From: utzoo!decvax!cca!Lynn.ES@PARC-MAXC@sri-unix
Newsgroups: net.space
Title: Re: Sunspots (#243)
Article-I.D.: sri-unix.2160
Posted: Tue Jul 20 10:55:46 1982
Received: Sun Jul 25 02:01:09 1982

A co-worker of mine enquired about a similar naked eye sunspot sighting June
15.  I verified that there were TWO sunspot groups (each group appears as a
single spot to the naked eye) visible to the naked eye on the next clear day
here, June 19, though one group was just barely visible.  The rotation period of
the sun is about 27 days at the place where the largest spot group was.  It
appears that the same group has come around again.  I checked it out yesterday
with solar filter, both naked eye and with binoculars.  The spot group is right
where you described it, but was just too faint for me to see it without
binoculars.  It has dissipated considerably since June.
  
Caution: If you try viewing the sun, even at sunset/sunrise when it is
considerably dimmed by our atmosphere, get a filter made for solar viewing;
otherwise you are risking eye damage.

/Don Lynn