{ "id": "ea3e320530058036f8de94ec063985b53ab88be9", "text": "1. A Letter from the learned Mr John Flamsteed Astron. Reg. concerning the Eclipses of Jupiters Satellit's for the year following 1685. with a Catalogue of them, and informations concerning its use.\n\nEclipses Comitum Jovialium ubique Terrarum Anno labente 1684. visibiles, Actis vestris Philosophicis Mensis Decembri Anni anteacti 1683. Numero 154. edidi, è Novis motuum Tabulis supputatas, quas è propriis Observationibus cum antecedentibus Clariss. Hodierne, Cassini, Rookii, & Townleii collatis deduxeram. Observatis exinde nonnullis è pravis cujuscunque Satellitis Eclipsibus, Tabulas raro duo temporis minuta horaria iu phasibus Primi aut Quartii à Calculo discrepare comperti; in defectibus autem Tertii & Secundi Satellitis, errores 5 vel 7 minutorum horæ prodiere, & aliquando sed rarius duplo maiores, unde innotuit, illorum Motus satis esse æquabiles, horum vero inæqualitatibus exiguis implicatos, quibus investigandis longiore opus est experientia. Comperto hoc Tabularum cum calis consentu, novam exinde Eclipsium catalogum supputavi, in annum 1685, eumque vobis maturè edendum transmitto, illorum in gratiam, qui vel Satellitum Motibus accuratius restituendis mecum invigilant, vel disfitorum locorum distantias Meridianas coelitus factis observationibus deducere cupiunt; cui negotio commodiora dari posse phænomena vix aliquis credet, si vel debite instructus eclipsis alicujus observationem tentet, vel observandi facilitatem, æquabilitatem cum velocitate motuum Comitum Jovialium, aut eclipsium frequentiam secum ferrio perpendet. Harum, quæ in Nostro Horizonte visibles sunt, Asterismo [*] in Catalogo notantur; Reliquæ nobis inconspicuae iis in locis observandæ venient, ubi\nubi tum temporis, sole infra Horizontem vertante, Jupiter supra eum existit; at quibus limitibus ea in orbe nostro loca clauduntur, facile ope Ephemeridum vulgarium & Globi terrestris cognoscatur, Methodo sequenti.\n\nAd datum tempus cujuscunque Immersionis aut Emer-\nsionis, promatur ab Ephemeride locus verus Solis, cum loco Jovis, & latitudine Geocentrica; inde utriusque Ascen-\ntio recta deducenda est, cum declinatione ab Equatore;\nvel ope Tabularum Primi Mobilis, vel, si desint, ipsius\nGlobi.\n\nSistatur tunc Londinum (cujus ferè ad Meridianum\ntempora Eclipsium supputantur) sub Meridiano Globi\næneo, & notato Æquatoris gradu simul ipsum transe-\nunte, afferatur inde (addito prius si opus est circulo)\ntempus eclipsis post Meridiem in gradus eorumque par-\ntes conversum, Arcus reliquus Longitudinem ostendit\nlocorum omnium, quibus illa contigit satellitis Eclipse-\nsis, Sole Meridianum transeunte; quam propterea Me-\nridianam Eclipse Longitudinem appello.\n\nVolatatur hæc Meridiana Longitudo ad Meridianum\nGlobi, & elevato supra horizontem ejus Polo Soli propiore, quantum est ipsius declinatio, detentoque in ea\npositione immoto Globo, si sit 7° in consequentia Solis,\nducatur linea ipsum supra per finitorem (vulgo) ori-\nentalem, isthæc loca ea omnia designabit quibus tum\ntemporis Sol occidit: Quod si 7° fit in antecedentia\nSolis, scribatur linea per horizontem occidentalem, lo-\nca transcurret quibus Sol tunc oritur.