r 37 v 
VIL Determination of the Heliocentric Longitude of the cie~ 
fcending Node of Saturn. By Thomas Bugge, Profejfor of 
ylftronomy in the Univerfity of Copenhagen ; communicated by 
Sir Jofeph Banks, Bart . P. R. S, 
Read December 7, 1786. 
T HE culmination of Saturn was obferved with a 6-fcet r 
achromatic tranlit-inftrument, and the planet compared «' 
with 0 and 7 r of Sagittarius, whole apparent right-afcenlions in 
the middle of Aliguft 1784 were 282° §(/ 54" and 284° 14' 
33A The meridian altitude was obferved with a 6-feet mural 
quadrant. The original obfervations are to be published in the 
fecond volume of my Aftronomical Obfervations. From thofe 
are calculated the right-afcenlion and declination, the geocen- 
tric longitude and latitude, of Saturn, which are to be depended 
upon to 4 or 6 feconds. Thofe obferved longitudes and lati- 
tudes are compared with the tables of Dr. Halley and of M. 
PE la Lande. In the errors of the tables + fignifies that 
the longitude of the tables is lefs than the obferved longitude ; 
and the meaning of — is, that the calculated longitude is 
greater than the obferved. It ought to be obferved, that the 
heliocentric longitudes of Dr. Halley’s Tables have been cor- 
related for the perturbations after the principles of M. Lambert 
(Memoires de Berlin, pour 1783, p. 216. and Collection des 
Tables Altronomiques de Berlin, tom. IL p. 269.) 
1 
1 7 8 4* 
