| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus[2] |
| Right ascension | 00h06m 43.19732s[3] |
| Declination | −07° 32′ 17.0191″[3] |
| Apparent magnitude (V) | 13.837±0.003[4] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | M5.5V[4] |
| Apparent magnitude (V) | 13.837±0.003[4] |
| Apparent magnitude (G) | 11.774±0.003[3] |
| Apparent magnitude (J) | 8.323±0.019[4] |
| Apparent magnitude (H) | 7.792±0.034[5] |
| Apparent magnitude (K) | 7.439±0.021[5] |
| Astrometry | |
| Radial velocity (Rv) | −40.46±0.30[3] km/s |
| Proper motion (μ) | RA: −811.566 mas/yr[3] Dec.: −1893.251 mas/yr[3] |
| Parallax (π) | 206.3500 ± 0.0474 mas[3] |
| Distance | 15.806 ± 0.004 ly (4.846 ± 0.001 pc) |
| Details[4] | |
| Mass | 0.120±0.010 M☉ |
| Radius | 0.137±0.005 R☉ |
| Luminosity (bolometric) | 0.001406±0.000019 L☉ |
| Surface gravity (log g) | 5.10±0.06 cgs |
| Temperature | 3024±52 K |
| Metallicity [Fe/H] | −0.25±0.19 dex |
| Rotation | 126±15 d |
| Other designations | |
NSV 15022, GJ 1002, G 158-27, LHS 2, NLTT 248, PLX 9.01, PM 00042-0747, TIC 176287658, 2MASS J00064325-0732147[5] | |
| Database references | |
| SIMBAD | data |
GJ 1002 (or Gliese 1002) is a nearby red dwarf star, located 15.8 light-years (4.8 parsecs) away from the Solar System in the constellation of Cetus. The star has 12% the mass and 14% the radius of the Sun, and a temperature of 3,024 K (2,751 °C; 4,984 °F). It hosts a system of two known exoplanets.[4]
Two planetary companions to GJ 1002 were discovered in 2022 via radial velocity. Both have minimum masses close to that of Earth and orbit within the habitable zone of their star. While these planets do not transit their host star, it may be possible to determine the presence and composition of atmospheres with future instruments such as the ANDES spectrograph for the Extremely Large Telescope.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.08±0.13 M🜨 | 0.0457±0.0013 | 10.3465±0.027 | — | — | — |
| c | ≥1.36±0.17 M🜨 | 0.0738±0.0021 | 21.202±0.013 | — | — | — |
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