Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Carina |
Right ascension | 09h 42m 46.3420s[1] |
Declination | −68° 53′ 06.004″[1] |
Apparent magnitude (V) | 12.78[2] |
Characteristics | |
Spectral type | M4.0V[3] |
Astrometry | |
Proper motion (μ) | RA: −75.523[1] mas/yr Dec.: 1128.513[1] mas/yr |
Parallax (π) | 153.7593 ± 0.0249 mas[4] |
Distance | 21.212 ± 0.003 ly (6.504 ± 0.001 pc) |
Absolute magnitude (MV) | 13.715[2] |
Details | |
Mass | 0.175[5] M☉ |
Radius | 0.190[2] R☉ |
Luminosity | 0.0043[6] L☉ |
Surface gravity (log g) | 5.03[6] cgs |
Temperature | 3144[2] K |
Metallicity [Fe/H] | 0.09[2] dex |
Other designations | |
Database references | |
SIMBAD | data |
GJ 1128 is a red dwarf star of spectral type M4.0V, located in constellation Carina 21 light-years away from Earth. It is one of the closer stars to the Sun.
The discovery designation of GJ 1128 is L 100-115,[10] related to time period 1942–1944.[11] The small distance from Sun to the GJ 1128 was recognized in 2005.[12]
GJ 1128 is a long-term variable with the prominent 5-year starspot cycle comparable to that of Sun`s.[12]