HD 169142
HD 169142 is a single Herbig Ae/Be star. Its surface temperature is 7650±150 K. HD 169142 is depleted of heavy elements compared to the Sun, with a metallicity Fe/H index of −0.375±0.125, but is much younger at an age of 7.5±4.5 million years. The star is rotating slowly and has relatively low stellar activity for a Herbig Ae/Be star.
VLT/SPHERE image of the circumstellar disk and protoplanet candidate b around HD 169142. Credit: ESO VLT/SPHERE - Monash University - Iain Hammond et al., adapted and mixed by Meli_thev | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 24m 29.7800s |
| Declination | −29° 46′ 49.3286″ |
| Apparent magnitude (V) | 8.16 |
| Characteristics | |
| Evolutionary stage | Herbig Ae/Be star |
| Spectral type | A9III/IVe |
| Astrometry | |
| Radial velocity (Rv) | −3±2 km/s |
| Proper motion (μ) | RA: −2.335 mas/yr Dec.: −37.879 mas/yr |
| Parallax (π) | 8.7053 ± 0.0268 mas |
| Distance | 375 ± 1 ly (114.9 ± 0.4 pc) |
| Details | |
| Mass | 1.65 M☉ |
| Radius | 1.6 R☉ |
| Luminosity | 8.6 L☉ |
| Surface gravity (log g) | 4.05±0.05 cgs |
| Temperature | 7650±150 K |
| Metallicity [Fe/H] | −0.375±0.125 dex |
| Rotational velocity (v sin i) | 55±5 km/s |
| Age | 7.5±4.5 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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