Roger Hamlett wrote

"DT" wrote in message
...
Richard Tobin wrote
The earth is sufficiently large compared with the distance to the moon
that the apparent size of the moon from different locations on the
earth's surface must vary by a couple of percent. So in theory there
could be an eclipse that was total viewed from one place and
simultaneously annular somewhere else.

Has this ever been observed? Obviously it would be very rare, and
more likely at high latitudes.

-- Richard

Without leaping to the bookcase, I think it is more common than you
suggest, it is inevitable that the situation will become more common as
the moon slowly recedes from the earth, until at some point, all
eclipses will be annular. Jean Meeus has covered this in depth in his
wonderful books.
I don't think the eclipse will ever be 'simultaneously annular' though.
The area covered by totality is small. However the same eclipse, observed
at one point on the path followed by the totality, and then a little
earlier/latter at a different point, can well display this. The 'path
charts', for the last Solar eclipse, that I saw, showed exactly this.

Best Wishes

I take your point, I mis-interpreted the OP regarding the word
'simultaneously'. This situation would certainly seem to be extremely
unlikely. I might have a crack at the calculation.

Denis
--
DT
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