HD 86226
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 09h 56m 29.84418s[1] |
| Declination | –24° 05′ 57.7958″[1] |
| Apparent magnitude (V) | 7.93[2] |
| Characteristics | |
| Spectral type | G2V[3] |
| Apparent magnitude (B) | 8.577[1] |
| Apparent magnitude (R) | 7.71[1] |
| Apparent magnitude (J) | 6.839±0.019[1] |
| Apparent magnitude (H) | 6.577±0.034[1] |
| Apparent magnitude (K) | 6.463±0.023[1] |
| B−V color index | 0.647±0.014[1] |
| V−R color index | 0.22[1] |
| Astrometry | |
| Radial velocity (Rv) | +19.56±0.19[1] km/s |
| Proper motion (μ) | RA: –177.111[1] mas/yr Dec.: +46.867[1] mas/yr |
| Parallax (π) | 21.8612 ± 0.0499[1] mas |
| Distance | 149.2 ± 0.3 ly (45.7 ± 0.1 pc) |
| Absolute magnitude (MV) | 4.66[1] |
| Details[4] | |
| 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 |
| Age | 4.6+3.7 −2.7 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 86226 is a G type yellowish white star found in the constellation of Hydra.
A survey in 2015 has ruled out the existence of any stellar companions at projected distances above 12 astronomical units.[6]
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.[7]
Planetary system[]
Due to the periodic spectrum shifts when it had when placed under a Doppler test, 13 Magellan Doppler Velocity observations were made of an object found near the star. The object discovered in 2010 had a Keplerian orbit, was declared an exoplanet and dubbed HD 86226 b.[8]
A hot Super-Earth planet called HD 86226 c was also discovered in 2020.[4] It may be undergoing considerable atmospheric mass loss.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| c | 7.25+1.19 −1.12 M |