Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Reticulum |
Right ascension | 03h 55m 49.440s[1] |
Declination | –65° 11′ 12.03″[1] |
Apparent magnitude (V) | 7.79[2] |
Characteristics | |
Spectral type | F8 V[2] |
B−V color index | 0.554[2] |
Astrometry | |
Radial velocity (Rv) | +42.8[3] km/s |
Proper motion (μ) | RA: +144.020 mas/yr[1] Dec.: +81.550 mas/yr[1] |
Parallax (π) | 17.928 ± 0.0163 mas[4] |
Distance | 181.9 ± 0.2 ly (55.78 ± 0.05 pc) |
Absolute magnitude (MV) | 4.09±0.07[2] |
Details | |
Mass | 1.09±0.03[2] M☉ |
Radius | 1.069±0.041[5] R☉ |
Luminosity | 1.89[2] L☉ |
Surface gravity (log g) | 4.17±0.1[5] cgs |
Temperature | 6,063±50[5] K |
Metallicity [Fe/H] | −0.11±0.04[2] dex |
Rotation | 14.4±0.6 d[6] |
Rotational velocity (v sin i) | 1.0[2] km/s |
Age | 4.0±1.6[2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 25171 is a star with an orbiting exoplanet[8] in the southern constellation of Reticulum, the reticle. With an apparent visual magnitude of 7.79,[2] 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.[3]
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.[5][2]
A survey in 2015 ruled out the existence of any stellar companions at projected distances above 26 astronomical units.[9]
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