Astronomy:Gliese 48
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | 01h 02m 32.23543s[2] |
| Declination | +71° 40′ 47.3363″[2] |
| Apparent magnitude (V) | 10.2[3] |
| Characteristics | |
| Evolutionary stage | Red dwarf |
| Spectral type | M3.5V[3] |
| Astrometry | |
| Radial velocity (Rv) | +1.34±0.15[2] km/s |
| Proper motion (μ) | RA: +1,746.701[2] mas/yr Dec.: −381.762[2] mas/yr |
| Parallax (π) | 121.4598 ± 0.0158[2] mas |
| Distance | 26.853 ± 0.003 ly (8.233 ± 0.001 pc) |
| Details[4] | |
| Mass | 0.470±0.010[3] M☉ |
| Radius | 0.463±0.010[3] R☉ |
| Luminosity | −1.56+0.04 −0.04[3] L☉ |
| Temperature | 3450±50[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | 48 data |
Gliese 48 (also known as Ross 318) is a red dwarf star located in the constellation Cassiopeia. Visually, it is located between 31 Cassiopeiae and 23 Cassiopeiae. Due to its apparent magnitude, it is not visible to the naked eye.
Physical characteristics
Gliese 48 is a red dwarf of spectral type M3.5V. Much dimmer than the Sun, its luminosity is approximately 2.7% of the solar luminosity. It has a mass of approximately 0.47 solar masses and a radius of approximately 0.46 solar radii. Its effective temperature is estimated at 3450 K. The star shows metallic content consistent with solar levels and may exhibit flare activity.
Planetary system
The star hosts the planet Gliese 48 b, a super-Earth discovered through a combined analysis of radial velocity data (CARMENES and HIRES) and TESS photometry.[3][4] The planet orbits the star in approximately 39.6 days and lies within the optimistic habitable zone of the system.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 8.11±1.63 M⊕ | 0.1752±0.0011 | 39.6299±0.2900 | 0 (fixed) | <89.3° | — |
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Conzo, G.; Moriconi, M.; CorrêaJr., S. A. (2026). "DETECTION AND CHARACTERIZATION OF THE TEMPERATE SUPER-EARTH GLIESE 48 B". Open European Journal on Variable stars (273): 1–18. doi:10.5817/OEJV2026-0273. https://oejv.physics.muni.cz/issues/oejv_0273.pdf.
- ↑ 4.0 4.1 4.2 "Gliese 48 Overview". NASA Exoplanet Archive. https://exoplanetarchive.ipac.caltech.edu/overview/Gliese%2048.
- ↑ "Ross 318". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Ross+318.
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