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.[7]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Gliese 900
Gliese 900 imaged by WISE, with the planetary-mass companion circled |
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Pisces[lower-alpha 1] |
Right ascension |
23h 35m 00.27674s[1] |
Declination |
+01° 36′ 19.4347″[1] |
Apparent magnitude (V) |
9.546[1] |
Characteristics |
A |
Evolutionary stage |
Main sequence |
Spectral type |
K5-7[2] |
Apparent magnitude (I) |
6.66±0.08[2] |
Apparent magnitude (K) |
4.84±0.08[2] |
B−V color index |
1.35[3] |
|
B |
Evolutionary stage |
Main sequence |
Spectral type |
M3-4[2] |
Apparent magnitude (I) |
9.15±0.11[2] |
Apparent magnitude (K) |
6.76±0.2[2] |
C |
Evolutionary stage |
Main sequence |
Spectral type |
M5-6[2] |
Apparent magnitude (I) |
10.08±0.26[2] |
Apparent magnitude (K) |
7.39±0.01[2] |
Astrometry |
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|
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Radial velocity (Rv) | −10.44±0.44[4] km/s |
Proper motion (μ) | RA: 340.029 mas/yr[4] Dec.: 28.456 mas/yr[4] |
Parallax (π) | 47.9641 ± 0.0236 mas[4] |
Distance | 68.00 ± 0.03 ly (20.85 ± 0.01 pc) |
Absolute magnitude (MV) | 7.95[lower-alpha 2] |
|
Details |
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A |
---|
Mass | 0.64 – 0.67[2] M☉ |
Radius | 0.716±0.021[5] R☉ |
Luminosity | 0.12±0.005[4] L☉ |
Temperature | 4,079±180[2] K |
Metallicity [Fe/H] | 0.02[6] dex |
Rotation | 11.9[7] days |
Age | 200±50[7] Myr |
|
|
---|
B |
---|
Mass | 0.28 – 0.34[2] M☉ |
C |
---|
Mass | 0.16 – 0.24[2] M☉ |
Orbit |
---|
Primary | A |
Companion | BC |
Period (P) | ≈80[2] yr |
Orbit[6] |
---|
Primary | B |
Companion | C |
Period (P) | 36 yr |
Semi-major axis (a) | 444 mas (9.217 AU)[lower-alpha 3] |
Eccentricity (e) | 0.136 |
Inclination (i) | 82.21° |
Argument of periastron (ω) (secondary) | 109.8° |
Position (relative to A)[2] |
|
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 |
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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 |
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SIMBAD | data |
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