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# Title: [Astronomiae Physicae & Geometricae Elementa] Astronomiæ Physicæ & Geometricæ Elementa (shelfmark Leibn. Marg. 124)
# Folio 420, page id 1040780814:0438
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ASTRONOMLE PAFSTCA.
4.20
meta quarto obserrato) et L atitudo Cometa ad dictum ex punctum,
(Tc. in triansulo spharico rectansulo duo latera circa angulum re-
ctum;) dabitur Inclinatio hypochenula sive Vix Cometica ad L.
clipricam.
no LCliPEICa, neMDC PHNE, Sa I Spatio Mundano Orbita
ML. N, punctis N, H, B, M e L eadem qua prius denotantibus: Cid
PIaEUT P R ad EM ut spatium inter Obserrationem primam Tem
Pulque datum, ad quod Cometa LOcus quaeritur, ad Tempus inter
Obserrationem primam ec quartam: Inveniatur POrrO (Pex PTOP.
XVHI. Lib. IHI.) Terra Locus ad Tempus propositum, sc. e punctum.
Rectae ex, cujus ucrumque extremum punctum a e x nocum elly
L+V. V.
momentum quando CBMMILLA CH IH LOUO dCCuI Ceiam LOcuS Terra
d ictud momencu, dabitur (per LO. Dat.) poscio recta puncta
hacce conjungentis, HC eAt, Lonsicllao Concca in irodo verlan.
tis. Porro, quoniam dantur Distantia PTodi a puncto H (L. OCOC0
invenire
PROPOSITTO XTII
PEx PrOP. PraC. determinetur restisium Orbita Cometa In pla-
Isdem positis, ad datum Tempus Locum Cometae e Ferra visum
Dolitio (per 26. Dat. data) dat Cometa Fonsitudinem guasitam.
POrTO, CapIatuT R V ad R N SICUE M F ad P N, eritque L atitudo C0
metae ad Tempus datum angulus cujus radius eA OR _E tanSCNS
recta RV.
Atque Notus Cometa F phemerides hoc modo construentur ret
sraphice vel per calculum.
SCFOLTUM.
Similiter invenietur Distantia Cometa d Terra, vel in Perisxo
vel ad Tempus datum, tam curtata quam in sua Prajectoria, in
Partibus Diametri Orbis magni exprecta; angulus item quem CO
metxe Trajectoria continet cum recta Cometam _ Terram jun
sente; vel quem Orbita rostisium in plano FCliptiex continet cum
recta d Terra ducta ad Locum Cometa in F Cliptica.
GOROLLARTUM.
Hinc Maenicudo vera tam ipsius Cometx tuctei, quam huic
circum.