L 98-59
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Volans |
| Right ascension | 08h 18m 07.62s[1] |
| Declination | −68° 18′ 46.8″ |
| Apparent magnitude (V) | 11.69±0.05[2] |
| Characteristics | |
| Evolutionary stage | Red dwarf (main sequence) |
| Spectral type | M3V |
| B−V colour index | +1.53[2] |
| R−I colour index | +1.28[2] |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | –5.83 km/s |
| Proper motion (μ) | RA: 94,767 mas/yr Dec.: –340.67 mas/yr |
| Parallax (π) | 94.139 mas |
| Distance | 34.6 ly (10.5 pc) |
| Details[3] | |
| Mass | 0.312±0.031 M☉ |
| Radius | 0.314±0.014 R☉ |
| Surface gravity (log g) | 4.94±0.06 cgs |
| Temperature | 3412±49 K |
| Metallicity [Fe/H] | –0.5±0.5 dex |
| Rotation | 78±13 d |
| Age | >1 Gyr |
| Other designations | |
2MASS J08180763-6818468, TOI-175, TYC 9193-2365-1, Gaia DR2 5271055243163629056 | |
| Database references | |
| SIMBAD | data |
L 98-59 (TOI-175, TIC 307210830) is a bright M dwarf star, located in the constellation of Volans, at a distance of 10.623 ± 0.003 parsecs, or 34.648 ± 0.01 light-years, as measured by Gaia.[3]
Broadband photometry shows that it is an M3 dwarf star with four confirmed terrestrial-sized planets in transit, which were announced in March 2019 by TESS.[4][5]
In August 2021, new evidence was announced for a fifth, potentially habitable planet, labeled L 98-59 f. Though still unconfirmed,[6] this planet is believed to have 2.46 times Earth's mass, and an orbital period of 23.15 days.[7][8]
Planetary system[]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.40+0.16 −0.15 M |