and positions of^fSS double and triple stars, ^c, 79 



No. CCCCLXXXV. continued. 



Mean Result. 

 Position 81° 52' np ; Distance 15".446 ; Epoch 1825.17. 



A measure of the position of this star in 1783 gave 

 74° 54' np, which differs 6° 58' from the present angle, being 

 a change of + o°.i7o per annum, a very considerable quantity 

 for so distant a star. However, the great difficulty of the 

 measures must make us cautious in ascribing this to a real 

 motion. The distance presents no sensible alteration. (H.) 



No. CCCCLXXXVI. R. A. 5^ 26" ; Decl. 5° 32' S. 



6 Orionis ; Struve, 194 ; HI. 1, 



Quintuple ; A of the 6th, B the 7th, C 75:, D of the 8th, and 

 E of the 12th magnitudes. The four first stars form the 

 Trapezium, in the nebula of Orion. 



Measures of A B. 

 Blackman-street ; December 27, 1823 ; Five-feet Equatorial. 



Position = 40* 16' » j9 j 8 Obs. DifF. = 4° 39' ) „ 

 Distance = 13".293 | 8 Obs. [ Diff. = ©".979 j ^^"^V- 



Blackman-street ; December 29, 1823 : Seven-feet Equatorial. 



, , , lih and 8th magnitudes. 



Position = 40° c' np I 8 Obs. Diff. = 2° 2c' ) tt • r 

 Distance = iVisi | 3 Obs. Diff. = o''.i92 J Unsatisfactory. 



No more observations of distance can be obtained : the night is become cloudy; 

 indeed whilst those here given were procured, the stars were only visible by glimpses, 

 and then were very indistinct. 



Blackman-street ; December 30, 1823 ; Seven-feet Equatorial. 



6th and Jth magnitudes. 



Position = 41" 3' np 6 Obs. J Diff. = 2° 2' ) ^ , , , 

 Distance = i3".85i 6 Obs. | Diff. = i".0345 ^^^^^^^^^ steady. ^ 



