202 The New Planet Asia. [No. 11, Vllf series. 



although as before remarked, at the cost of more than double the 

 time and trouble they ought to have given. 



Madras 



Moan Time) 

 1861. 



h. m, S. 

 Am\ 17— i 2 53 40 

 X ,,-M 7 37, 



■II 50 39,15 

 1—13 49 27 15 

 )— 11 46 44,15 

 ,—13 20 12 15 



18- 

 19- 

 20- 



—11 59 5 15 

 -12 13 6 15 



30 



May 1 



—13 31 56 15 

 -10 31 4 15 

 —11 57 33 15 

 — 9 55 49 15 

 —11 58 23,15 

 10 12 56 15 



9 46 11 

 13 0 13 

 11 34 17 

 13 3 18 



—11 12 33 

 13 4 26115 

 13 16 47 15 



—10 15 45 15 



Apparent 

 ht Ascension 



m. 

 51 

 51 

 50 

 50 

 49 

 49 

 49 

 48 

 48 

 45 

 45 

 44 

 41 

 43 

 42 

 42 

 42 

 42 

 41 

 41 

 34 

 33 



Apparent 



iNunober of 



North Pwlar Distance Compari- 

 sons. 



14.76 

 13.56 

 50.72 

 20.72 

 53.93 

 51.84 

 22.97 

 15.72 

 14.04 

 6.30 

 3.26 

 24.56 



19.7a 



39.05 

 54.97 

 48.11 

 4.89 

 1.79 

 17.88 

 13.97 

 17,61 

 30. IS 



6 

 1 



55 



106 

 106 

 105 

 105 49 

 10') 49 

 105 43 

 105 31 

 105 31 



105 

 105 

 104 

 104 



0 

 0 

 54 

 54 



104 47 



104 41 



104 40 



104 34 



104 33 



104 27 



104 26 



103 32 



103 25 



22.9 

 12.7 



7.0 

 50.1 

 26.6 

 55.3 

 57 3 

 31 4 

 51 8 

 30.4 

 32.8 



5.5 

 49.7 

 16.6 

 18.4 



6.8 

 42.4 

 31.8 

 56.3 



3.8 

 58.1 



5 



10 



12 

 9 

 8 

 12 

 13 

 11 

 10 

 8 

 12 

 8 

 9 

 8 

 8 



12 



9 

 10 

 12 

 12 

 14 

 18 



Observer's 

 Initial. 



The magnitude or brilliancy of the Planet has been estimated on 

 ten nights as follows : — 



April 17 12.0 



18 11.7 



19 11.2 



21 11.5 



29 110 



May 



..11.0 

 .11.0 

 .10.8 

 ..10.6 

 ..11.0 



I may here remark, that all estimations of magnitude are based 

 upon my photometric formula for any telescope, viz. — 



Limit of V 



= 9.2 4- 5 X log. aperture in inches : — 



The ratio of light for one magnitude being 2.512, i. e. — that a star 

 of a certain order contains two and a half times the light of the next 

 fainter class. —Thus the naked eye penetrating to the 6th magni- 

 tude, a telescope one inch in aperture will shew Stars of the 9.2 

 magnitude ; one nine inches in aperture the 14th magnitude, &c. &c. 

 Madras Observatory, > N. R. Pogson, 



June 10, 1861. J Government Astronomer, 



I 



