382 



KNOWLEDGE. 



October, 1913. 



Mars is a morning Star, in Gemini, semi-diameter 6", defect 

 of illumination over a second. It passes its stationary point 

 on November 27th, and will reach Opposition early in January, 

 so the season of observation has commenced. The North 

 Pole is now turned towards us. 



J upiter is now very low in the West. Polar semi-diameter, 

 16" in mid-November. 



Table 68. 



Configuration at 5 h e for an inverting telescope. 



Satellite phenomena visible at Greenwich, l d 7 h 55 m I. Oc. 

 D., 8 h O m II. Tr. I.; 2 d 5 h ll m I. Tr. I., 6 h 21 m I. Sh. I., 

 7 h 30 m II. Tr. E. ; 3 d 5 h 50 m 20 s I. Ec. R.. 7 h 56 m 52" II. 

 Ec. R.; 5 d 6 h 44 m III. Sh. E. ; 9 d 7" ll m I. Tr. I.; 10 d 4 h 24 m I. 

 Oc. D., 5 h 31 m II. Oc. D.; ll d 5 h 5 m I. Sh. E. ; 12 d 5 n 5 m 

 II. Sh. E., 6 h 22 m III. Tr. E., 7 h 14 m III. Sh. I.; 17 d 6 h 23 m 

 I. Oc. D. ; 18 d 4 h 41 m I. Sh. I., 6 h m I. Tr. E., 7 h m I. 

 Sh. E.; 19 d 4 h 8 m 59 s I. Ec. R., 4 h 47 m I. Sh. I., 5 h 42 m II. 

 Tr. E. ; 23 d 4 h 48 m 38 9 III. Ec. R. ; 24 d 5" 6 m 16" IV. Ec. D.; 

 25 d 5 h 42 m I. Tr. I.; 6 h 36 m I. Sh. I.; 26 d 5 h 37 m II. Tr. I., 

 6 h 3 m 52" I. Ec. R., 28 d 5 h 10 m 49" II. Ec. R. All these are in 

 the evening hours, the planet setting before midnight. Atten- 

 tion is called to the double eclipse of 3 d . The eclipses take 

 place to the east of the disc, or to the right in an inverting 

 telescope. 



Saturn is a morning star, in Taurus, in a good position for 

 observation. Polar semi-diameter 9 J". P. is — 4°-7; ring 

 major axis 47J", minor 21". The ring is very widely open. 

 It is of interest to examine the exact amount of overlap 

 beyond the planet's pole. 



East Elongations of Tethys (every fourth given), l d 5 h -4m, 

 8 d 6 h -5e, 16" 7 h -7*n, 23 d 8 h -9e, Dec. l d 10 h -lm; Dione (every 

 thirdgiven),3 d 10 h -3m,ll d 3 b -3e,19 d 8 h -3e; 28 d l h -2w; Rhea 

 (every second given), 8 d 10 h -9e, 17 d ll h -5e, 27 d b -2*n. 

 For Titan and Iapetus E.W. mean East and West Elonga- 

 tions ; I. Inferior (North) Conjunctions, S. Superior (South) 

 ones. Titan,2 d 3 h -7eI.,6 d h -leW.; 10 d ll h -3m S., 14 d l h -9e 

 E., 18 d l"-6 d e I., 22 d 9 h -8m W., 26 d 9 h -0m S., 30 d ll h -5mE.; 

 Iapetus, 8 d 8 b -2m W., 27 d 2-4 b w S. 



Uranus is an evening star. Semi-diameter, lj". At lf° S. 

 of p Capricorni. 



Neptune is a morning star, entering Cancer. Stationary 

 at beginning of November. 



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



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. h to 4 h , next month 2 h to 6 h , and so on. 



Table 69. Non-Algol Stars. 



/3 Lyrae minima Nov. 8 d 5 h e, 21 d 3 h e, Period 12 d 21 -8 h . 

 Algol minima Nov. 5 d 2 h 8 m w, 7 d 10 h 57 m e, 10" 7 h 46 m e, 13 d 4" 35 m e, 28 d h 40 m m, 30 d 9 h 29 m e, Period 2 d 20-8\ 



