HD 108236
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 26m 17.8916s[1] |
| Declination | −51° 21′ 46.2141″[1] |
| Apparent magnitude (V) | 9.24 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | G5V |
| Astrometry | |
| Radial velocity (Rv) | 16.78±0.22[2] km/s |
| Proper motion (μ) | RA: −70.627[2] mas/yr Dec.: −49.758[2] mas/yr |
| Parallax (π) | 15.4861 ± 0.0127[2] mas |
| Distance | 210.6 ± 0.2 ly (64.57 ± 0.05 pc) |
| Details[3] | |
| Mass | 0.869+0.050 −0.048 M☉ |
| Radius | 0.877±0.008 R☉ |
| Luminosity | 0.708±0.047 L☉ |
| Surface gravity (log g) | 4.49±0.11 cgs |
| Temperature | 5660±61 K |
| Metallicity [Fe/H] | −0.28±0.04 dex |
| Age | 6.7+4.0 −5.1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 108236 is a G-type main-sequence star. Its surface temperature is 5660±61 K. HD 108236 is severely depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.28±0.04 (52% of the Solar System), and is probably older than the Sun at 6.7+4.0
−5.1 billion years.[3]
According to WISE mission data, the star was suspected to be surrounded by a debris disk, but a reanalysis of the data rejected the debris disk hypothesis by 2014.[4] The reason for the false positive was contamination from a nearby infrared source.[5]
Planetary system[]
HD 108236's planets
In 2020, four planets orbiting HD 108236 were discovered[6] by the transit method, followed by another one in 2021.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.2±1.2 M
|