Delta Apodis

Delta Apodis is a double star in the southern constellation of Apus. Its identifier is a Bayer designation that is Latinized from δ Apodis, and abbreviated Del Aps or δ Aps, respectively. Based on parallax measurements, the distance to δ¹ Apodis is approximately 620 light years,^[2] while δ² Apodis is found to be around 563 light years from Earth.^[4] They may form a common proper motion pair.^{[citation needed]}

The brighter star, δ¹ Apodis, has an apparent magnitude that varies from +4.66 to +4.87.^[12] It is a red giant with a stellar classification of M5 IIIb,^[6] and is classified as a semiregular variable with pulsations of multiple periods of 68.0, 94.9 and 101.7 days.^[13] δ² Apodis has an apparent magnitude of +5.27 and is an orange K-type giant with a class of K3 III.^[6] Both stars are bright enough to be seen with the naked eye under good observing conditions. The pair have an angular separation of 103.4 arcseconds (as of 2016),^[14] which is wide enough to allow them to be seen individually by a person with good eyesight.

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, English: the Sixth Star of Exotic Bird.)^[15]

• Image δ Apodis