Gliese 367
Coordinates: 
09h 44m 29.8367s, −45° 46′ 35.4256″
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 44m 29.8367s[1] |
| Declination | −45° 46′ 35.4256″[1] |
| Apparent magnitude (V) | 9.979 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | M1[2] |
| Astrometry | |
| Radial velocity (Rv) | 46.96±0.37[3] km/s |
| Proper motion (μ) | RA: −462.621±0.014[3] mas/yr Dec.: −582.667±0.015[3] mas/yr |
| Parallax (π) | 106.1727 ± 0.0141[3] mas |
| Distance | 30.719 ± 0.004 ly (9.419 ± 0.001 pc) |
| Details[2] | |
| Mass | 0.454±0.011 M☉ |
| Radius | 0.457±0.013 R☉ |
| Luminosity | 0.0288±0.0027 L☉ |
| Surface gravity (log g) | 4.777±0.026 cgs |
| Temperature | 3522±70 K |
| Metallicity [Fe/H] | −0.01±0.12 dex |
| Rotation | 48±2 d |
| Rotational velocity (v sin i) | 0.48±0.02 km/s |
| Age | 8.0+3.8 −4.6 Gyr |
| Other designations | |
CD-45 5378, HIP 47780, 2MASS J09442986-4546351, TOI-731, TYC 8168-2031-1, Gaia DR2 5412250540681250560[1] | |
| Database references | |
| SIMBAD | data |
Gliese 367 (GJ 367) is a red dwarf star 31 light-years (9.5 parsecs) from Earth in the constellation of Vela. It is suspected to be a variable with amplitude 0.012 stellar magnitude and period 5.16 years.[4] A stellar multiplicity survey in 2015 failed to detect any stellar companions to Gliese 367.[5]
Planetary system[]
The star Gliese 367 was observed by TESS in February-March 2019, leading to its designation as an object of interest,[2] and by January 2021 additional radial velocity data suggested the existence of a short-period planet, albeit with low certainty.[6] The planet's existence was confirmed by both ground-based and satellite-based transit photometry data by December 2021.[2]
Gliese 367 b takes just 7.7 hours to orbit its star, one of the shortest orbits of any planet. Due to its close orbit, the exoplanet gets bombarded with radiation over 500 times what Earth receives from the Sun.[2][7] Dayside temperatures on GJ 367b are around 1,500 °C (1,770 K; 2,730 °F).[8] Due to its close orbit, it most likely is tidally locked.[9] The atmosphere of Gliese 367 b, due to the extreme temperatures, would have boiled away along with signs of life.[8] The core of GJ 367b is likely composed of iron and nickel, making its core similar to Mercury's core. The core of GJ 367b is extremely dense, making up most of the planet's mass.[8]
As of 2021, Gliese 367 b is the smallest and least massive known exoplanet within 10 parsecs of the Solar System.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.546±0.078 M
|