Gliese 876 information

Gliese 876
	Location of Gliese 876 in Aquarius (red dot)
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Aquarius
Pronunciation	/ˈɡliːzə/
Right ascension	22h 53m 16.73258s
Declination	−14° 15′ 49.3041″
Apparent magnitude (V)	10.1920(17)
Characteristics
Spectral type	M4V
Apparent magnitude (J)	5.934(19)
Apparent magnitude (H)	5.349(49)
Apparent magnitude (K)	5.010(21)
Variable type	BY Draconis
Astrometry
Radial velocity (Rv)	−2.09±0.15 km/s
Proper motion (μ)	RA: 957.715(41) mas/yr ; Dec.: −673.601(31) mas/yr
Parallax (π)	214.0380 ± 0.0356 mas
Distance	15.238 ± 0.003 ly ; (4.6721 ± 0.0008 pc)
Absolute magnitude (MV)	11.81
Details
Mass	0.346±0.007 M☉
Radius	0.372±0.004 R☉
Luminosity	0.01309±0.00011 L☉
Surface gravity (log g)	4.89 cgs
Temperature	3,201+20; −19 K
Metallicity [Fe/H]	+0.19±0.17 dex
Rotation	83.7±2.9 d
Rotational velocity (v sin i)	0.16 km/s
Age	0.1–9.9 Gyr
Other designations
	IL Aquarii, BD−15°6290, Gaia DR3 2603090003484152064, HIP 113020, G 156-057, LHS 530, Ross 780
Database references
SIMBAD	Gliese 876
	d
	c
	b
	e
Exoplanet Archive	data
ARICNS	data

Gliese 876 is a red dwarf star 15.2 light-years (4.7 parsecs) away from Earth in the constellation of Aquarius. It is one of the closest known stars to the Sun confirmed to possess a planetary system with more than two planets, after GJ 1061, YZ Ceti, Tau Ceti, and Wolf 1061; as of 2018, four extrasolar planets have been found to orbit the star. The planetary system is also notable for the orbital properties of its planets. It is the only known system of orbital companions to exhibit a near-triple conjunction in the rare phenomenon of Laplace resonance (a type of resonance first noted in Jupiter's inner three Galilean moons). It is also the first extrasolar system around a normal star with measured coplanarity. While planets b and c are located in the system's habitable zone, they are giant planets believed to be analogous to Jupiter.

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Observation data Epoch J2000.0 Equinox J2000.0
Location of Gliese 876 in Aquarius (red dot)
Constellation	Aquarius
Pronunciation	/ˈɡliːzə/
Right ascension	22^h 53^m 16.73258^s^[1]
Declination	−14° 15′ 49.3041″^[1]
Apparent magnitude (V)	10.1920(17)^[2]
Characteristics
Spectral type	M4V^[3]
Apparent magnitude (J)	5.934(19)^[4]
Apparent magnitude (H)	5.349(49)^[4]
Apparent magnitude (K)	5.010(21)^[4]
Variable type	BY Draconis^[5]
Astrometry

Radial velocity (R_v)	−2.09±0.15^[1] km/s
Proper motion (μ)	RA: 957.715(41) mas/yr^[1] Dec.: −673.601(31) mas/yr^[1]
Parallax (π)	214.0380 ± 0.0356 mas^[1]
Distance	15.238 ± 0.003 ly (4.6721 ± 0.0008 pc)
Absolute magnitude (M_V)	11.81^[6]

Details

Mass	0.346±0.007^[7] `M`_☉
Radius	0.372±0.004^[7] `R`_☉
Luminosity	0.01309±0.00011^[7] `L`_☉
Surface gravity (log g)	4.89^[8] cgs
Temperature	3,201+20 −19^[7] K
Metallicity [Fe/H]	+0.19±0.17^[9] dex
Rotation	83.7±2.9 d^[10]
Rotational velocity (v sin i)	0.16^[11] km/s
Age	0.1–9.9^[11]^[12] Gyr

Other designations
IL Aquarii, BD−15°6290, Gaia DR3 2603090003484152064, HIP 113020, G 156-057, LHS 530, Ross 780^[13]
Database references
SIMBAD	Gliese 876
	d
	c
	b
	e
Exoplanet Archive	data
ARICNS	data

Gliese 876 information

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