Spectral class of stars

PTS

Hi,
Here are spectra (around hydrogen alpha region) of several stars taken last night.

1. Theta 1C Orionis (class O6, with emission lines from M42)
2. Merope in M45 (class B6)
3. Rigel (class B8)
4. Sirius (class A0)
5. Epsilon Aurigae (F0)
6. Capella (G1+G8+K0)
7. Aldebaran (K5)
8. Betelgeuse (M2)

PTS