Alpha Flies (α Muscae / α Mus) is a variable star in the constellation Flies . The star is a white-blue subgiant of spectral class B, which shines 4520 times stronger than the Sun , but mainly its radiation occurs in ultraviolet light [2] .
| Alpha Flies | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Right ascension | |||
| Declination | |||
| Distance | 306 St. years (93.86 pc ) | ||
| Visible magnitude ( V ) | from +2.68 to +2.73 | ||
| Constellation | Fly | ||
| Astrometry | |||
| Radial velocity ( R v ) | +13 km / s | ||
| Own movement (μ) | RA: -111.94 mas per year Dec: -12.44 mas per year | ||
| Parallax (π) | 10.67 ± 0.48 mas | ||
| Absolute magnitude (V) | from -2.18 to -2.13 | ||
| Characteristics | |||
| Spectral class | B2IV-V | ||
| Color Index ( B - V ) | -0.16 | ||
| Variability | BCEP | ||
| physical characteristics | |||
| Weight | 8 M ☉ | ||
| Radius | 4.7 R ☉ | ||
| Temperature | 21.900 K | ||
| Luminosity | 4250 (bolometric) L ☉ | ||
| Rotation | 114 km / s | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
Like most stars of spectral class B, Alpha Flies rotates quickly, making a full revolution in 2 days. The star also has a β Cephei type of variability and its apparent magnitude changes by about a percentage within 2.2 hours. At an angular distance of 30 arc seconds , there is a star that has a visible magnitude of +13 m , but most likely it is optically double.
Alpha Flies is part of the unrelated centaur-Southern Cross stellar association , which includes stars of the spectral class B and O ( Hadar , Beckrucks , Dekruks , ε Centauri ), formed at about the same time in a massive interstellar cloud .
Notes
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.
- ↑ "Alpha Muscae (Stars, Jim Kaler)" (English) (inaccessible link) . Archived on April 16, 2009.