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

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            <s xml:id="echoid-s5912" xml:space="preserve">
              <pb o="549" file="0279" n="293" rhead="SYSTEMA SATURNIUM."/>
            Apr. </s>
            <s xml:id="echoid-s5913" xml:space="preserve">Itemque eodem anno die 3 & </s>
            <s xml:id="echoid-s5914" xml:space="preserve">19 Apr. </s>
            <s xml:id="echoid-s5915" xml:space="preserve">idem ſitus fue-
              <lb/>
              <note position="right" xlink:label="note-0279-01" xlink:href="note-0279-01a" xml:space="preserve">TAB. LI.
                <lb/>
              fig. 3.</note>
            rat deprehenſus; </s>
            <s xml:id="echoid-s5916" xml:space="preserve">nec non 13 & </s>
            <s xml:id="echoid-s5917" xml:space="preserve">29 ejuſdem menſis. </s>
            <s xml:id="echoid-s5918" xml:space="preserve">Hiſce
              <lb/>
            igitur animadverſis, circulum deſcripſi orbitam comitis refe-
              <lb/>
            rentem, in cujus centro Saturnus eſſet, atque in partes 16
              <lb/>
            diſtribui, uti Schema ſubjectum exhibet. </s>
            <s xml:id="echoid-s5919" xml:space="preserve">In eo comitem,
              <lb/>
            ſecundum ſignorum ordinem, circumduxi; </s>
            <s xml:id="echoid-s5920" xml:space="preserve">nulla tum qui-
              <lb/>
            dem obſervatione ut ita ſtatuerem cogente, ſed quod in
              <lb/>
            eam partem Luna quoque noſtra & </s>
            <s xml:id="echoid-s5921" xml:space="preserve">Jovis comites deferren-
              <lb/>
            tur. </s>
            <s xml:id="echoid-s5922" xml:space="preserve">Poſtmodum autem ſtabilita hypotheſi, qua phæno-
              <lb/>
            mean anſarum explicantur, patuit recte ita hunc morum me
              <lb/>
            conſtituiſſe. </s>
            <s xml:id="echoid-s5923" xml:space="preserve">Porro in hoc circulo locum comitis quærendo
              <lb/>
            quo in prima noſtra obſervatione ſtetiſſet, ſæpiuſque eun-
              <lb/>
            dem retractando, ut obſervationibus per id tempus habitis
              <lb/>
            congruerent etiam reliqua loca in circulo comiti aſſignata; </s>
            <s xml:id="echoid-s5924" xml:space="preserve">ita
              <lb/>
            demum commodiſſimè repreſentari omnia viſum eſt, ſi pri-
              <lb/>
            ma obſervatione, nempe 25 Mart. </s>
            <s xml:id="echoid-s5925" xml:space="preserve">1655, ad numerum 12
              <lb/>
            comes reponeretur, 3 partibus cum dimidia, qualium 16 cir-
              <lb/>
            cumferentia continet à loco perigæo B remotus; </s>
            <s xml:id="echoid-s5926" xml:space="preserve">nam dia-
              <lb/>
            metrum AB ad viſum noſtrum vergere ponimus, & </s>
            <s xml:id="echoid-s5927" xml:space="preserve">utraſque
              <lb/>
            hujus epicyclii apſides determinare. </s>
            <s xml:id="echoid-s5928" xml:space="preserve">Fuerit igitur 26 Mart.
              <lb/>
            </s>
            <s xml:id="echoid-s5929" xml:space="preserve">ad num. </s>
            <s xml:id="echoid-s5930" xml:space="preserve">13, Saturni comes: </s>
            <s xml:id="echoid-s5931" xml:space="preserve">& </s>
            <s xml:id="echoid-s5932" xml:space="preserve">27 Mart. </s>
            <s xml:id="echoid-s5933" xml:space="preserve">ad num. </s>
            <s xml:id="echoid-s5934" xml:space="preserve">14, & </s>
            <s xml:id="echoid-s5935" xml:space="preserve">3
              <lb/>
            Apr. </s>
            <s xml:id="echoid-s5936" xml:space="preserve">ad num. </s>
            <s xml:id="echoid-s5937" xml:space="preserve">5, atque ita deinceps iis orbitæ locis quæ ob-
              <lb/>
            ſervatis primi anni exactè ſatis conveniunt, quanquam ali-
              <lb/>
            quid ſubinde addendum auferendumve 16 dierum periodo
              <lb/>
            exiſtimaverim. </s>
            <s xml:id="echoid-s5938" xml:space="preserve">Cum autem ſcirem etiam orbitæ terreſtris,
              <lb/>
            qua nos circa Solem ferimur, ipſiuſque Saturni motus ratio-
              <lb/>
            nem habendam eſſe, ſi accuratè comitis periodum definire
              <lb/>
            vellem, proinde ſequenti methodo eam deinceps inveſtigavi.</s>
            <s xml:id="echoid-s5939" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5940" xml:space="preserve">Bina tempora quæſivi quibus in apogæo vel perigæo co-
              <lb/>
              <note position="right" xlink:label="note-0279-02" xlink:href="note-0279-02a" xml:space="preserve">Eadem peri@-
                <lb/>
              dus accura-
                <lb/>
              tius ſupputa-
                <lb/>
              ta.</note>
            mes verſatus eſſet; </s>
            <s xml:id="echoid-s5941" xml:space="preserve">quorum alterum inveni 14 Martii, anno
              <lb/>
            1659, veſperi circa horam octavam. </s>
            <s xml:id="echoid-s5942" xml:space="preserve">Quia enim hora noctis
              <lb/>
            12 tantum prætergreſſus erat locum perigæi quantum ex ob-
              <lb/>
            ſervatione illo tempore habita apparet, oportet eum circiter
              <lb/>
            octavam in perigæo ipſo fuiſſe. </s>
            <s xml:id="echoid-s5943" xml:space="preserve">Alterum ſimilem comitis ſi-
              <lb/>
            tum colligo contigiſſe die 23 Martii, anno 1656, hora iti-
              <lb/>
            dem octava poſt meridiem. </s>
            <s xml:id="echoid-s5944" xml:space="preserve">Etenim quia die 16 & </s>
            <s xml:id="echoid-s5945" xml:space="preserve">30 </s>
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