Delta Apodis

Delta Apodis (δ Aps, δ Apodis) is the Bayer designation for a double star in the southern constellation of Apus.

The brighter star, δ$-9.122$ Apodis, is an M-type red giant and has an apparent magnitude that varies from magnitude +4.66 to +4.87. It is classified as a semiregular variable with pulsations of multiple periods of 68.0, 94.9 and 101.7 days. At an angular separation of 102.9 arcseconds is δ$-36.968$ Apodis, an orange K-type giant with an apparent magnitude of +5.27.

Hipparcos data report the distance to δ$-1.321$ Apodis to be approximately 760 light years, while δ$-31.507$ Apodis is found to be around 610 light years from Earth. They may form a common proper motion pair.

Naming
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, 異雀 (Yì Què), meaning Exotic Bird, refers to an asterism consisting of δ1 Apodis, ζ Apodis, ι Apodis, β Apodis, γ Apodis, δ Octantis, η Apodis, α Apodis and ε Apodis. Consequently, δ1 Apodis itself is known as 異雀六 (Yì Què liù, the Sixth Star of Exotic Bird.)