Gliese 146
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Horologium |
| Right ascension | 03h 35m 00.93995s[1] |
| Declination | −48° 25′ 08.9046″[1] |
| Apparent magnitude (V) | 8.64[2] |
| Characteristics | |
| Evolutionary stage | Main Sequence[3] |
| Spectral type | K6.5V[3] |
| U−B color index | +1.24[2] |
| B−V color index | +1.30[2] |
| Variable type | suspected, range 8.57 to 8.7 mag, NSV 1203[4][5] |
| Astrometry | |
| Radial velocity (Rv) | +19.5[6] km/s |
| Proper motion (μ) | RA: 404.71[1] mas/yr Dec.: 308.13[1] mas/yr |
| Parallax (π) | 73.520 ± 0.016[7] mas |
| Distance | 44.363 ± 0.010 ly (13.602 ± 0.003 pc) |
| Details[7] | |
| Mass | 0.684±0.013 M☉ |
| Radius | 0.674±0.020 R☉ |
| Luminosity | 0.121[8] L☉ |
| Surface gravity (log g) | 4.69±0.05 cgs |
| Temperature | 4385±21 K |
| Metallicity [Fe/H] | -0.08±0.02 dex |
| Rotation | 34.99+0.58 −0.53 |
| Age | 970[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 146 is a K5V class star located in the constellation Horologium. At 44.4 light years, GJ 146 has an apparent magnitude of +8.57. Gliese 146 is also known as HD 22496, HIP 16711, SAO-216392, and LHS 1563.[10]
Its speed relative to the sun is 38.1 km/second, and its galactic orbit ranges between 20,800 and 25,400 light years from the center of the Galaxy, placing it within a thin disk.[7] It is a suspected variable star.[4][5] It belongs to the Hyades supercluster of stars[11] It is one of 155 K-type stars within 50 light years.[10]
Gliese 146 is a flare star, with average flare frequency 0.23 flares per day.[12]
Planetary system[]
It is one of 500 stars selected in 2009 for the SCUBA-2 All Sky Survey for stars with debris disks.[13] The debris disk was not detected by any survey as in 2015 though.[8]
In 2021, a Sub-Neptune planet HD 22496b was discovered utilizing a Doppler spectroscopy method.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| HD 22496b | >5.57+0.73 −0.68, <16 M |