212 Clusters and Nebulce — Double Stars. 



orange 4-mag. star, we shall find, something less than 2° p, a 

 little s, a number of small stars, forming a very fine gronp in 

 a large field; just /this, we catch a faint cloud, which readily 

 yields up its stellar components to increasing power. It is 

 4520 of Gen. Cat., 2056 H. (1833), who says it fills his field 

 (15'), but occupies 3' with its most condensed part, which is 

 of an acute triangular form ; the stars ranging from 11 to 16 

 mags. 



DOUBLE STAES. 



The little map which has served as a guide to the two pre- 

 ceding objects will also aid us materially in discovering a 

 number of pairs, which would otherwise, from their minuteness 

 or their position, have been omitted from our list. In order 

 to keep the diagram more clear, no numbers are affixed, ex- 

 cepting to the stars which we are about to examine, and those 

 referring to Piazzi's catalogue are abbreviated by the omission 

 of his initial and hour. Beginning from the N., where Albireo 

 (/3 Cycpii) is conspicuous, we come first to — 



135. 6 and 8 Anseris, a noble wide 4 and 5 mag. pair, not in 

 Sm.j both orange; the larger a very fine colour. There are 

 three other little pairs, and many small stars, included in a very 

 beautiful low- power field. Next we take — 



136. 6 Sagittce, a triple group. ll"-4 and 70"'l. 327°-l and 

 226 0, 6. 7,8, and 9. Pale topaz, grey, and pearly yellow. This 

 very pretty combination, which lies in a fine field, is readily 

 found by carrying a line from 8 through *y as far again. Nearly 

 1° np 6, but much more p than n, being the first star in that 

 direction in the finder, where it is just visible, we come 

 upon — 



137. 415P.;XIX. Vulpecutce. 4"-5. 340°-5. 8 and 10. Pale 

 white and sky blue (1838" 7). This pretty pair is in "a fine 

 galaxy splash of stars." The larger star, or in observatory 

 language A, appeared reddish to me, 1864*8. Both compo- 

 nents are visible with 65, but it is very minute and delicate. 

 Sm. considers it stationary, but Secchi thinks it may be in 

 motion. 



Reverting to 7 Sagittce, we shall perceive in the finder about 

 2° np, a little triangle of 7-mag. stars, of which the two lying 

 p, 299 and 301 P. XIX, are comparatively near together; the 

 hindmost is double, being — 



138. 320 P. XIX. Vulpeculce. 42""7. 147°-6. Both 7. 

 White. This is a peculiarly beautiful open pair, probably sta- 

 tionary. In the same field, p a little s, I noticed a pretty group, 

 consisting of a smaller, closer, and more unequal pair, followed 

 by a very minute star nearly in the same line. 



8 Sagittw, 4 mag., is worth looking at for its fine orange- 



