THE FACE OF THE SKY FOR JANUARY. 



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



Table 87. 



Date. 



Jan. 



Greenwich 

 Noon. 



Sun. 

 R.A. Dec. 



h. m. o 



18 44'6 S.23'1 



19 6*6 22'6 

 19 28*5 2i'9 



19 50*0 21 *0 



20 11*3 20 'o 

 20 32-3 i8'9 

 20 53-0 S.17'5 



Moon. 

 R.A. Dec. 



h. tn. o 



22 37-1 S. 9'7 



2 I2'0 N.17'4 



6 50*7 N.27-6 



11 309 N. 2-5 



15 57-2 S. 25-6 



20 46-5 S. 21 "2 



o 29-3 N. 5-4 



Mercury. 

 R.A. Dec. 



17 44'7 



18 i8'i 

 ■8 5*'3 

 '9 27'i 

 20 2*4 



20 37 '8 



21 13*1 



S2 3 -8 

 *4"3 



24 '3 

 23-7 



22'5 



2o'7 

 S.i8-2 



Venus. 

 R.A. Dec. 



h. m. o 



18 i-5S.23'5 

 18 28*9 23*5 



18 56-3 

 ■9 2 3'5 



19 50 '5 



20 17*0 



2.3 '' 

 22 '7 

 21 8 

 20*7 



20 43'i S. 19-3 



Mars. 

 R.A. De 



h. 



7 I2'9N.26'3 



7 4"i 



6 5-,-5 

 6 47 '4 

 6 40-3 

 6 34 '4 



26-6 

 26*9 

 27*1 



27 '2 

 27*2 



6 3o'oN.27*2 



Saturn. 

 R.A. Dec. 



ti. m. o 



4 46*0 N.20'7 

 4 44 '6 20'0 



4 43'4 

 4 42 '3 

 4 4" '4 

 4 4°' 6 



20 '6 

 20*6 



20'6 



20 "6 



4 40'! N.20'6 



Neptune. 

 R.A. Dec. 



57'I 

 S6'5 

 55 '9 

 55'3 

 54 '7 

 54 '= 

 53'6 



N.20'3 

 20 '3 

 20*3 



20"4 



20*4 



20"4 

 N.20"4 



Table 



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. 



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



The asterisk indicates the day following that given in the date column. 



The Sun begins its Northward March. Nearest Earth 

 3 d 9 h e. Its semi-diameter diminishes from 16' 17i" to 

 16' 15£". Sunrise changes from 8 b 8 m to 7 h 44 m ; sunset 

 from 3 h 58 m to 4 h 43 m . 



Mercury is a morning star till 25th, but too near the Sun 

 for convenient observation. Semi-diameter 2J". Illumination 



nearly full. In " Face of Sky for December " read " Mercury 

 is a morning Star," not " evening." 



Venus is a morning star, but getting too near the Sun 

 for convenient observation. Disc practically full. Semi- 

 diameter 5". One degree N. of Mercury, January 14 d 5 h tn. 

 Superior conjunction, February 11th. 



Table 89. Occultations of stars by the Moon visible at Greenwich. 



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



457 



