Occultation of 64 Aquarii by Jupiter, Sep. 14th, 
1879. 
By Joun Tessutt, F.R.A.S. 
[Read before the Astronomical Section, 4 July, 1879.] © \ 
ronomical column of Vature for December 19th, 1878, 
announced that in all probability the star 64 Aquarii of the 
hire observers with more details respecting it. . For 
ee Ihave deduced the following apparent places of the 
t, by means of second differences, from the ephemeris in the 
Nautical Almanac :-— 
ad. h ob Ae 
, h. m8 
Sep. 14 1 Greenwich M. Time, R.A.—22 32 59°48. N.P.D.=100 39 £0 
eae nS 9832 SBE) 4, WO SS 
The is eeu ea » 22 32 57:18. 100 39 18°0 
‘mean place of the star for the beginning of 1864, given in the 
Teenwich Catalogue for that year is RA.=22h. 32m. 650s, 
0° 44’ 4-7” 1 Jeterminations with 
+ 
ties o : 
Nl ose of the occultation becomes R.A. = 22 
Boni. 100° 39’ 0-7”. As the equatorial horizontal parallax of 
Planet will be only 2-2”, and the planet itself will cross the 
on at an altitude of 67 
‘ANE nt 
«eration the elliptic form of the planet’s disc. Adopting 23-9", 
‘tore, as the mean of the equatorial and polar semi-diameters 
