Mira and its neighbors
As Mira (OMI CET) rises in the east and places herself in the evening sky, you may wish to observe two lesser observered variables. In the parallelogram-shaped asterism 2.5 degrees north of Mira, lie R and RS CET. R CET is a Mira which varies from 7.2 to 14 V in 166.24 days and is now fading at 9.1 Vis. RS CET is a questionable SR which varies from 7.9 to 8.6 V with an undetermined period.
In looking at the ASAS data for RS CET however, this SR classification seems doubtful, with most of the observations clustering around 8.4 V. Check out: http://www.astrouw.edu.pl/cgi-asas/asas_variable/022800+0013.3,asas3,0,0,500,0,0). Is RS CET constant? It seems so, but their are some outlier observations. RS CET is also listed a G star, not M, C or S which are common for other pulsators. Any comments or ideas? RS CET is problematic at best.
If you observe Mira, give a R CET a look. It is easy to find and this under-observed Mira is worthy of your attention.
Kevin Paxson - PKV