EZ_Aquarii

EZ Aquarii

**EZ Aquarii**
Observation data Epoch J2000 Equinox J2000
Image:EZ Aquarii.jpg EZ Aquarii
Constellation	Aquarius
Right ascension	22h 38m 33.4s
Declination	-15° 18' 07"
Apparent magnitude (V)	12.87
Characteristics
Spectral type	M5 V
U-B color index	1.50
B-V color index	1.99
R-I color index	10.64
Variable type	Flare star
Astrometry
Radial velocity (R_v)	-59.9 km/s
Proper motion (μ)	RA: 2364 mas/yr Dec.: 2236 mas/yr
Parallax (π)	289.50 ± 4.40 mas
Distance	11.3 ± 0.2 ly (3.45 ± 0.05 pc)
Absolute magnitude (M_V)	14.68
Details

Mass	0,11 M_☉
Radius	0,5 R_☉
Luminosity	0,0000484 L_☉
Temperature	2,000–3,500 K
Metallicity	?
Rotation	?
Age	? years

Orbit
Companion	EZ Aquarii B
Period (P)	2.25 yr
Semimajor axis (a)	0.346"
Eccentricity (e)	0.44
Inclination (i)	112.4°
Longitude of the node (Ω)	162.1°
Periastron epoch (T)	1987.24
Orbit
Companion	EZ Aquarii C
Period (P)	? yr
Semimajor axis (a)	?"
Eccentricity (e)	?
Inclination (i)	?°
Longitude of the node (Ω)	?°
Periastron epoch (T)	?
Other designations
Luyten 789-6, GCTP 5475.00, LHS 68, GJ 866 A, G 156-031.
Database references
SIMBAD	data
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

EZ Aquarii is a triple star system approximately 3.4 pc or 11.3 light-years from the Sun, in the constellation Aquarius. It is also known as Luyten 789-6. All three components are M-type red dwarfs. The main component is also a spectroscopic binary.

The nearest neighbouring star is Lacaille 9352, 1.29 pc or 4.21 ly away.

Aquarius Constellation

Nearby Stars, 14ly Radius

Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
EZ Aquarii B (GJ 866 B)	22^h 38^m 00^s	-15° 18' 00	12.33	M5e	Simbad
EZ Aquarii C (GJ 866 C)	22^h 38^m 37.25^s	-15° 17' 07.1			Simbad

van Maanen, A., "Preliminary Parallaxes of Luyten 789-6 and Wolf 424", 12/1939, Publications of the Astronomical Society of the Pacific, Vol. 51, No. 304.
Woitas, J.; Leinert, Ch.; Jahreiß, H.; Henry, T.; Franz, O. G.; Wasserman, L. H., "The nearby M-dwarf system Gliese 866 revisited", 1/2000, Astronomy and Astrophysics, v. 353.
THE ONE HUNDRED NEAREST STAR SYSTEMS

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