348 







Mean Hamb. 













Observa- 



1847. 





Time. 



Apt. 



A. R 



.of^ 



Apt. 



Dec. of ^ 



tions. 



March 22, 



h. 

 15 



■m. s. 

 1 10.5 







241 



52 



52.7 







—13 



41 39.4 



17 



April 



11, 



15 



13 20.0 



241 



28 



43.3 



12 



41 5.6 



19 





13, 



13 



15 45 



241 



17 



8.8 



12 



34 15.8 



30 





20, 



13 



14 49 



240 



22 



6.3 



12 



7 54.6 



10 





21, 



13 



9 23 



240 



12 



41.8 



12 



4 11.0 



19 





23, 



14 



33 43 



239 



52 



13.2 



11 



56 12.2 



14 



May 



7, 



12 



10 46 



237 



3 



23.0 



11 



3 46.3 



10 





9, 



11 



55 58.1 



236 



36 



14.8 



10 



56 59.6 



10 





10, 



12 



9 44.1 



236 



22 



15.2 



10 



53 24.0 



18 





11, \ 



12 



3 23.0 



236 



8 



18.0 



10 



50 25.8 



5 





12 



28 0.4 



236 



8 



6.2 



10 



50 ll.S 



Mer. Cir. 





13, 



11 



11 53.1 



235 



40 



47.8 



10 



43 51.0 



15 





15, 



11 



7 3.1 



235 



12 



35.5 



10 



37 40.1 



9 





16, j 



12 



3 40.7 



234 



57 



52.2 







Mer. Cir. 





13 



11 13.6 



234 



57 



14.8 



10 



34 30.1 



8 





21, 



11 



39 23.4 



233 



48 



15.1 



—10 



21 11.0 



Mer. Cir. 





24, 1 



11 



24 53.1 



233 



7 



28.9 



10 



14 31.4 



Mer. Cir. 





12 



12 9.9 



233 



7 



12.0 



10 



14 12.0 



7 



I join here my observations of the Comet lately seen. 



1847. 



Mean Time, 

 Hamburg. 



May 18 

 19 

 21 

 22 



11/t. 4m. 46.9s. 



11 6 44.0 



12 50 2.0 

 12 41 40 



Apt. A. R. of # 



150° 31' 0.8' 



150 29 27.4 



150 27 24.4 



150 25 16.6 



Apt. Dec. of # 



-f39° 20' 47.1' 



39 35 32.3 



40 5 50.8 

 40 20 30.0 



Longitude of 



Apt. eq. March 19. 



Mr. Niebour, assistant at the Hamburg Observatory, has thence 

 computed : 



Perihelion passage, June 18'^. 08925 mean Greenwich time. 

 Perih. 135° 2' 29" 

 ^ 173 27 53 

 Inclination, 80 36 22 



Log. Perih. Dist. 0.3209050 



Motion retrograde. 



Believe me, dear Sir, 



Yours, very faithfully, 



C. RUMKER. 



To Prof. A. D. Bache, 



Sec. of the American Phil. Society. 



