HD 154345
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17h 02m 36.40381s |
| Declination | +47° 04′ 54.7642″ |
| Apparent magnitude (V) | +6.76 |
| Characteristics | |
| Spectral type | G8V |
| U−B color index | 0.27 |
| B−V color index | 0.728±0.005 |
| Astrometry | |
| Radial velocity (Rv) | −47.08±0.12 km/s |
| Proper motion (μ) | RA: 123.274 mas/yr Dec.: 853.639 mas/yr |
| Parallax (π) | 54.7359±0.0176 mas |
| Distance | 59.59 ± 0.02 ly (18.270 ± 0.006 pc) |
| Absolute magnitude (MV) | +5.41 |
| Details | |
| Mass | 0.89±0.04 M☉ |
| Radius | 0.85±0.01 R☉ |
| Luminosity | 0.620±0.002 L☉ |
| Surface gravity (log g) | 4.53±0.01 cgs |
| Temperature | 5,557±15 K |
| Metallicity [Fe/H] | −0.14±0.04 dex |
| Rotation | 27.8±1.7 d |
| Age | 4.10±1.20 Gyr |
| Other designations | |
| BD+47°2420, GC 23011, GJ 651, HD 154345, HIP 83389, SAO 46452, GCRV 9834 | |
| Database references | |
| SIMBAD | data |
HD 154345 is a star in the northern constellation of Hercules. With an apparent visual magnitude of +6.76 it is a challenge to view with the naked eye, but using binoculars it is an easy target. The distance to this star is 59.6 light years based on parallax, but it is drifting closer with a radial velocity of −47 km/s. At least one exoplanet is orbiting this star.
The stellar classification of HD 154345 is G8V, matching an ordinary G-type main-sequence star that is generating energy by core hydrogen fusion. The magnetic activity cycle of this star is curiously correlated with the radial velocity variations induced by its putative planetary companion. It is around four billion years old and is spinning with a rotation period of 28 days. The star is smaller and less massive than the Sun. It is radiating 62% of the luminosity of the Sun from its photosphere at an effective temperature of 5,557 K.