Observations of 500 Nebula. 



105 



1869 Febr. 21. Slcy not v clear, bright moonlight, and images v unsteady ; 

 magn p 210 and 320. Neb annular with partial r, much more conspicuous than in 

 the annular neb of Lyra. 



Diam in decl-circle measured = 25 ',9. 

 1869 Aug. 3. Atmospheric state v favourable, but images unsteady; magn p 

 320 and 480. Neb annular with *... twinkling in the neby. Deviation of the ring 

 from the circular form hardly perceptible. 



Diam in decl-circle measured = 20", 4 (4) 

 Diam in the par (pass) =21", 7 (7). 

 Rem. The S obs by Vogel in the nearest vicinity I designate with a, b, c. 

 *a — Neb. C = + 2 S ,5 ; + 13"(13 m ) 

 *b — Neb. C = + 4*,0; + 24"(12 m 13) 

 *c — Neb. C= + 8*,0; - 135"(12 m 13). 

 Of these I never succeeded in seeing *a! I certainly never saw the neb in 

 v favourable circumstances, but it is yet v astonishing, that I never should have per- 

 ceived a trace of the said *. Is there an error in the position, or is the * var? 

 1867 Aug. 25 for instance I sought v assiduously but in vain for this * ; I then 

 saw an eF *, which really forms d* (not v close) with the *b : this * ab a diam 

 of the neb n from *b. The *a sought for also in vain 1869 Febr. 21 and Aug. 

 3 — magn p ab 500. 



h2242: * 11°5002 (9 ,n ,5) sp; sev «... glimmering around the C. 

 GC. 4967 much Fr but Gr than J/2242; *a ll'"12 nf. 



U2257: *a 12' n sp ; * 16 Pise. sf. 

 GC.4994 not with certainty seen. 



1>2264 looks like @ with momentary C r ; *a ll m sf. 



1/2265 has a half resolved N of variable appearance; *a 10 ,n sp, *b ll m 12 sf. 



h2290; Nova XII; 1,2300. 



It 2290: *a 10 m ll sp. 



Nova XII in the same decl-circle with * 19°.5197 (7 m ,5), 1%' n. Sev fine «... seen 



in the neby? The object in the autumn 1866 quite distinctly seen as a neb with 



stell C; in the autumn 1869 hardly visible! 

 h 2300 contains sev fine •*..., but does not look r; v indistinct C condens, once a 



stell C obs ; E sp to nf. Two dull «... 12 ,n 13 f the s end of the neby; d* or S 



neb immediately s from neb? 



Nova Acta Reg. Soc. Sc. Ups. Ser. III. 



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