Three of the Mira stars on the SPA program are will be visible in binoculars during May. T Cephei, a popular circumpolar star with a typical range of 6.0 – 10.5 was recently observed at about the seventh magnitude. It is currently on the rise and is predicted to reach maximum brightness in May.
Two more easy to find Mira stars on the SPA program are R Serpentis and R Bootis. R Serpentis variability was first observed by the German astronomer K.L.Harding in 1826. Harding is now best remembered as the discoverer of Juno; the third asteroid to be discovered. R Serpentis has a typical range of 6.9 – 13.4 and is predicted to reach maximum brightness in May. At the end of April, it was observed to be around the eighth magnitude.
R Bootis variability was first observed by the two German astronomers, E.Schonfeld and F.W.Argelander of Bonn Observatory while they complied their star atlas; Bonner Durchmusterung. R Bootis has a typical range of 7.2 – 12.3 and when it was last observed in April, it had a magnitude of 9.5. As it is also predicted to reach maximum this month, it should become visible in
binoculars over the course of May.