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Schreiben Des Herrn Dr. Wichmann an Den Herausgeber 5 Nr. 623. 6 Schreiben des Herru J. R. Hind an den Herausgeler. Mr. Dirhop'r Observatory, Regent's-Park, London 1848. Ad Janr. 4 -6"3 following ubsrrvations , nwiiig to an unueually cloudy prriud. -4u4 5 -5,5 -1,0 Flnra. lria. 1848 G. M. T. AR. Decl. AR. d. --Jam. 4 6h54"33s 4h10m15'29- +16'- 4' 19"O Jaw. 5 5h54" 15' 22h-18"26'78 -5'53'9'5- 5 11 38 36 4 9 59,62 +16 10 30,8 The errors of Mr. d'rlrrest'a kecond elements are -23'8 in The errors of my eplienirris (allowing for parallax and aber- I AR. and +1'37" in Decl. The planet was equal in bright- ration) are, j iiess to ii star of 9. 10 iriagnitutlc. J. R. Hind. Sckreilen des Herr11 Dr. Wichhmann nu den IlerausgeLer. KBnigrberg 1848. JaiiuRr 11. Ich erlaube mir lhnen die folgenden Beobachtungen zuzusenden, mit der Bitto dieselhen in die Astr. Nachr. aufzunehrneu. B eob a ch t 11 n gen mit d e in K ii n i gs b e r g e r He1 i o nr e ter. Koniet entdeckt voir Hind (1847 Febr. 6). Naclrtrag zu Nr. 600 der A. R'. pag. 401. babe die Differenzen cler Sterrie Argel. Zone 39 lSr. 133, 134, 135 niit deni Heliometer gerneescn und gefunden AR. Nr. 134 = AR. R'r. 133 + 8'57"l Decl. Nr. 134 = Decl. 133 -7'33"5 - 135 = - 134 + 14 50,9 - 135 = - 134 -3 14,9 Hieraus ergiebt sich, dafa die AR. yon Nr. 134 bei Argelandvr urn cine Zeiteecunclc zii kleirr ist. Aus allen drei Sterwo fulgt niit Benutzung der von niir gefundeiren Unterschiede der niittlere Ort von Nr. 133 fur 1847 AH. = 353'20' 33"l Decl. = +51'42' 48"7 20 32,8 42 45,4 20 31,6 42 46,4 Mit Anwenduog des Mittels 353 20 32,6 +51 42 46,8 erhalt man nun den Ort des Vergleichsteros n 352 54 48,4 3-51 24 57,9 Den Ort des Vergleichsterns b habe ich durch drgel. Zoo. 56 Nr. 6 bestinimt. (Rlittl. Ort 1847,O) 354 36 7,3 +49 18 47,7 Deiiinach erhllt niaii die beidcn Beobacbtungen des Konreteii 1847 Miirz 3 ah16' 49'' 111. Ii. Zt. AR. & = 352'50' 35"7 Decl. & = +51'24' 32'2 5 9 58 46 354 38 42,4 49 11 52,4 Opposition der Astraea. 1847. 1847 M. H. Zt. AR. /F. ayy. Decl. '6 ayy. AR. = Decl. = Mitt!. Ort 1847,O w '- April 24 1- 239'43'---- 13"9 -11'52' 56"6 a +lo' 29"2 a -23' 36"6 a = 239'32' 6"5 - 11'29' 18"l (1) Mai 10 13 45 44 236 21 37,6 -10 53 25,9 b - 6 35,l 1) -15 25,2 b = 236 27 30,7 - I0 37 58,3 (2) it ti 28 22 236 9 2,s -10 so 24,4 b -19 10,2 1) -12 23,7} 12 11 33 14 235 54 57,8 -10 47 7,6 c + 4 7,l c - 6 18,3 c = 235 50 8,3 - 10 40 46,7 (3) 18 I1 57 18 234 30 10,6 -10 28 50,3 (I + 8 15,6 d + 0 14,7 (I = 234 21 11,7 - 10 29 2,3 (4) Juni 2 11 11 37 231 14 59,9 - 9 59 47,7 e +I4 34,6 e - 4 59,7 3 12 2 26 231 3 10,4 - 9 58 47,3 e + 2 45,i e - 3 59,3 e = 230 59 41,O - 9 54 45,O (5) 4 11 26 16 230 52 20,s - 9 37 55,2 c - 8 5,O e - 3 7,3 Quellen: (I) H.C. p. 346 11. 468. (2) Runik. A. N. 601. (3) Weike's C. Nr. 843. (Ij Helionieter. (5) H.C. p.467 11. 468. Wcifse 441. Runrk. A. S. 604. Den Ort von d hahe icli durch eiricii Strrrr 9" (ails Hist. Cil. p. 468) bestimint, t1esse:r mittl. Ort fiir 1847,O f = 233'54' 3sUl -10'2 I' 1 Ill6 1* Nr. 625. Der nahe daliei stehende Stern 7' g = 233'44'12'5 --10°25'25"7 (far 1847,O aach Lalande) echeint eiae merklicbe dgne Bewegung zu Labrn. Ich beobachtete namlicb : AR. d = g +38' 1% Decl. d = g -3'26"3 cl = f +26 36,6 d = f -7 60,7 f = 6 +I1 24,9 f = g 4-4 24,7 Nach Lalunde ist aber f = g +I0 22,6 f = g 4-4 14,l Der aus g abgrleitete Ort von d wiirde einen zu stark von der Ephenieride abweichenden Ort des Planeten geben. Komet rntdeckt von Brorben. 