived December 10, 2008.