ON FLAMSTEED'S STARS "OBSERVED, BUT NOT EXISTING." 75 



Already Bail.y leinaiki'd that tlieiv- is a ilitterenco of 131' Ix'twecn the. reading 'per linean 

 (liaf)0)i(ihfi kxml thai per .sirias cochlea'. Indeed 1;>()7.42 converted into are. make 57° 41' 2". The 

 corrections proi)osed by Ar.n'elan<ler are very i)lansible, viz: 58° 7' 0" for the liiicw didf/onalct 

 and l,'J17.4li = 58° 7' -1" for the sfrifc cochlav, since from the other stars here observed follows the 

 ditlereuce {lincw (lintionalcs — stria; cochlvw) =—29". The deeliiiation in the BritiKli Cutahxjuc 

 then onjilit to be corrected by — r»', and the star is easily recognized as LL. 11805, which was also 

 twice observe*! by Bessel. 



We have W. (!'' 112, for 1825: (i'' ;3™ 20^73 = 90° 50' 11" ; - (P ;!l' 7"..'5 

 Keduction to 1G90 - 1 38 24 +0.8 



W. 1 1 2 for 1090 890 uTil'-" - 6° 316 



Brit. Cat. 804 (corrected f^ by -5') 89 — G 30 40 



Dift'erence — 26" 



5) B. FI. 913(6i"')- 



There can be no doubt but that the star, which in the British Catalogue passes under the 

 name of 21 Oeminoriim, is identical with the preceding star or 20 Geminorum. and originated from 

 an error of 1'" iu the time. Historia Gcelestis, II, p. 294, 7'' 26'" 50" ought to be corrected into 

 Th 25™ 50^ 



20 Oeminoriim is a double star, now about 19" asunder, and the sequens is called by Piazzi 



and others 21 Geminorum, which, therefore, is different from what in the British Catalogue was 



called so. The components are, according to Piazzi, respectively 8th and 7th magnitude, but 



together they made to Ileis the impression of a 6.7 magnitude star. Fhun-iteed's telescope hardly 



could separate them, especially if they were at, his time still nearer together, as the proper motions 



in Miidler's Bradley seem to indicate, lieducing Br. 955 and 956 from the last-meutioueil catalogue. 



to 1690, we find 



Br. 955: 93° 33' 15.02"; +17° 56' 59".9l 



Br. 950: 33 16.34 57 19 .03 



or the middle, 93° 33 15.7 + 17° 57 9.5 



The British Catalogue has .... No. 912 : 93 32 30 + 17 57 15 



No. 913 : 93 48 30 17 57 40 



and it is clear that the former right ascension is the correct one, and the latter must be diminished 

 by 15'. 



6) B. Fl. 1007 (7"). 



In the note to this star, which was observed by Flamsteed 1095, March 8, at 7'" 1™ 51", Haily 

 says: "I cannot find any star that will correspond with the position here given. In my list of 

 Flamsteed's inedited stars, I have suggested that it might be Piazzi VI, 346 ; but on reconsidering 

 and re-examining the subject, I am not now of that opinion." The star, however, exists still iu its 

 place, where Flamsteed observed it, and is VVj 7'' 66 = Dm. + 17° 1498 (7'"). We have 



W2 1^ 66, for 1825 : 7'' 1"' 40^01 = 105° 25' 0.2" ; + 17° 15' 31".3 



Reduction to 1690 ■■.- 1 57 13.6 ; + 11 15 .1 



W. 60 for 1690 103 27 47 ; +17 26 46 



British Catalogue 1007 is 103 27 5 ; + 17 26 30 _ 



W. - Fl + 42" + 16"- 



Argelander makes (A. N. No. 226, p. 162) a curious mistake. He says (ad. No. 148) : " Stimmt 

 vollkommen niit Piazzi VI, 346, wenn man die Durchgangszeit liest 7'' I'" 31" statt 7'' 1™ 5P." The 

 position of Piazzi 6"^ 346 is 



for 1800 : 104° 57' 47".2 ; + 15° 38' 57".0 

 Reduction to 16'JO : -1 34 25. 0; +9 0.2 



Piazzi 34t3 reduced to 1690 : 103° 23 22 ; + 15° 47 57 



