Alpha Aquarii

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**α Aquarii**
Observation data Epoch J2000.0
Constellation	Aquarius
Right ascension	22^h 05^m 47.0^s
Declination	−0° 19' 11"
Apparent magnitude (V)	+2.95
Distance	$759^{+180}_{-120}$ ly ( $233^{+56}_{-38}$ pc)
Spectral type	G2Ib
Other designations
Sadalmelik, El Melik, Rucbah, 34 Aquarii, HR 8414, HD 209750, BD-01°4246, FK5 827, HIP 109074, SAO 145862, GC 30896, CCDM 22058-0019

Alpha Aquarii (α Aqr / α Aquarii) is a star in the constellation Aquarius. It also has the traditional names Sadalmelik, which derives from an Arabic expression سعد الملك sa^cd al-malik/mulk meaning "Luck of the king/kinghood", as well as Rucbah, which it shares with Delta Cassiopeiae. It is only one of two stars with ancient proper names to lie within a degree of the celestial equator. The origin of the Arabic name is quite lost to history.

Sadalmelik has a stellar magnitude of +2.95 m. It has a diameter 80 times that of the Sun, and its luminosity is 6000 times greater, giving it the spectral class G2Ib. It is a member of a rare class of stars known as yellow supergiants.

Sadalmelik is about 760 light-years from Earth.