Opuscula . 
3^9 
PAULLI FKISII 
CLEKIC. KEGUL, S. PAULL 
De accektatione y 6t retardatione motus Flanetarum . 
I Planeta aliquis C QFig. i.) in orbita elliptica Z C s- C 
circa focum T revolvatur , & Planeta alius H-atUdtur iii 
loco A , & fmt C H , A O perpendiculares ex C , A du- 
ttae ad CT, & AT ^ vis qua Planeta C alterius Flanetac 
aclione fecundum lineam radio veftori C T perpendicularem 
^ ... . . AT.AO AO AT.CH CH 
lollicitabitur , erit — — — ~ 
AT.AC' AT* CT.AC' CT.AT* 
A T . C H cll 
. ____ ^ — — — . Tum fi fiat fmus 
CT.(AT*-+-CT^ — lAT.TK)^ CT.AT 
C H T H 
anguli CTH = — r^j, cofmus — ;>r , pofito finu toto 
= I , diflantia Planetae attrahentis a foco T A ~ a ^ femiaxis 
major ellipfeos DZ ~<^, minor DP — c, excentricitas TD 
= , & centro T, ac radio TB, qui asquetur (emiaxi majo- 
ri ellipfeos , defcribatur circulus PB;;, ac fit inluper TN — 
X ; erit ex conicis T C = , atque his omnibus valo- 
b ^ X 
ribus fubflitutis fuo loco fmgulis, evadet vis radio vedori 
orbitae eilipticse perpendicularis — — 
V4 
(2 h c % ah c T\i 
9X 
1 • 
a 
Quae ut rite in feriera fo rmula evolvatur , cum de Pri- 
mariis Planetis agitur , ob modicam orbitarum excentricitatem 
negligi polfunt quadratic^ , & plufquam quadraticr^: excentri- 
citatis iplius poteitates . Scilicet fieri debet — (p^ ^ h^y 
b -4- 2 (p A , — z=. 1 ckb X -t- 
