Gliese 876

Gliese 876 ( lat. Gliese 876 ) is a single star in the constellation Aquarius , also called IL Aquarius. Located at a distance of 15.2 St. years from the sun .

Gliese 876
Star
Gliese system 876 in the artist's view
Observational data ( Epoch J2000.0 )
Right ascension
Declination
Distance	15.3 ± 0.1 St. years (4.7 ± 0.04 pc )
Visible magnitude ( V )	10.18
Constellation	Aquarius
Astrometry
Radial velocity ( R v )	-1.7 km / s
Own movement (μ)	RA: 960.33 mas per year Dec: -675.64 mas per year
Parallax (π)	212.59 ± 1.96 mas
Absolute magnitude (V)	11.82
Specifications
Spectral class	M3.5V
Color Index ( B - V )	1,59
Color Index ( U - B )	1.15
Variability	BY Dra
physical characteristics
Weight	0.32 ± 0.03 M ☉
Radius	0,36 R ☉
Age	9.9⋅10 9 years
Temperature	3480 ± 50 K
Luminosity	0.0124 L ☉
Metallicity	75% solar
Rotation	96.7 days
Other designations IL Aquarii, Ross 780, G 156-057, BD -15 ° 6290, GCTP 5546.00, LHS 530, Vys 337, HIP 113020
Information in databases
SIMBAD	data

The first red dwarf to have discovered a planetary system . Probably massive giant planets are generally atypical for such stars. The orbits of the planets b , c and e are in resonance 1: 2: 4. Planet d is one of the lightest exoplanets found in normal stars. The perturbations of the orbits of the giant planets caused by the mutual gravitational influence made it possible to determine the angle of inclination of the orbits to the line of sight ~ 50 °.