|<
<
> > > > >
>|
Some interesting numbers
Betelgeuse, alpha Orionis, HD39801, HIP27989
M2 Iab Red Supergiant
Star with largest apparent diameter
Hipparcos-distance =131 ± 30 pc
R=22.1 mas, R = 620 R
Sun
M=5 ... 20 M
Sun
T
eff
=3500 ... 3600 K, logg=-0.5 ... 0.5