•- 



PROF. COPELAND AND DR L. BECKER ON NEW STAR IN AURIGA. 



small star, which forms an equilateral triangle with it and the place of the Nova, is set 

 down as 12 ,m 7. 



On March 28, when it had fallen to ll ,m 9, it could no longer be seen through a 

 prism which gave a distinct spectrum of the neighbouring 9 ,m 9 Bonn star. Hence we 

 may certainly conclude that on this day the light of Nova Aurigae was far from 

 monochromatic, or it would have been visible through a prism. 



Observed Magnitudes of Nova Aurigce. 



Day. 



Hour. 



Magnitude. 



Comparison Stars and Remarks. 



Instrument. 



1892. 



h 









Feb. 1. 



6.1 



5-56 



26 Aurigae ; Nova strong yellow. Image strictly 

 stellar afterwards in the 24-inch telescope. 



F.G. 



2 



8.1 



556 



26. Nova seen with naked eye. 



»> 



„ 3. 



9.4 



513 



26 and x Aurigae. 



5) 



„ 4. 



8.1 



5-0 



X- 



>) 



„ ,5. 



7.3 to 9.8 



465 



26 and x- 



)> 



„ 6. 



6.5 and 7.8 



4-55 



X- 



)) 



„ 7. 



12.0 



3-80 



X ; moon very near ; Nova seen with unaided eye. 



)) 



„ 8. 



6.0 and 11.1 



4-09 



26 and x- 



)) 



„ 9. 



7.8 



5-03 



26 and %. 



>> 



■ „• io. 



8.8 and 11.1 



5-0 



26 and x- 



)> 



„ 11. 



10.0 



5-0 



X 



)> 



„ 16. 



8.3 and 8.8 



5-87 



26 and D.M. + 30° 898. 



O.G. 



„ 17. 



6.9 to 12.2 



5-43 



26, 898, and x> Nova certainly brighter than last 

 night. 



F.G. 



„ 18. 



7.8 to 12.4 



5-38 



26 and x- 



») 



„ 19. 



8.3 and 9.2 



5-10 



X- 



)> 



„ 22. 



11.1 



576 



X- 



>> 



„ 29. 



7.9 



5-76 



26. 



j> 



Mar. 5. 



9.6 



5-58 



X- 



)! 



v 8 - 



9.7 



6-26 



26. 



O.G. 



„ 18. 



8.9 and 9.3 



8-58 



D.M. + 30° 912 and 913. 



3|in. 



» 19. 



9.8 



8-9 



913 and + 30° 932. 



>> 



„ 20. 



9.0 and 9.5 



9-1 



913, 932, and Bonn star of 1858. 



3| and 24 in. 



„ 23. 



9.4 



9-7 



Bonn star. 



24 in. 



„ 24. 



11.6 



100 



Bonn star. 



n 



» 25. 



10.8 



10-7 



Bonn star and p * of a pair sf= f . 



" 



„ 28. 



8.7 



11-9 



f and faint star of triangle = g. 



" 



„ 29. 



9.0 



12-4 



g- 



" 



,, 30. 



9.0 



12-6 



g- 



" 1 



Apr. 1. 



9.1 



12-9 



g and next * to s. 



" 



The instruments used were F.G., a large field-glass ; O.G., two different opera-glasses ; 

 a 3^-inch refractor by Cooke, with a power of 27 ; and, lastly, the 24-inch Grubb reflector 

 and a power of 138. The silvering of the last-named instrument is at present somewhat 

 thin and imperfect. 





