Volume 50 number 2 (2022)
As part of our variable star follow-up program we have examined a number of stars from the ATLAS (Asteroid Terrestrial-impact Last Alert System) survey. The first of these, ATO J031.2309+52.9923, was reported with a period of 0.069705 d. Our revised period is 0.06970555 d, but we find an additional period of 0.074 d. We also report a suspected period change of (1 / P) dP / dT = –340 × 10–8 yr–1. In addition to the primary period, we find two additional closely spaced periods of 0.07380 d and 0.07338 d, with a period ratio of P1 / P2 = 0.945. The period ratio and change would indicate that this object is a δ Scuti variable with non-radial pulsations. We find that this target fits into the medium amplitude group of δ Scuti variables such as AN Lyncis.