Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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            <s xml:id="echoid-s5945" xml:space="preserve">
              <pb o="550" file="0280" n="294" rhead="CHRIST. HUGENII"/>
            dem menſis hora 8 p. </s>
            <s xml:id="echoid-s5946" xml:space="preserve">m. </s>
            <s xml:id="echoid-s5947" xml:space="preserve">æquali ſpatio à Saturno remotus
              <lb/>
            apparuit, quibus diebus circa partem ſuæ orbitæ ſuperiorem
              <lb/>
            verſatum conſtat, ſequitur 16 Martii medium locum eum
              <lb/>
            tenuiſſe inter puncta 1 & </s>
            <s xml:id="echoid-s5948" xml:space="preserve">2 circuli modò deſcripti; </s>
            <s xml:id="echoid-s5949" xml:space="preserve">30 verò
              <lb/>
            Martii medium fuiſſe inter puncta 15 & </s>
            <s xml:id="echoid-s5950" xml:space="preserve">16; </s>
            <s xml:id="echoid-s5951" xml:space="preserve">quoniam 14 die-
              <lb/>
            rum intervallum eſt. </s>
            <s xml:id="echoid-s5952" xml:space="preserve">Ac proinde neceſſario perigæus fuit
              <lb/>
            die 23 Mart. </s>
            <s xml:id="echoid-s5953" xml:space="preserve">poſt meridiem circa horam octavam.</s>
            <s xml:id="echoid-s5954" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5955" xml:space="preserve">Cognitis hiſce temporibus deſcribo circulum A B C, qui
              <lb/>
              <note position="left" xlink:label="note-0280-01" xlink:href="note-0280-01a" xml:space="preserve">TAB. XLIX.
                <lb/>
              fig. 1.</note>
            Saturni orbitam deſignet, itemque G F orbitam Telluris, in
              <lb/>
            cujus centro Sol. </s>
            <s xml:id="echoid-s5956" xml:space="preserve">Saturni locum ſumo ad diem 23 Martii
              <lb/>
            1656, hora 8 poſt mer. </s>
            <s xml:id="echoid-s5957" xml:space="preserve">fuiſſe in A; </s>
            <s xml:id="echoid-s5958" xml:space="preserve">quo tanquam centro
              <lb/>
            deſcribo comitis orbitam D E L; </s>
            <s xml:id="echoid-s5959" xml:space="preserve">Tellurem vero eo tempore
              <lb/>
            fuiſſe in G. </s>
            <s xml:id="echoid-s5960" xml:space="preserve">Locus itaque comitis erat in D, ubi recta G A
              <lb/>
            circulum comitis interſecat, ſiquidem perigæum fuiſſe con-
              <lb/>
            ftat. </s>
            <s xml:id="echoid-s5961" xml:space="preserve">Rurſus poſito ad diem 14 Martii 1659. </s>
            <s xml:id="echoid-s5962" xml:space="preserve">hora 8. </s>
            <s xml:id="echoid-s5963" xml:space="preserve">poſt
              <lb/>
            mer. </s>
            <s xml:id="echoid-s5964" xml:space="preserve">loco Saturni in B, tellure vero in F; </s>
            <s xml:id="echoid-s5965" xml:space="preserve">neceſſe eſt comi-
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            tem fuiſſe in H, ubi recta F B ſecat circulum ejus N H K.
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            </s>
            <s xml:id="echoid-s5966" xml:space="preserve">Eſt autem temporis intervallum inter 23 Martii 1656, & </s>
            <s xml:id="echoid-s5967" xml:space="preserve">14
              <lb/>
            Martii 1659, dierum 1086, quibus Saturnus ab A progreſ-
              <lb/>
            ſus eſt ad B: </s>
            <s xml:id="echoid-s5968" xml:space="preserve">Comitem vero ſpatio dierum 16 circuitum u-
              <lb/>
            num abſolvere ſcio, atque inſuper exiguum quid, quod in
              <lb/>
            annis tribus circuitum integrum conficere nequeat. </s>
            <s xml:id="echoid-s5969" xml:space="preserve">Quum
              <lb/>
            igitur diviſis diebus 1086 per 16 fiant 67, atque aliquot dies
              <lb/>
            abundent, apparet 68 circuitus integros noſtri reſpectu co-
              <lb/>
            mitem peregiſſe, quia in H rurſus perigæus fuit. </s>
            <s xml:id="echoid-s5970" xml:space="preserve">Sit B K
              <lb/>
            parallela A G. </s>
            <s xml:id="echoid-s5971" xml:space="preserve">Si igitur 14 Mart. </s>
            <s xml:id="echoid-s5972" xml:space="preserve">1659, comes non in H
              <lb/>
            ſed in K poſitus fuiſſet; </s>
            <s xml:id="echoid-s5973" xml:space="preserve">ſequeretur eum hiſce 1086 diebus
              <lb/>
            ſexagies octies orbitam ſuam decurriſſe fixarum reſpectu,
              <lb/>
            hoc eſt, totidem menſes periodicos, ſive ſidereos potius,
              <lb/>
            Saturni incolis præbuiſſe. </s>
            <s xml:id="echoid-s5974" xml:space="preserve">Nam quando rectæ A D, B K
              <lb/>
            fecundum quas ex Saturno comes proſpicitur, inter ſe paral-
              <lb/>
            lelæ ſunt, eundem inter fixas locum illis obtinere cernitur. </s>
            <s xml:id="echoid-s5975" xml:space="preserve">
              <lb/>
            Nunc verò inſuper arcum K H emenſus eſt, qui totidem eſt
              <lb/>
            graduum quot apparenti motu Saturnus inter prædicta duo
              <lb/>
            tempora tranſivit; </s>
            <s xml:id="echoid-s5976" xml:space="preserve">quoniam angulus H B K æqualis eſt ei
              <lb/>
            quem conſtituunt rectæ F B, G A, motus apparentis </s>
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