η Shield ( lat. η Scuti / η Sct ) is a star that is in the constellation Shield at a distance of approximately 207 light years from us, the apparent magnitude is +4.82. This is an orange giant of spectral class K. This star has a mass of 1.4 times the mass of the sun, the radius is 9.6 times the radius of the sun. The luminosity of a star is 40.5 times more powerful than solar, the surface temperature is heated to 4710 Kelvin. Its age is about 2.8 billion years [1] . η Shield is approaching the solar system at a speed of 92.8 km / s.
| η Shield | |||
|---|---|---|---|
| Star | |||
| Observational data ( Epoch J2000.0) | |||
| Right ascension | |||
| Declination | |||
| Distance | 207 sv. years (63.5 pc ) | ||
| Visible magnitude ( V ) | 4.82 | ||
| Constellation | Shield | ||
| Astrometry | |||
| Radial velocity ( R v ) | -92.8 km / s | ||
| Proper motion (μ) | RA: 60.77 mas per year Dec: -40.90 mas per year | ||
| Parallax (π) | 15.77 ± 0.89 mas | ||
| Absolute magnitude (V) | +0.81 | ||
| Specifications | |||
| Spectral class | K2 III | ||
| Color Indicator ( B - V ) | 1.04 | ||
| physical characteristics | |||
| Weight | 1.4 M ☉ | ||
| Radius | 9.6 R ☉ | ||
| Age | 2.8 billion years | ||
| Temperature | 4710 K | ||
| Luminosity | 40.5 L ☉ | ||
| Metallicity | [M / H] =? | ||
| |||
| Information in databases | |||
| SIMBAD | |||
See also
- List of stars of the constellation Shield
Notes
- ↑ da Silva, L .; Girardi, L .; Pasquini, L. & Setiawan, J. (2006), " Basic sample parameters of evolved stars ", Astronomy and Astrophysics T. 458 (2): 609–623 , DOI 10.1051 / 0004-6361: 20065105
Links
- Astronomical database SIMBAD (eng.)
- Star catalog VizieR (English)