HD 25171
HD 25171 is a star with an orbiting exoplanet in the southern constellation of Reticulum, the reticle. With an apparent visual magnitude of 7.79, this star is too faint to be viewed with the naked eye. However, it is readily visible through a small telescope from the southern hemisphere. Parallax measurements place it at a distance of roughly 182 light-years (56 parsecs) from Earth. It is drifting further away with a heliocentric radial velocity of +43 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 55m 49.440s |
| Declination | –65° 11′ 12.03″ |
| Apparent magnitude (V) | 7.79 |
| Characteristics | |
| Spectral type | F8 V |
| B−V color index | 0.554 |
| Astrometry | |
| Radial velocity (Rv) | +42.8 km/s |
| Proper motion (μ) | RA: +144.020 mas/yr Dec.: +81.550 mas/yr |
| Parallax (π) | 17.928 ± 0.0163 mas |
| Distance | 181.9 ± 0.2 ly (55.78 ± 0.05 pc) |
| Absolute magnitude (MV) | 4.09±0.07 |
| Details | |
| Mass | 1.09±0.03 M☉ |
| Radius | 1.069±0.041 R☉ |
| Luminosity | 1.89 L☉ |
| Surface gravity (log g) | 4.17±0.1 cgs |
| Temperature | 6,063±50 K |
| Metallicity [Fe/H] | −0.11±0.04 dex |
| Rotation | 14.4±0.6 d |
| Rotational velocity (v sin i) | 1.0 km/s |
| Age | 4.0±1.6 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Based upon its spectrum, this is an ordinary F-type main sequence star with a stellar classification of F8 V. It is slightly larger than the Sun, with 9% more mass and an 7% greater radius. As such, it is radiating 189% of the Sun's luminosity from its outer atmosphere at an effective temperature of 6,063 K. This gives it the yellow-white hued glow of an F-type star. It appears to be roughly the same age as the Sun; around four billion years.
A survey in 2015 ruled out the existence of any stellar companions at projected distances above 26 astronomical units.