GJ 1005
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 00h 15m 28.11090s |
| Declination | −16° 08′ 01.6303″ |
| Apparent magnitude (V) | 11.483 |
| Characteristics | |
| Spectral type | M3.5V |
| Astrometry | |
| Radial velocity (Rv) | -26.43 ± 0.1 km/s |
| Proper motion (μ) | RA: 731.83 mas/yr Dec.: -607.73 mas/yr |
| Parallax (π) | 166.6±0.3 mas |
| Distance | 19.58 ± 0.04 ly (6.00 ± 0.01 pc) |
| Absolute magnitude (MV) | 12.70 ± 0.01 / 15.12 ± 0.09 |
| Orbit | |
| Period (P) | 4.55726+0.00075 −0.00074 y. |
| Semi-major axis (a) | 0.3037 ± 0.0005″ |
| Eccentricity (e) | 0.36136+0.00097 −0.00098 |
| Inclination (i) | 143.93+0.25 −0.24° |
| Longitude of the node (Ω) | 62.8 ± 0.4° |
| Periastron epoch (T) | JD 2449850.4 ± 0.8 |
| Argument of periastron (ω) (secondary) | 166.6 ± 0.5° |
| Details | |
| GJ 1005 A | |
| Mass | 0.179 ± 0.002 M☉ |
| Temperature | 3341±224 K |
| Metallicity [Fe/H] | -0.41 dex |
| GJ 1005 B | |
| Mass | 0.112 ± 0.001 M☉ |
| Other designations | |
| Gaia DR2 2368293487260807040, HIP 1242, G 158-50, G 266-76, LHS 1047, LP 764-87, LTT 114, 2MASS J00152799-1608008 | |
| Database references | |
| SIMBAD | data |
| ARICNS | A |
| B | |
Location of GJ 1005 in the constellation Cetus | |
GJ 1005 is a system of two red dwarfs, located in constellation Cetus at 19.6 light-years from Earth. The primary star is a M4V class star while the secondary is a class M7V.
The system was observed with the Hubble Space Telescope in the 1990s with its Fine Guidance Sensor. This data helped determine the mass of each of the components of L722-22/ LHS 1047 / GJ 1005.