220 
Dr. Herschei/s Observations on 
n h 20 ; . Ceres has advanced in its orbit; but has left the 
supposed satellite behind. 
March 30. 9 h 35'. A supposed 1st satellite is directly fol- 
lowing Ceres : it is extremely faint. A 2d supposed satellite is 
north-following. See Fig. 4. The supposed satellites are so 
small, that, with a 20-feet telescope, they require a power of 
300 to be seen ; and the planet should be hidden behind a thick 
wire, placed a little out of the middle of the field of view, which 
must be left open to look for the supposed satellites. 
i2 h 17'. Ceres has changed its place, and left both the sup- 
posed satellites behind. 
March 31. cf 20'. There is a very small star, on the north- 
preceding side of Ceres, which may be a satellite. 
1 i h 50'. Ceres has moved forwards in its path ; but the sup- 
posed satellite remains in its former situation. The nearest star 
is 2 o" of time from Ceres ; so that, within a circle of 40" of 
time, there certainly is no satellite that can be seen with the 
space-penetrating power of this instrument. 
It is evident, that when the motion of a celestial body is so 
considerable, we need never be long in doubt whether a small 
star be a satellite belonging to it, since a few hours must 
decide it. 
May 1. i2 h 31'. I viewed Pallas with the 20-feet reflector, 
power 300 ; there was no star within 3', that could be taken for 
a satellite. 
Of the Colour of the new Stars. 
Feb. 13. The colour of Ceres is ruddy, but not very deep. 
April 21. Ceres is much more ruddy than Pallas. 
April 22. Pallas is of a dusky whitish colour. 
