Mu Aquarii

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**μ Aquarii**
Observation data Epoch J2000
Image:MuAquarii.jpg μ Aquarii
Constellation (pronunciation)	Andromeda
Right ascension	20^h 52^m 39.2336^s
Declination	-08° 58′ 59.944″
Apparent magnitude (V)	4.723
Characteristics
Spectral type	A3m
U-B color index	0.11
B-V color index	0.32
Astrometry
Radial velocity (R_v)	-9.1 km/s
Proper motion (μ)	RA: 47.06 mas/yr Dec.: -32.91 mas/yr
Parallax (π)	21.01 ± 1.04 mas
Distance	155 ± 8 ly (48 ± 2 pc)
Absolute magnitude (M_V)	5.029
Details
Mass	? M_☉
Radius	? R_☉
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	?
Age	? years
Visual binary orbit
Companion	μ Aquarii B
Period (P)	4.8788501 yr
Semimajor axis (a)	0.1"
Inclination (i)	145°
Other designations
6 Aquarii, HR 7990, HD 198743, BD-09°5598, FK5 1547, HIP 103045, SAO 144895, GC 29109, CCDM 20527-0859.
Database references
SIMBAD	data

Mu Aquarii (μ Aqr / μ Aquarii) is a binary star in the constellation Aquarius. It is approximately 155 light years from Earth. It shares the traditional name Albulaan with ν Aquarii. The name derives from an Arabic term al-bula^cān meaning "the two swallowers".

Mu Aquarii is a spectroscopic binary which has a stellar classification of A3m. Its two components have an orbital period of 1782 days and a separation of 0.1 arcseconds.