Till-: l^\C"l' Ol- TIIK SKY FOH AUGTST. 



By A. C. 1). ( KOMMIII.IN. |;.A., U.S. .. F.K.A.S. 



Greenwich 



Noon. 



Aug. 3 . . . 



.. S ... 



• t <3 ... 

 .. l8 ... 

 1. 13 ... 



o 35 o N. 3-3 

 4 51-7 N.J7-0 

 10 13-9 N.I4-8 

 ■ 4 30 4 S. 17-3 



IS 57-,, S. j8-o 



Mercury. 

 R.A. Dec. 



10 95-1 



ID 97 '6 



54 '6 



Venui. 

 R.A. Dec. 



»3< N. 5"4 



Jupiler. 

 K.A. Dec 



S.»-7 



Saturn. 

 R.A. Dec. 



Uranus. 

 K.A. Dec 



Table 26. 



T.ABLE 27. 



P is the position aii^le of {he. North end of the body's axis measured eastward from the North I'oint of the disc. B, L 



are the helio-(planeto-)gi-aphical latitude and longitude of the centre of the disc. In the case of Jupiter Li refers to the 



equatorial zone, L-, to the temperate ;{ones. Ti T-j are the times of passage of the two zero meridians across the centre of the 



disc ; to find intermediate passages apply multiples of 9'' sOi'", 9*" 55^"" respectively. 



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



Till-: Sun moves South pretty rapidly. Sunrise during 

 August changes from 4-26 to 5-13 ; sunset from 7-46 to 6-47. 

 Its semi-diameter increases from 15' 47" to 15' 53". 



Mekcury is an evening Star till the 22nd, when it passes 

 Inferior Conjunction and becomes a morning star. On August 

 1st. one-third of disc is illuminated, semi-diameter 4i"; on 

 August 31st, one-sixth of disc is illnmiuated. semi-diameter 

 4i". 



Venus is an evening Star, but too near the Sun for 

 convenient observation. Illumination nearly complete, semi- 

 diameter 5". 



The Moon. — Last Ouarter 6"* 4" IS"'h; ; New \Z^ 7" 5S"'t.' : 

 First Quarter ig"* 4'''57'"e; Full 27'' 7" 59'"f. Perigee 

 12'' 10'«i, semi-diameter 16' 44"; (only 3" less than the very 

 high value last January); Apogee 25'' g^w, semi-diameter 

 14' 44". Maximum Librations, August &^, 8° E., lO"* 7° S., 

 18" 8° \V., 23" 7° N. The letters indicate the region of the 

 Moon's limb brought into view by libration. F. W. arc with 

 reference to our sky, not as they would appear to an observer 

 on the Moon. 



Mars is an evening Star, but practically invisible. 



Jupiter is an evening Star, increasing its distance from us, 

 so that the etjuatorial semi-diameter diminishes from 20i" to 

 18-V'. The Polar is smaller by 1:1 ". The configurations of the 

 satellites at 9*" e are for an inverting telescope (see Table 29). 



S.atellite phenomena visible at Greenwich, 3'' g"" 50™ 

 III. Tr. £., 9" 58"" II. Tr. I., 11" 25™ I. Oc. D. : 4" 8" 39"° 

 I. Tr. I., 9" 50"" I. Sh. I.. lO"" 53"" I. Tr. E. ; 5'' 9" 15"" 57* 

 I. Ec. R.. 9" 37"" 25" II. Ec. K. ; ll"* lO" 31"" I. Tr. I.; 

 12" 7" 44"" I. Oc. D.; 13" 8'" 29"" I.Sh. E. ; H"" 8" 43"° 34" 

 III.Ec. R. ; 19" 9" 37'"I.Oc. D., 9''37'" II. Oc. D. ; 20" 8" IC" 

 I. Sh. I., 9" 7" I. Tr. E., lO" 24"* I. Sh. E. ; 21" 7" 34" 15" 

 I. Ec. R., 7" 35"" III. Oc. R., 9" 26™ II. Sh. E. ; 27" 8" 47™ 



I. Tr. I., 10" 5™ I. Sh. I.: 28" 9" 13"" III. Oc. D., g*" 20"" 



II. Sh. I., 9'' 28'" II. Tr. E., 9''29"' 7" I. Ec. R. ; 30" 6" 49"" 42' 

 II. Ec. R. 



All the above are in the evening hours. 



The eclipse reappearances of I. II. and both phases of 

 those of III. occur high right of the inverted image, taking 

 the direction of the belts as horizontal. 



Table 28. Occultations of stars by the Moon visible at Greenwich. 

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



258 



