28 Cancer ( lat. 28 Cancri ) - a variable star , which is located in the constellation Cancer . A star is approximately 271 light years from Earth and has a apparent magnitude of + 6.1. This is a hot yellow-white dwarf of spectral class F of the main sequence .
| 28 Cancer | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0) | |||
| Right ascension | |||
| Declination | |||
| Distance | 271.44 St. years (83,264 pc ) | ||
| Visible magnitude ( V ) | + 6.1 | ||
| Constellation | Crayfish | ||
| Astrometry | |||
| Radial velocity ( R v ) | +9 km / s | ||
| Own movement (μ) | RA: -39.17 mas per year Dec: -47.96 mas per year | ||
| Parallax (π) | 12.01 ± 0.01 mas | ||
| Absolute magnitude (V) | +1.5 | ||
| Specifications | |||
| Spectral class | F0 vn | ||
| Variability | |||
| physical characteristics | |||
| Weight | 2.4 M ☉ | ||
| Radius | 2.8 R ☉ | ||
| Temperature | 7450 ± 50 K | ||
| Luminosity | 21.5 L ☉ | ||
| |||
| Database Information | |||
| SIMBAD | |||
Features
28 Cancer has a mass exceeding the sun by 2.4 times, the radius is 2.8 times greater than the sun. The luminosity of a star is 21.5 times more powerful than the luminosity of the Sun , the surface temperature is approximately 7450 Kelvin. 28 Cancer is moving away from Earth at a speed of 9 km / s.