The Sun

Date & Time:	May 1 1999, 12:45 JST(+0900), 1/500sec exp.
Optical:	TAKAHASHI 12.5cm(4.9") fluorite refractor with conversion lens (f=2000mm, F40.0)
	Apertured to D=50mm, with ND400 + ND8 filter
	Auto-guided with GOTO MX-II Equatorial
Camera:	VIXEN VX-1
Film:	Fujichrome VELVIA
Location:	Ooizumi vil., Yamanashi pref.

This image shows you the most familiar star, the sun. The hot glaring surface of the sun is called "photosphere", and several sunspots are scattered. It's estimated that the absolute temperature of the photosphere is about 6000K, and that of sunspots would be 4000K or so.

Warning: When using a telescope for observing or photographing the sun, lacking knowledge of proper solar filtering methods can pose risks of visual impairment or blindness.
I do not assume any responsibility for any accidents that may occur as a result of observing or photographing the sun through this site.

Naked eye sunspot 2001

The sunspot group

		Copyright(c) 1999 by Naoyuki Kurita, All rights reserved.
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