Object/type:	Sun / sun spots & surface features
mag/dia/dist:
constellation:
date/time/place:	Mar 25, 2001 / 10:10 / kanjanaburi
trans'y/seeing/l-poll:
telescope:	4" refractor with H-alpha filter
eyepieces/power:	32 mm / 16X
sky atlas page:

By using hydrogen alpha filter, it can see hydrogen activity on the surface ,as sketch, short dark lines appeared in the line of sun spots. But the spots umbra/penumbra were quite unclear when compare to normal solar filter.
The kirdkoa observatory also showed sun surface granular and solar prominent by using 16" LX-200 + Hydrogen alpha + CCD. it's very impressive. Home

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