Gliese 393
Gliese 393 is a red dwarf star in the constellation Sextans. At apparent magnitude 9.65, it is much too faint to be seen with the unaided eye. A small star, it has around 41% the mass and radius of the Sun, but only 2.35% its luminosity.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sextans |
| Right ascension | 10h 28m 55.55087s |
| Declination | +00° 50′ 27.6218″ |
| Apparent magnitude (V) | 9.65 |
| Characteristics | |
| Spectral type | M2.5V |
| Astrometry | |
| Radial velocity (Rv) | -8.34 ± 0.1 km/s |
| Proper motion (μ) | RA: 603.75 ± 1.90 mas/yr Dec.: -728.94 ± 2.04 mas/yr |
| Parallax (π) | 141.50 ± 2.22 mas |
| Distance | 23.0 ± 0.4 ly (7.1 ± 0.1 pc) |
| Details | |
| Mass | 0.41[1] M☉ |
| Radius | 0.41[1] R☉ |
| Luminosity | 0.0235[1] L☉ |
| Temperature | 3544 ± 68[1] K |
| Metallicity | -0.11 ± 0.04[1] |
| Other designations | |
HIP 51317, LTT 12805 | |
| Database references | |
| SIMBAD | data |
Planetary System
In 2019 one candidate planet been detected by the radial velocity method.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.9+1.1 −1.0 M⊕ |
0.055+0.005 −0.006 |
7.0269+0.0034 −0.0041 |
0.03+0.21 −0.03 |
— | — |
References
- Maldonado, J.; Affer, L.; Micela, G.; Scandariato, G.; Damasso, M.; Stelzer, B.; Barbieri, M.; Bedin, L. R.; Biazzo, K.; Bignamini, A.; Borsa, F.; Claudi, R. U.; Covino, E.; Desidera, S.; Esposito, M.; Gratton, R.; González Hernández, J. I.; Lanza, A. F.; Maggio, A.; Molinari, E.; Pagano, I.; Perger, M.; Pillitteri, I.; Piotto, G.; Poretti, E.; Prisinzano, L.; Rebolo, R.; Ribas, I.; Shkolnik, E.; Southworth, J.; Sozzetti, A.; Suárez Mascareño, A. (2015). "Stellar parameters of early-M dwarfs from ratios of spectral features at optical wavelengths". Astronomy & Astrophysics. 577: 13. arXiv:1503.03010. Bibcode:2015A&A...577A.132M. doi:10.1051/0004-6361/201525797. A132.
- Barnes, J. R.; et al. (2019-06-11). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644.
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