1847. 1847 M. K. Zt. AH. nyp. & D. app.& AR. = D. = Mittl. Ort 1847,O Qiielle. 54'17' 34"2 +37'27'24"0-- a -12'51"O -24' 13'4 54O29'48'6 +37'5l'4ahl B.Z.448. 13h12' 29" --- -1 - D- dug, - - - 2 12 I8 6 57 2 20,6 38 10 30,4 b - 0 37,l b -13 4,9 57 2 21,4 38 23 42,8 H.C.p.123. 7 12 11 8 72 38 54,l 40 47 5,O C -18 30,7 C - 3 29,7 72 56 51,8 40 50 45,9 Piazzi IV, 262. il it 51 10 85 34 11,9 41 15 31,2 d -43 4,O d - I 38,3 86 16 46,8 41 17 22,6 Grombr.1037. 13 ii 14 17 91 47 13,2 40 57 4,4 e + 8 56,5 e + i 23,l 91 37 49,l 40 55 54,9B.Z,509,5i6,522 18 I4 15 40 f -14 50,O f -22 t3,3 106 49 - 39 8 - 19 11 40 38 I08 53 44,8 38 13 35,7 g - 3 53,O g + 6 34,4 108 57 15,5 38 7 l5,7 H.C.p.209. 22 14 2 20 116 22 34,O 36 4 13,O h - 3 11,5 h +I5 49,3 116 25 25,O 35 48 38,l B.Z. 451. Die vier ersten dieser Bcobachtu~~geoShd schon in fir. 610 der A. N. enthalten, woselbst die Beobachtuog von -4ug.7 durch ein Versehen bei der Ablesung der Heliometerschraube eotstellt war. Die andereri kleioen Aeoderungen I iihren voii einer scharferen Reduction her. Die Beobachtungen des von Mauunis entdeckten Kometen werde ich aplter liefern, da zu der Mehrzahl derselben die Oerter der Vergleichsterne noch nicht sicher bestimmt sind. Hebc. 1847 1. K. Zt. AR. nyp. D. ayp. AR. = D. = Mitt]. Ort 1841,O. ------Juli 31 10h52' 5314 253'44'3Id15 -7'27' 7"2 a -19'47"7 a + 1'47'6 - Wrifd.1067 Aug. I I0 24 24 253 43 1,0 -7 35 45,3 a -21 18,O a - 6 50,5 a=254' 3'33"2 7'29' 2"6 - H. C. p. 288. 2 10 30 5 253 41 52,5 -7 14 40,O a -22 26,3 a -15 45,2 I n 10 46 21 253 44 27.3 -8 38 48.9 b - 0 0.2 b +23 52.01 18 9 19 0 c -11 2010 c +I1 3438 c,254 35 21 19 9 38 4 c - 5 2,8 C + 2 17,7 - 22 9 33 12 254 50 29,9 -10 46 26,l d + 3 23,7 d - 8 19,5 1 tl=254 46 23,3 -10 38 14,5 Weifse1127. Alle vier Yterne bediirfen einer genaoeren Restinimung. Nepturi. 1847 M. K. Zt. AR. ayp. Decl. ~pp. AR. = Decl. = Mittl. Oerter 1847. \hh/ 12h23' 0" 331'25' 38"9 -1202 I' 3 5147 5' 68N3 -+IS' 45"s 33-40' 48"9 a-- a a Bradley 18 - - Aug. - + 19 I0 42 52 24 11,5 22 8,2 a + 4 30,8 a +I8 13,O 18 48,9 40 41,8 Lalande 22 11 41 41 19 24,5 23 55,4 a - 0 16,4 a 4-16 25,7 18 47,4 40 41,7 Piazzi 28 11 31 34 10 0,4 27 21,4 a - 9 41,O a 4-12 56,6 18 48,3 48 48,6 Beesel Oct. 27 7 45 14 330 2 26,3 5t 42,4 h-3 59,9 -30 35,7 hlitt. 331 18 47,s --12 40 45,3 Nov. 3 7 38 43 0 18,l 52 23,9 h-6 6,6 -31 16,4 b = 330 5 36,5 -12 21 25,9 Lalande.2 3 7 39 34 0 22,o 52 26,5 c -31 26,3 +I2 20, I 5 41,7 21 31,s Bevsel 6 8 17 2 329 59 55,2 52 34,7 c -31 5'2.4 12,l +I2 Mitt. 330 5 39.1 -12 '21 28.7 6 8 17 14 59 52,7 52 30,8 b- 6 31,3 -31 23,5 c 330 31 -13 8 4:5 Bessel 27 6 56 50 330 5 13,2 50 25,s C -26 30,3 22,4 = 6:O +I4 30 5911 5 l1:5 Lalande 27 6 57 59 5 13,6 50 23,s d -25 17,6 +la 45,7 Dec. 9 7 4 42 14 42,l 46 54,l d -15 46.6 4-22 17.0 Mittel 330 30 2,6 -13 5 8,O 9 761 14 42,2 46 54,7 c -16 58;8 c /17 5414 d = AR.c ---1'12"3 Dec1.c -4'21"9 25 6 3 53 33 53,8 39 49,6 e - 3 16,O e -21 15,2 9 Nr.
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