The constellation Phoenix, a southern constellation named after the mythical bird.
Phoenix is a constellation visible in the southern hemisphere.
Mixed kana-kanji spelling; common in astronomy contexts when the kanji 鳳凰 is considered difficult.
From 鳳凰 (ほうおう, 'phoenix') + 座 (ざ, 'constellation'). The constellation was named by European astronomers and later adopted into Japanese astronomy.