58 Dr. Herschei/s Experiments on the Means 
Mr. Bode’s stars 19, 25 and 27 Ceti are marked 7m, and by 
comparing the asteroid, which I find is to be called Juno, with 
these stars, it lias the appearance of a small one of the 8th 
magnitude. 
With regard to the diameter of Juno, which name it will at 
present be convenient to use, leaving it still to astronomers to 
adopt any other they may fix upon, it is evident that, had it 
been half a second, I must have instantly perceived a visible 
disk. Such a diameter, when I saw it magnified 879,4 times, 
would have appeared to me under an angle of 7' 19", 7, one 
half of which, it will be allowed, from the experiments that 
have been detailed, could not have escaped my notice. 
Oct. 1. Between flying clouds, I saw the asteroid, which in 
its true starry form has left the place where I saw it Sept. 29. 
It has taken the path in which by calculation I expected it 
would move. This ascertains that no mistake in the star was 
made when I observed it last. 
Oct. 2, 7 h . Mr. Harding’s asteroid is again removed, but 
is too low for high powers. 
8 h 30'. I viewed it now with 220,3 288,4 410,5 496,3 and 
879,4. No other disk was visible than that spurious one which 
such small stars have, and which is not proportionally mag- 
nified by power. 
With 288,4, th e asteroid had a larger spurious disk than 
a star which was a little less bright, and a smaller spurious 
disk than another star that was a little more bright. 
Oct. 5, with 410,5. The situation of the asteroid is now as 
in Fig. 4. I compared its disk, which is probably the spurious 
appearance of stars of that magnitude, with a larger, an equal, 
and a smaller star. It is less than the spurious disk of the 
