BD+14 4559
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 21h 13m 35.99016s |
| Declination | +14° 41′ 21.7858″ |
| Apparent magnitude (V) | 9.78 |
| Characteristics | |
| Spectral type | K2V |
| B−V color index | 1.611±0.218 |
| V−R color index | 0.68 |
| R−I color index | 0.50 |
| Astrometry | |
| Radial velocity (Rv) | −44.41±0.14 km/s |
| Proper motion (μ) | RA: 233.909 mas/yr Dec.: −0.360 mas/yr |
| Parallax (π) | 20.2837±0.0167 mas |
| Distance | 160.8 ± 0.1 ly (49.30 ± 0.04 pc) |
| Absolute magnitude (MV) | 6.14 |
| Absolute bolometric magnitude (Mbol) | 5.56 |
| Details | |
| Mass | 0.82±0.02 M☉ |
| Radius | 0.78±0.02 R☉ |
| Luminosity | 0.32±0.01 L☉ |
| Luminosity (bolometric) | 0.4786 L☉ |
| Surface gravity (log g) | 4.57±0.03 cgs |
| Temperature | 4,948±25 K |
| Metallicity [Fe/H] | 0.10±0.07 dex |
| Age | 6.9±4.2 Gyr |
| Other designations | |
| Solaris, AG+14 2370, BD+14 4559, HIP 104780, PPM 139779, LTT 16221 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
BD+14 4559 is a star with an exoplanetary companion in the northern constellation of Pegasus. During the 2019 NameExoWorlds campaign, the star was named Solaris by Poland after a 1961 science fiction novel about an ocean-covered exoplanet by Polish writer Stanisław Lem. With an apparent visual magnitude of 9.78, the star is too faint to be viewed with the naked eye. The system is located at a distance of 161 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −44 km/s. It is a high proper motion star, traversing the celestial sphere at an angular rate of 0.234″ yr−1.
This is an ordinary K-type main sequence star with a stellar classification of K2V. The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun. The star is radiating 48% of the net luminosity of the Sun from its photosphere at an effective temperature of 4,948 K. It has a higher metallicity – the abundance of elements of higher atomic number than helium – compared to the Sun.