HD 125595
HD 125595 is a star with a close Neptunian companion in the southern constellation of Centaurus. With an apparent visual magnitude of 9.03, this star is too faint to be viewed with the naked eye. It is located at a distance of 92 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of +4.5 km/s. The star has a high proper motion, traversing the celestial sphere and an angular rate of 0.57 arcsecond yr−1.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 21m 23.186s |
| Declination | −40° 23′ 38.22″ |
| Apparent magnitude (V) | 9.03 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | K4V(k) |
| Apparent magnitude (B) | 10.137 |
| Apparent magnitude (J) | 7.097±0.021 |
| Apparent magnitude (H) | 6.608±0.026 |
| Apparent magnitude (K) | 6.447±0.023 |
| B−V color index | 1.107±0.006 |
| Astrometry | |
| Radial velocity (Rv) | +4.48±0.45 km/s |
| Proper motion (μ) | RA: −561.636 mas/yr Dec.: −68.516 mas/yr |
| Parallax (π) | 35.4337 ± 0.0762 mas |
| Distance | 92.0 ± 0.2 ly (28.22 ± 0.06 pc) |
| Absolute magnitude (MV) | 6.80 |
| Details | |
| Mass | 0.77 M☉ |
| Radius | 0.73+0.02 −0.03 R☉ |
| Luminosity | 0.241 L☉ |
| Surface gravity (log g) | 4.58 cgs |
| Temperature | 4,672 K |
| Metallicity [Fe/H] | 0.13 dex |
| Rotation | 37.2±2.0 d |
| Rotational velocity (v sin i) | 1.50 km/s |
| Age | 8.17 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is an ordinary K-type main-sequence star with a stellar classification of K4V(k), which indicates it is a small star that is generating energy at its core through hydrogen fusion. It is about eight billion years old and is spinning with a projected rotational velocity of 1.5 km/s, giving it a 37 day rotation period. The star shows a moderate level of chromospherically activity due to star spots or plagues. It is smaller, cooler, dimmer, and less massive than the Sun, but shows a higher atmospheric metallicity.