Ols^rvntiotis of the Appearance of the Comet. 227 



globe, can only be regarded as an approximation ; but as 

 these have been done with great care, they will, it is hoped, 

 be foimd sufficiently correct to delineate its apparent path 

 m the heavens. 



Sept. 7, 1811, eight o'clock in the evening, Boston, Lin- 

 colnshire, lat. 53'' V N. long. 0° 5' E. 



From the star jS in Ursa Major 14° O'. Ditto star y 

 15° 15'. Rijrht ascension ! 60° eV. Declination 42° 30'. 



Sept. 8.— From the slar /3 13^ 30'. Ditto star 7 15° O'. 

 Right ascension l6l° 30'. Declination 42° 45'. 



Sept. Q.- — From the star /3 13° 15'. Ditto star y 14° 30'. 

 Right ascension 162° o'. Declination 42° 50'. On the 

 Sth and gth the star w was seen through the tail. 



Sept. 10. — From the star /3 13° O'. "Ditto star 7 13° 15'. 

 Right ascension l63° 30'. Declination 43° 15'. 



Sept. 1 1. — Fion) the star 7 12° 45'. Ditto star % in the 

 same constellation 8° O'. Right ascension l64° 5o'. De- 

 clination 43° 40'. 



A line drawn from Cor Caroli to the star A in the foot of 

 Ursa Major passed through the coniet; also one drawn 

 from the star y^y in the same constellation, to the star 9 in 

 Draco, very f.early. 



Sept. 12. — A cloudy night. 



Sept. 13. — From the star 7 12° o'. Ditto star ;/ 6° o'. 

 Right ascension 166° 40'. Declination 43° 60'. 



A line drawn from Cor Caroli to w in Ursa Major, and 

 one drawn from ^ through t|/, in the same constellation, 

 passed through the comet. 



From the above it appears that the comet will pass through 

 the neck of Asterion, about 5° below the star r, in Ursa 

 Major, which I have endeavoured to show in the diagram : 

 that it also passed the ecliptic about £5° of Cancer. In 

 a small table of comets which have been observed, I find 

 this account of those which passed through Cancer in their 

 perihelion. 



Cancer. 



1532 21° 7' 0" 



1590 19 5 50 



1661 25 58 40 



1739 12 38 40 



1742 2 41 45 



1748 6 9 24 



1762 15 14 



P 2 VRS\ 



