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KNOWLEDGE. 



June, 1913. 



Mars is a morning St;ir, but not yet well placed for 

 observation. 



Jupiter is in opposition on July 5th. Polar semi-diameter, 



21*". 



Table 44. 



Configuration at ll h e for an inverting telescope. 



Satellite phenomena visible at Greenwich, l d 2 h l m m I. Oc. 

 R., 8 h 44 m e I.Sh. I., 8 h 49 m e I.Tr. I., ll h 2 m e I. Sh. E.. ll h T"e 

 I.Tr. E.; 2 d 8 h 27 m i; I. Oc. R.;4''2 h \9™m II. Sh. I.. 2" 23 m m 



II. Tr. I.; 5 d 8" 29 ra e II. Oc. D., ll h 15 m 38 s II. Ec. R. ; 

 6 d 10 h 19 m lII.Tr. E., 10 h 27 m III. Sh. E. ; 8 d l h 26 m m I. Oc. I).. 

 3 h 45 m 52" I. Ec. R., 10 h 33 m e I. Tr. I., 10 h iS m e I. Sh. I. ; 

 9 d O h 51 ra m I. Tr. E . O h 56"'/« I. Sh. E., 10 h 14" 26'e I. Ec. K. ; 

 12 d 10 h 42 m e II. Oc. D. ; 13 d l h 51 ra 47 s II. Ec. R., 10 h 19"V 



III. Tr. I., ll h 10%; III. Sh. I.; 14 d l h 36 ra m III. Tr. E., 

 2 h 27 m w III. Sh. E., 8" 34% II. Tr. E., 9 h 2% II. Sh. E. ; 

 15 d 3 h 10 m w I.Oc.D.; 16 d h 17 m m I. Tr. I., h 33%» I.Sh. I.. 

 2 h 35%;; I. Tr. E., 2 h 51%;; I. Sh. E., 9 h 37% I. Oc. D. ; 



17 d O h 8 m 56 8 m I. Ec. R., 9 b 1% I. Tr. E., 9 h 19% I. Sh. E. ; 

 20 d O h 58%;; II. Oc. D.; 21 d l h 37%» III. Tr. I., 8 h 47 m e II. 

 Sh. I., 9 h 35 ra e IV. Tr. I., 10 h 49% II. Tr. E., ll h 37% II. Sh. 

 E., 22 d O h 25 ra m IV. Tr. E., l h 22 m m IV. Sh. I. ; 23 d 2 h 2 m m 

 I. Tr. I., 2 h 27%;; I. Sh. I., ll h 21% I. Oc. D., 24 d 2 h 3 m 30 8 m 

 I. Ec. R., 8 h 28% I. Tr. I., 8 h 35 m 53 8 e III. Ec. R., 8 h 56% I. 

 Sh. I., 10 h 46% I. Tr. E., ll h 14% I. Sh. E. ; 25" 8 h 32 m 10 8 e 



I. Ec. R. ; 28 d 10 h 16% II. Tr. I., 1 l h 23% II. Sh. I. ; 29 d l h 6%ra 



II. Tr. E., 2" 13%w II. Sh. E. ; 30 d 8 h 23 m 43 8 e II. Ec. R. ; 

 31 d l h 6 m m I. Oc. D., 10 h 13% I. Tr. I., 10 h 51 m e I. Sh. I. 



Near the time of opposition, the satellites, when crossing 

 the disc, are very close to their shadows. 



Meteor Showers (from Mr. Denning's List) : — 



The Perseids may be seen from July 19th, radiant 23° + 52 c 

 advancing 1° per day in R.A. 



Saturn is badly placed, having been in conjunction with the 

 Sun on May 29th. 



Uranus is in opposition on 29th. Semi-diameter, If". 



Neptune is too near the Sun for observation, being in 

 conjunction on the 19th. 



Double Stars and Clusters. — The tables of these given 



last year are again available, and readers are referred to the 

 corresponding month of last year. 



Variable Stars. — Tables of these will be given each 

 month ; the range of R.A. will be made four hours, of which two 

 hours will overlap with the following one. Thus the present 

 list includes R.A. 16 h to 20 h , next month 18 h to 22 h , and so on. 



226 



