OBSERVATIONS OF ENCKE S COMET. 



313 



No. 



Observation. 



Philadelphia Siderial Time. 



Remarks. 













*^' = (^ + 37^817) 



1842, Aprilll. 



54 



Comet 



on m 



= 30 



S^ 53"" 23^6 



Clock's rate +7^2. 



55 



<( 





m 



= 40 



53 40.9 



Bar. not noted. 



56 



Star k 8, 9 mag. 





m 



= 30 



55 5.0 



Att. therm. 68°. 



57 



(( 





m 



= 40 



55 22 .5 



* ft' is clock time, 



58 



Star 1 9th mag. 





m 



= 30 



55 53 .4 



fast 37^.82 of sid. 



59 



C( 





m 



= 40 



56 10.3 



time. 



GO 



Comet 





ra 



= 30 



57 47 .2 





61 



(( 





m 



= 40 



58 .2 





62 



Stark 





m 



= 30 



59 24 .6 





63 



(( 





m 



== 40 



59 42 .8 





64 



Star I 





m 



= 30 



9 12.5 





65 



(( 





m 



= 40 



31 .7 





The true right ascensions and declinations of the stars of comparison, on the 

 evenings of observation, were as follows : — 



o — Ih 46m 



1 46 



1 46 



1 49 



1 



1 



1 



2 



1 



1 



1 



2 



2 



2 



2 



2 



2 



c 



(( 



d 

 e 



f 



g 



49 

 49 

 50 



1 

 59 

 59 

 59 



3 

 17 

 31 

 31 

 32 

 32 



11M8, a' 

 11 .28, " 

 10 .55,-6' 

 25 .88, c' 

 25.51, " 

 41 .70, d' 



5 , e' 

 4 .60,/ 

 6,71,^' 



6 .51, " 

 6 .01, " 



52 .90, A' 

 18 .20, i' 

 58 .31, k' 

 58.10, " 



46 .87, r 



47 .35, " 



+ 16° 46' 



16 46 



16 41 



16 46 



16 46 



16 52 



16 59 



17 15 

 17 16 

 17 16 

 17 16 

 17 16 

 17 17 

 15 

 15 

 14 57 

 14 57 



26".04, * 



31 ,26, 

 24 .72, 



1 .69, 

 8 .32, 



32 .70, 

 20 , 

 12 ,90, 

 29 .60, 



33 .80, 

 29 .60, 

 51 .50, 



.70, 

 18 .69, 

 20 .83, 

 48 .28, 

 51 .90, 



9 

 9 

 9 



8 

 8, 9 



10 



11 



10 

 7,8 

 7,8 

 7,8 



10 

 9,10 

 8, 9 

 8, 9 



9 



9 



mas' 



Bessel's Zone, 394 



Lalande, H. C, p. 192 



Bessel's Zone, 394 



Lalande, H. C, p, 192 

 Anonym, Approx, 



Bessel's Zone, 



it n 



Piazzi. 



Anonym. Approx. 



(( (< 



Bessel's Zone, 



394 

 332 



394 



141 



141 



32 



The measures and transits observed with the filarmicrometer have been 

 reduced by the formulae of Bessel in the Astr. Nachr., No. 69, and in the 

 Konigsberg Observations, Vol. XV., p. 22. Those of the same star have been 

 referred to a common epoch by means of Encke's Ephemeris. The probable 



