Tin-: I'.xcR OF 'I'lii-: sky i-ok i)i-(i;\iiU':h 



Hv ,\. C. I>. ( KOMMI.LIN. I'.. A.. D.Sc. 1-.R..\.S. 



Table 47. 



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. 



The letters m, e stand for morning, evening. The day is 

 taken as beginning at midnight. 



The Su.\ moves South till December 22ud, reaching the 



Solstice at 5^in on that day. Sunrise during December 

 changes from 7-44 to S-S ; sunset from 3-53 to 3-5S. Its 

 semi-diameter increases from 16' 15" to 16 IS". Nearest 

 Earth 1913, January 1st. 



Mercury is an evening star till December Sth. then a 

 morning star. At greatest elongation 22" - 4 W. December 2Sth. 

 Illumination, December 1st one-fifth, December Sth zero, 

 December 31st seven-tenths. 



Venus is an evening Star, approaching its greatest elongation. 

 Illumination three-quarters, semi-diameter 71". 



The Moon.— Last Quarter l" 11" S^m ; New S"" 5" 7°'c ; 

 First Quarter 16" S"" (>'°e; Full 24'' 4"" 30'"m : Last Quarter 

 30'' 8''l2"'<;. Apogee 14'' 7''m, semi-diameter 14' 47"; Perigee 

 26'' 3''ot. semi-diameter 16' 32". Maximum Librations, Decem- 

 ber 6'' 5° \V., 10" 7° N., 20" 7° E., 24" 6° S. January l" 6" \V. 

 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. 



Table 48. Occultations of stars by the Moon visible at Greenwich. 

 From New to Full disappearances occur at the Dark Limb, from l-'ull to New reappearances. 



446 



