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# Title: Nicolai Mercatoris Holsati, è Soc. Reg. Institutionum Astronomicarum Libri Duo, De Motu Astrorum Communi & Proprio, Secundum Hypotheses Veterum & Recentiorum præcipuas; Deqve Hypotheseon ex observatis constructione (shelfmark Leibn. Marg. 63)
# Folio 206, page id 820424455:0228
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2
LASTRONOMIA.
Lib. L
angulus inveniri poreric. Hujus vero duplum est arci
R AM, e hujus rursus complemencum ad 4. rectos M L. A
arcus, e demissa ex C in M K perpendiculari C N, het
angulus N C M dimidium arcis M L R, e ipla M R bile
cabicur in W. Erso jam in Triangulo rectangulo C. NN
daris M N _ NC M invenietur CM = C A, itemque C N
Porerac vero eriam in Triangulo lupru memorato RSM
(cujus latera RS, SM dabancur cum angulo comprehense
IESM) porerar, inquam, inveniri angulus SRMI; quare
jam in Triansulo rectangulo SOR dacis SR, _ SRO
inveniri porest crus urrumque SO _ RO. FX KN
M N) anter HO, restat ON = =Sa; item ex C N autet
ZN (=50) rectat CQ: ergo in Triangulo rectangul
COS daris duobus cruribus C(, QS, inveniri porest d
SC eccentricitas quaelica, e angulus CS ; cui li addarum
QSM C=SMH supra invento in TrianguloO S RM) con
Habicur CSM, quem auferes denigue ex FS M dato.
rettet FS A, sive distantia aphelii Planerae a loco Fellurio
vertantis in F.
DROBLEMA XVIII.
Distantiam cujusque Planetae a Sole
mediam investigare.
Neriorum ouidem Planetarum distantia media inventa
atuir superiori Problemare, lineq scilicet CM vel C A.
elongationem à Sole observecur ipsorum lonsicudo. Nam
redeundo ad Schema L XI. in Friangulo S T P dantur omnes
ansuli, nimirum BTS differentia veri loci Solis de lonsi
cudinis Planetx observatx; itEm P. S P difterenia veri loc
celluris d loci Heliocenerici Planerae; denique S P dictancsa
Telluris a Sole. Ergo inveniri poret SP dictancia Planetd
250l0