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> I note that the GCVS v4.1 shows photo-blue maximum of 8.8, and given > that the star has B-V ~1.5, and thus maximum of V ~7.3, it seems as though > it would have to be above V=7.0 (at least) to be considered out of range. > Also, the TASS MkIII photometry shows mean V=8.23 with rms scatter of 0.26, > so it's not even 1-sigma above the mean of the MkIII data. > This looks something like an RV Tauri star to me. > > \Brian It's bluer at maximum and fainter at minimum. The "p" range on the GCVS is 8.8 - 10.6 B-V at maximum is ~1.4 and at minimu ~1.7. This would translate to V= 7.4-8.9 However, the star has usually been as faint as 9.5. These "p" values generally don't agree with B-V transformations. It happens a lot with miras and SR stars in the South that when observed visually look totally different to what one might expect... For instance, V798 Cen is catalogued as varying in p from 8.7 to 9.3. With a B-V of 1.5 or redder, the star should vary between 7.2 and 7.7 or 7.8. But it is generally at V= 8.0, changing from 7.5 to 8.5. In the AI CMi's case, deep minima last less than the relatively bright state and the Mark III data consist in too few observations to establish a mean magnitude. In any case, I can not find any record that show this star brighter than now in V. And this is fun! ;-) Sebastian.
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