HD 86226
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 09h 56m 29.844s |
| Declination | −24° 05′ 57.80″ |
| Apparent magnitude (V) | 7.93 |
| Characteristics | |
| Spectral type | G2V |
| Apparent magnitude (B) | 8.577 |
| Apparent magnitude (R) | 7.71 |
| Apparent magnitude (J) | 6.839±0.019 |
| Apparent magnitude (H) | 6.577±0.034 |
| Apparent magnitude (K) | 6.463±0.023 |
| B−V color index | 0.647±0.014 |
| V−R color index | 0.22 |
| Astrometry | |
| Radial velocity (Rv) | +19.56±0.19 km/s |
| Proper motion (μ) | RA: −177.127 mas/yr Dec.: +47.099 mas/yr |
| Parallax (π) | 21.9301±0.0267 mas |
| Distance | 148.7 ± 0.2 ly (45.60 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.66 |
| Details | |
| Mass | 1.019+0.061 −0.066 M☉ |
| Radius | 1.053+0.026 −0.026 R☉ |
| Luminosity | 1.180+0.036 −0.029 L☉ |
| Surface gravity (log g) | 4.400+0.029 −0.032 cgs |
| Temperature | 5863±88 K |
| Metallicity [Fe/H] | 0.018+0.057 −0.043 dex |
| Rotational velocity (v sin i) | 3.6 km/s |
| Age | 4.6+3.7 −2.7 Gyr |
| Other designations | |
| CD−23°8866, HD 86226, HIP 48739, SAO 178205, PPM 256971 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 86226 is a star with a pair of orbiting exoplanet companions, found in the constellation of Hydra. With an apparent visual magnitude of 7.93, it is too dim to be visible with the naked eye. The distance to this system has been determined by the parallax method, yielding a range of 149 light years. It is receding with a heliocentric radial velocity of +19.6 km/s. A survey in 2015 has ruled out the existence of any stellar companions at projected distances above 12 astronomical units.
This is an ordinary G-type main-sequence star with a stellar classification of G2V. It is similar in size, mass, and composition to the Sun, although it is not considered a solar twin. The age is about the same; roughly 4.6 billion years old. The star is radiating 18% greater luminosity (compared to the Sun) from its photosphere at an effective temperature of 5,863 K. It is spinning with a projected rotational velocity of 3.6 km/s.
As of 2014, Radio emission at a frequency of 150 MHz has been tentatively detected from the proximity of this system, although it is not clear whether the star or a satellite orbiting a rapidly rotating planet is the source.