312 



OBSERVATIONS OF ENCKE S COMET. 







Philadelphia Siderial Time. 



Position. 



Turns of 

 Micrometer 



Measured 

 Distance. 





No. 



Observation. 









Screw. 



Remarks. 







^ 





S'. 



m. 



s'. 





13 



Comet from Star c 8th mag. 



7h 37m 



55M 





27.054 



693".31 



1842, March 28. 



14 



(( 



40 



51.1 





27.687 



709 .53 



Bar. 30.11. 



15 



(( 



44 



14.1 



50° 34' 







Att. therm. 44°.5 



16 



(< 



45 



17.1 



50 16 







The comet had a 



17 



d 10th " 



49 



16.1 





12.006 



307 .67 



tail 3' IG" in 



18 



(( 



50 



54.0 





12.078 



309 .52 



length, very 



19 



(( 



51 



50.0 



76 45 







faint. 



20 



<< 



52 



55.0 



76 25 







Position 55°. 



21 



e 11th " 



8 



2.0 





11.402 1*292 .20 



* Comet from star 



22 



(( 



4 



23.0 





10.707 274 .39 



e, position 167° 



23 



(( 



7 



23.0 





12.872 



329 .87 



nearly. 



24 



li 



8 



47.0 





12.928 



331 .30 





25 



c 



13 



27.9 





29.875 



765 .60 





26 



(( 



19 



46.9 





29.537 



756 .93 





27 



(( 



21 



39.9 





30.666 



785 .87 





28 



it 



23 



25.9 



53 15 









29 



(( 



25 



32.9 



53 8 









30 



■ 



29 



5.9 



53 58 























1842, March 31. 



31 



Comet from Star f 10th mag. 



71. 52m 



14'.8 



232° 19' 







Bar. 30.03. 



32 1 " 



54 



34.8 





6.704 



171".81 



Att. therm. 46°. 



33 



a 



56 



38.8 





6.628 



169 .86 



No. 32 doubtful. 



34 



(< 



8 



18.8 





6.983 



178 .95 





35 



«( 



3 



58.7 





6.348 



162 .68 





36 



<( 



5 



33.7 



225 44 









37 



<( 



8 



23.7 



223 57 









38 



Diameter of nebula. 



11 



47.7 





1.253 











* / = (^ + 22^412) 









Clock's rate+6^7. 



39 



Starg7,8mag. onm=30 



8 32 



30.4 









* fx' is time by 



40 



Comet onm=30 



34 



26.4 









clock, fast 22M1 



41 



Star g onm=30 



35 



59.4 









of sid. time. 



42 



" onm=37.424 



36 



11 .8 











43 



Comet onm=30 



37 



52.6 











44 



" onm=37.424 



38 



6.1 

























1842, April 1. 



45 



Comet from Star h 10th mag. 



7h 50" 



51M 



. 



20.667 



529".63 



Bar. .30.16 in. 



46 



(( 



53 



51 .1 





20.817 



533 .47 



Att. therm. 50°. 



47 



(( 



55 



46.1 



91° 39' 







Comet had a tail 7' 



48 



(( 



59 



21 .1 



91 37 







in length, faint. 



49 



t( 



8 11 



24.0 





21.233 



544 .13 



Position 56° 

















1842, April 5. 



50 



Comet from Star i 9.10 mag 



gh 22" 47^5 



139° 10'.5 







Bar. 29.94. 



51 



<( 



24 



20.5 



139 40 







Att. therm. 57°. 



52 



(( 



26 



10.5 



138 









53 



(( 



42 



12.4 





36.670 



939'.73 





