WX Del is one of the SAAF's 50 Forgotten Miras. It was discovered by Cuno Hoffmeister in 1930. WX Del is the longest-period mira of the 50 on the SAAF's list. The current period is 528.8 days, close to the average period since 1897 of 528.3 days. The diagram shows SAAF observations 2012-2026.