



THE GREAT COMET OF 1858. 







o: 



Paris M. T. 

 of Observation. 



- ^»_ 



Place of 

 Observation. 



• 



a 



8 ' 



Number of 

 Coini). Star. 



J a 



A 8 



1 859. 









■ 







Feb. 5.55918 



Santiago 



323 49 20.06 



° < 1, 



—58 41 2.20 



350-15 



— 57/.H) 



— 24.75 



7.56461) 



u 



324 50 58.45 





351 



—50.91 



^^» ^ » v ^^» 



8.32536 



Cape 



325 14 25.25 



58 59 18.46 



351 



—48.58 



— 9.06 



21.32089 



M 



332 1 46.90 



60 33 49.94 



352 



—47.86 



— 9.99 



21.32628 



a 



332 1 58.20 



60 33 54.71 



352 



—16.92 



— 12.23 



21.54674 



Santiago 



332 8 57.59 



60 35 35.(>5 



356-3 



—5(».79 



— 9.39 



22..; 2 145 



Cape 



332 33 54.08 



60 41 44.39 



354 



-i-44.30 



—14.10 



22.54558 



Santiago 



332 40 56.92 



60 43 7.19 



356-5 



—53.32 



— 9.18 



23.54858 



« 



333 13 31.86 





353 



— 85.58 





24.54393 



u 



333 45 32.03 



60 59 13.05 



353 



— 1485 



-f 0.K5 



25.31888 



Cape 



334 10 43.88 



61 5 46.15 



357 



—4048 



—15.09 



25.32777 



u 





61 5 50.04 



357 





— 1 L68 



26.30820 



m 



334 42 49.77 



61 13 52.40 



358 



— 45.94 



—15.06 



26.31610 



a 



334 43 6.12 



61 13 56.77 



358 



—45.04 



—15.52 



27.31914 



u 



335 15 56.44 



61 22 17.03 



359 



— 40.83 



—17.15 



28.32881 



a 



335 48 59.67 



61 30 48.03 



360 



—45.06 



—20.45 



Mar. 1.30403 



U 



336 21 4.81 



61 39 5.74 



361 



—47.70 



—22.22 



1.31416 



u 



336 21 25.32 



61 39 5.96 



361 



—47.26 



—17.26 



1.53531 



Santiago 



336 28 34.91 





360 



—54.21 





2.30038 



Cape 



336 54 6.52 



61 47 32.30 



362 



—44.02 



—16.36 



2.30915 



u 



336 54 26.91 



61 47 35.01 



362 



—41.08 



—14.53 



4.3 1 626 



* 



338 1 22.54 1 



—62 5 13.02 



363 



—37.19 



—22.37 



I 



In the next place we proceed to the computation of the perturbations produced by 

 the five large planets, from Venus to Saturn inclusive. The perturbations by Mercury 

 were neglected, as, from the rapid motion of this planet, the intervals of time in the 



the disturbing forces would require much reduction, with consequent 



computation of the 



increase of labor, while a rough estimate of the change produced in the comet's geo- 



centric 



showed it could not at any time much exceed 0".l 



To render the 



gration possible it was necessary to adopt different intervals of time in the calc 

 of the disturbing force in different parts of the orbit ; the near approach of the 

 to Venus, in October, required them to be made as short as one day. The i 

 time for the forces given below is however uniformly the same, being ten days, 

 unit of length is a unit in 



it of 

 The 



is a unit in the seventh decimal place. The forces and perturbations 

 belong to the usual system of rectangular equatorial co-ordinates ; and the constants 

 in the integration have been so taken, that the perturbations are the deviations of the 

 comet from its osculating orbit of Oct. 2. 



