Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Tucana [1] |
Right ascension | 23h 20m 07.52452s [2] |
Declination | −60° 03′ 54.6447″ [2] |
Apparent magnitude (V) | 11.02±0.06 [3] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | M1V [3] |
Apparent magnitude (B) | 12.45±0.19 [3] |
Apparent magnitude (V) | 11.02±0.06 [3] |
Apparent magnitude (G) | 10.237±0.003 [2] |
Apparent magnitude (J) | 7.941±0.019 [3] |
Apparent magnitude (H) | 7.320±0.053 [3] |
Apparent magnitude (K) | 7.082±0.031 [3] |
Astrometry | |
Radial velocity (Rv) | 29.44±0.21 [2] km/s |
Proper motion (μ) |
RA: −319.924
mas/
yr
[2] Dec.: −127.782 mas/ yr [2] |
Parallax (π) | 39.7113 ± 0.0244 mas [2] |
Distance | 82.13 ± 0.05
ly (25.18 ± 0.02 pc) |
Details [3] | |
Mass | 0.62±0.03 M☉ |
Radius | 0.600±0.022 R☉ |
Luminosity (bolometric) | 0.0673±0.0024 L☉ |
Surface gravity (log g) | 4.04±0.49 cgs |
Temperature | 3800±70 K |
Metallicity [Fe/H] | 0.04±0.17 dex |
Rotation | 29.8±1.3 d |
Other designations | |
Database references | |
SIMBAD | data |
L 168-9 (also known as GJ 4332 or TOI-134, officially named Danfeng) is a red dwarf star located 82.1 light-years (25.2 parsecs) away from the Solar System in the constellation of Tucana. The star has about 62% the mass and 60% the radius of the Sun. It has a temperature of 3,800 K (3,530 °C; 6,380 °F) and a rotation period of 29.8 days. L 168-9 is orbited by one known exoplanet. [3]
The designation L 168-9 comes from Luyten's first catalogue of stars with high proper motion.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [5] The approved names, proposed by a team from China, were announced in June 2023. L 168-9 is named Danfeng and its planet is named Qingluan, after mythological birds of ancient China. [6]
The exoplanet L 168-9 b, officially named Qingluan, was discovered in 2020 using TESS. It is a terrestrial super-Earth with about 4.6 times the mass and 1.39 times the radius of Earth, and an estimated equilibrium temperature of 965 K (692 °C; 1,277 °F). L 168-9 b is a target for observation and atmospheric characterization with the James Webb Space Telescope, [3] and has been observed as one of its first targets. [7] [8]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Qingluan | 4.60±0.56 M🜨 | 0.02091±0.00024 | 1.40150±0.00018 | <0.21 | 85.5+0.8 −0.7 ° |
1.39±0.09 R🜨 |