THE FACE OF THE SKY FOR AUGUST 



By A. C. D. CROMMELIN, B.A., D.Sc, F.R.A.S. 



Table 47. 



Dale. 



Aug. 



Greenwich 

 Noon. 



Sun. 

 R.A. Dec. 



h. in. 



8 51-9 N.17'6 

 911-1 16-3 



9 30"i i4'8 

 948-8 13-2 



IO 7*3 II '6 



10 257 N. 9*8 



Moon. 

 R.A. Dec. 



h. 111. 



9 48-6 N.i5'i 

 14 129 S. 17-1 

 18 55-9 S. 27-8 

 22 sS'6 H. 77 

 2 34 '6 N.19'3 



7 2l"l N.27'0 



Mercury. 

 R.A. Dec. 



S 53-1 N 12-4 



8 39'5 "3'9 



8 32'9 15'S 



8 377 16-7 



8 54 '8 17*0 



9 22'4 N. lO'l 



Venus. 

 R.A. Dec. 



5 4 8-3N.2i-i 



6 1 2 'o 2 1 "4 



6 36*0 21 '4 



7 o'2 2i'3 

 7 24*7 20*9 

 7 49*2 N.20'2 



Mara. 



R.A Dec 



4 6 - i N.2o*i 



4 19*9 207 



4 33'6 21-3 



4 47"2 21 "8 



5 0*7 22'2 

 5 13-9 22'6 



Jupiter. 

 R.A. Dt 



18 417 

 ■8 39-9 

 18 38-2 

 18 36-9 

 18 35-8 

 ■8 35 -3 



S.23'3 



23 '3 



23-4 

 b.33 4 



Saturn. 

 R.A. De 



56-8 N. 2t -o 



58-7 21-1 



0*5 21*1 



2*1 21*2 



3-6 21-2 

 4*9 N.21 "2 



Ui;inus. 

 R A. Dec. 



h. 111. 



20 31-6 



20 30*8 



20 30*0 



20 29*2 



20 28-5 



20 27*8 



S. ig'6 

 19*6 

 19-7 

 19-7 

 19*7 



S.ig-8 



Table 48. 



P is the position angle of the North end of the body's axis measured eastward from the North Point of the disc. B, L 

 are the helio-(planeto- (graphical latitude and longitude of the centre of the disc. In the case of Mars, T is the time of 

 passage of Fastigium Aryn across the centre of the disc. In the case of Jupiter, L ± refers to the equatorial zone; L 2 to 

 the temperate zone; Ti, T 2 are the times of passage of the two zero meridians across the centre of the disc ; to find inter- 

 mediate passages apply multiples of 9 h 5CU m , 9 h 55l m respectively. 

 The letters in, e, stand for morning, evening. The day is taken as beginning at midnight. 



The Sun continues his Southward march with accelerated 

 speed. Sunrise during August changes from 4.23 to 5.13 ; 

 sunset from 7.49 to 6.48. Its semi-diameter increases from 

 15' 47" to 15' 53". Outbreaks of spots in high latitudes should 

 be watched for. 



Mercury is in Inferior Conjunction at Noon on August 

 4th; then it is a morning star, reaching West Elongation (18° 

 from Sun) on 22nd. Illumination increases from to T V 

 Semi-diameter diminishes from 5i" to 3". 



Venus is a morning star, having passed West Elongation 

 July 4th. Semi-diameter diminishes from 9" to 7". At 



beginning of month § of disc is illuminated ; at end of month 

 J. Being North of Sun it is favourably placed for Northern 

 observers. It is 18' South of Neptune 30 d O h 38 m m. 



The Moon.— New 2 d O h 58 m e; First Quarter 9 d 4* 3" m ; 

 Full 16 d 8 h 27 m e; Last Quarter 25 d O h 18 m m. New 

 31 d 8 h 38 m t\ Perigee 3 d ll h e, semi-diameter 16' 36". 

 Apogee 19 d 8 h m, semi-diameter 14' 44". Maximum Librations, 

 10 d 7° W, 12 d 7° N., 26 d 7° E., 26 d 7° S. The letters 

 indicate the region of the Moon's limb brought into view 

 by libration. E. W. are with reference to our sky, not 

 as they would appear to an observer on the Moon. 



From New to Full disappearances take place at the Dark Limb, from Full to New reappearances. 



The grazing occultation of 136 Tauri on 26th should be carefully observed ; sometimes more than one disappearance or 



reappearance takes place in such cases, owing to irregularities in the lunar outline. 



250 



