Christian Froeschlin <chr### [at] chrfrde> wrote:
> > On the cooler side, a B-V of 5.575, well within the range of the
> > measured stars
>
> That sounds fishy to me. The coolest stars should have B-V
> of about 2.0 or so. Note that not all catalogs have all colors
> and V = 30 seems to indicate there is no V data available.

I limited the search to stars with V <= 15, and double-checked that no stars of
V = 30 were returned.  If the B value was 30, then I skipped the color
calculation and used plain white.  Even so, the highest B-V was 10.450.

The coolest star in the BSC4 has a B-V of 5.74, and is type C6IIe.  (A carbon
star would screw up the black body correlation, wouldn't it?)  I don't know if
all the high B-V stars are carbon stars.  Also, I don't know what a carbon star
looks like.

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