3. 



CORRECTED ELEMENTS OF XEPTUNE. 



[From the Monthly Notices of the Royal Astronomical Society (1847). Vol. vn.] 



THE following results respecting the orbit of the recently discovered 

 planet Neptune may, perhaps, not be uninteresting to the Society. They 

 are deduced from the early Cambridge observations of August 4 and August 

 12, combined with nine later ones made at the same observatory, those 

 being generally selected where the planet was observed with the equatorial 

 and meridian instruments on the same day. To each element found I have 

 annexed the probable error to which it is subject, in order that it may 

 be judged what reliance may be placed upon the value obtained. It will 

 be seen that some tolerably definite information respecting the orbit is 

 already afforded by the observations, though they are, of course, insufficient 

 to determine, even roughly, all the elements. 



Epoch 1846, Aug. 8-0, G. M. T. 



True Long, of the Planet, M. Eq. 1847-0 326 41' 12"'3 2"'55 



Motion in Longitude in 100 days 36'5 //> 52 2"'82 



Distance of Planet from the Sun 30'0080'0312 



Change of distance from the Sun in 100 days ... -0 '01 947 0-0365 



Heliocentric Latitude, South 30'34"-35 2"'24 



Increase of Heliocentric Latitude in 100 days 1' 4"'44 2"'05 



