A blue giant SX Phoenicis variable star. They have spectral classifications in the range A2-F5 and vary in magnitude by up to 0.7. Compared to the Sun, these stars have a lower metallicity, which means they have a reduced abundance of elements other than hydrogen and helium. They also have relatively high space velocity and low luminosities for stars of their stellar classification.
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In Space Opera
Planet Gummidgy in Known Space short story Grendel is in the system. As the real world location of CY Aquarii is estimated at about 1300 light-years from Sol, far outside the "bubble" of Known Space it is suggested that the planet probably is in the Beta Lyrae system and not in the CY Aquarii system. The other solution is to move the CY Aquarii system.