Gliese 900
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 23h 35m 00.27674s |
| Declination | +01° 36′ 19.4347″ |
| Apparent magnitude (V) | 9.546 |
| Characteristics | |
| A | |
| Evolutionary stage | Main sequence |
| Spectral type | K5-7 |
| B−V color index | 1.35 |
| B | |
| Evolutionary stage | Main sequence |
| Spectral type | M3-4 |
| C | |
| Evolutionary stage | Main sequence |
| Spectral type | M5-6 |
| Astrometry | |
| Radial velocity (Rv) | −10.44±0.44 km/s |
| Proper motion (μ) | RA: 340.029 mas/yr Dec.: 28.456 mas/yr |
| Parallax (π) | 47.9641±0.0236 mas |
| Distance | 68.00 ± 0.03 ly (20.85 ± 0.01 pc) |
| Absolute magnitude (MV) | 7.95 |
| Details | |
| A | |
| Mass | 0.64 – 0.67 M☉ |
| Radius | 0.716±0.021 R☉ |
| Luminosity | 0.12±0.005 L☉ |
| Temperature | 4,079±180 K |
| Metallicity [Fe/H] | 0.02 dex |
| Rotation | 11.9 days |
| Age | 200±50 Myr |
| B | |
| Mass | 0.28 – 0.34 M☉ |
| C | |
| Mass | 0.16 – 0.24 M☉ |
| Orbit | |
| Primary | A |
| Companion | BC |
| Period (P) | ≈80 yr |
| Orbit | |
| Primary | B |
| Companion | C |
| Period (P) | 36 yr |
| Semi-major axis (a) | 444 mas (9.217 AU) |
| Eccentricity (e) | 0.136 |
| Inclination (i) | 82.21° |
| Argument of periastron (ω) (secondary) | 109.8° |
| Position (relative to A) | |
| Epoch of observation | December 2006 |
| Angular distance | 751 (A–B) 708 (A–C) 51 (B–C) mas |
| Position angle | 342.5 (A–B) 344.7 (A–C) 130.3 (B–C)° |
| Other designations | |
| BD+00 5017, GJ 900, HIP 116384, WDS J23350+0136A,BC, G 29-47 / 157-46, LSPM J2235+0136, TIC 422618003, TYC 585-236-1, GSC 00585-00236, 2MASS J23350028+0136193, WISE J233500.50+013619.7 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Gliese 900 (GJ 900, BD+00 5017) is a triple star system, located 68 light-years from Earth in the constellation Pisces. It is made up of three main sequence stars: one is a K-type star, the two others are M-dwarf stars. The two M-dwarfs form a binary system with a period of 36 years, and this system has a period of 80 years around the primary component. With an apparent magnitude of 9.546, Gliese 900 is not visible to the naked eye. A widely separated planet has been detected around the system.