The spectral type of Pollux is K0IIIvar. (The “var” indicates that this is a variable star of known type. The “III” indi

[answerhappygod]

The spectral type of Pollux is K0IIIvar. (The “var” indicates
that this is a variable star of known type. The “III” indicates
that the star is a giant star.) The spectral types of other stars
you’ve viewed are as follows:
HIP 87937: M4
HIP 108870: K5
Tau Cet: G8
Regulus: B7
Each spectral type is divided into 10 subclasses. The subclass
is indicated by the numeral following the type. Therefore, a
sequence of types and subclasses would be B0, B1, B3, . . . B9, A0,
A1, . . . etc.
Which star observed so far has a spectral type closest to
Pollux?