r. Si s fiierft = o, fivc Planeta Prima- 

 rius deflrueretur, Satellite in oppoficione exfi- 

 ftente; eric Cof z = i,M = r, Z) = ot4-i & 



\ -\- r i/i -\-m 



N-= — — . r » unde Semi-Axis Principalis 



r fM 



~, & Semiaxis conjugatus 



Similitcr fi 2;=i^o, 

 |/^m (r* — 2r — i) — r-|-r 

 five Satelks in conjun£tione, vel Cof.2; = — l; cric 



r — I \/m — l 



M=i,D=m—i,N= V , atquc Semiaxes 



r m 



r' m.m • — i 



in & 



m{r^ -{-2r — l)-fr — i 



. . •j- 



r — r .m — i 



|/ m ( r^" -f- 2r — I ) -+- r — l' 



2. Qiioniam trajeQroria eft Parabola fi .V* = 

 a, inveniri posfet locus Sacellitis in orbita pro- 

 pria, ut orbita Solaris fit Parabojica, per Re- 

 folutionem squationis tertii gradus: (i-f-r* -f- 



2 r Cofz ) .Vi + m^ -f-2 m Cof s = 2r' m. Ope au- 

 tem yEquationis hujus fic propofits: Cof . z = 



Vi-^m' + zm Cofa zr ar * ^^' ^^°' 



xime 