\n\nExistente 7° in consequentia Solis, Meridianæ Longi-\ntudini addatur differentia Ascensionum rectarum Solis\n& Jovis, Summae huic respondens Æquatoris Gradus si-\nstatur sub Meridiano Globi, & exerto supra finitorem\nPolo 7° i proximo, quantum ille ab Æquatore distat, ma-\nnente immoto Globo, scribatur linea ipsum supra per\nhorizontem ortivam; spatium hanc inter & lineam oc-\ncatuum Solis anteductam interceptum, loca ea omnia\ncomprehendet, quibus Eclipseis observabilis est ab occa-\nSolis ad occasum Jovis.\n\nQuod si \\( \\theta \\) in antecedentia Solis sit, à dicta Meridiana\nLongitudine auferatur differentia Ascensionum rectarum\n\\( \\gamma \\)'s & \\( \\gamma \\)'s, siliturque sub Meridiano Globi, Æquatoris\ngradus Arcui residuo respondens; tunc exerto ab hori-\nzonte Polo \\( \\gamma \\)'i proximo, quantum ipse ab Æquatore de-\nclinat, & fixo in ea positione Globo, ducatur linea ipsum\nsupra per finitorem occidentalem, spatium hac & linea\nexortuum Solis anteducta inclusum, loca ea omnia com-\nplectitur, quibus eclipseis videnda erit ab exortu \\( \\gamma \\)'i ad\nexortum Solis.\n\nPlura non addo quoniam hæc Cælorum peritos mo-\nnuisse sufficient, videant alii quæ de hisce phænomenis\nfute scripsi sermone Anglicano in Præfatione ad Cata-\nlogum Anni labentis Actis vestris Phil. editum Numero\n154. Tu interea vale. Grenovici scripsi Octobris 28.\n1684.\nCatalogus Eclipticum Comitum Jovialium etque Terrarum Anno Intequenti 1635. Vitriolum, tempora ingressu illorum in Jovis Umbra, aut ab ea Eclensionum, seu Meridiano Grenovisano apparentia, exhibens, e Novis motuum Tabulis supputata; à Jo. Flamsteedio Math. Reg. & R. S. S.\n\n| Jan. | S P. | Febr. | Martu | Aprilis |\n|------|------|-------|-------|---------|\n| d | h | d | h | d |\n| 1 | 21 | 29 | 1 | 1 |\n| 2 | 10 | 13 | 3 | 2 |\n| 3 | 15 | 57 | 1* | 4 |\n| 4 | 12 | 58 | *c | 3 |\n| 5 | 19 | 51 | 2 | 5 |\n| 6 | 6 | 6 | 49 | 6 |\n| 7 | 10 | 24 | 1 | 7 |\n| 8 | 7 | 5 | 543 | 8 |\n| 9 | 4 | 52 | 1 | 9 |\n| 10 | 9 | 39 | 2 | 10 |\n| 11 | 23 | 20 | 1 | 11 |\n| 12 | 14 | 8 | * | 12 |\n| 13 | 16 | 53 | 3*c | 13 |\n| 14 | 17 | 48 | 1*i | 14 |\n| 15 | 22 | 55 | 2*i | 15 |\n| 16 | 12 | 15 | 1*i | 16 |\n| 17 | 14 | 6 | 43 | 17 |\n| 18 | 12 | 11 | 2*i | 18 |\n| 19 | 16 | 11 | 1*i | 19 |\n| 20 | 18 | 3 | *i | 20 |\n| 21 | 20 | 47 | 3*e | 21 |\n| 22 | 19 | 39 | 1*i | 22 |\n| 23 | 18 | 1 | 2*i | 23 |\n| 24 | 19 | 14 | 7*i | 24 |\n| 25 | 21 | 8 | 35*i | 25 |\n| 26 | 23 | 14 | 44*i | 26 |\n| 27 | 23 | 3 | 3*i | 27 |\n| 28 | 25 | 1 | 59*i | 28 |\n| 29 | 27 | 10 | 2*i | 29 |\n| 30 | 17 | 17 | 2*i | 30 |\n| 31 | 4 | 55 | i | |\n| 1 | 1 | 57 | 3 | |\n| 2 | 4 | 4 | 3 | |\n| 3 | 23 | 24 | 1*i | |\n\n[Mat]\n| Maii | d b' | Maii | d b' | Maii | d b' | Maii | d b' |\n|------|------|------|------|------|------|------|------|\n| 1 | 5:48 | 2 | c | 1 | 10:13| 1* | c |\n| 2 | 8:8 | 1* | e | 2 | 14:44| i | 3 |\n| 4 | 2:37 | 1 | c | 2 | 0:21 | 3 | c |\n| | 8 | 29 | 3* | | 5 | 26 | 2 |\n| | | | | | | | |\n| 19 | 6 | 2 | c | 3 | 4:42 | 1 | e |\n| 5 | 21 | 6 | 1 | 4 | 23:10| 1 | c |\n| 7 | 15 | 34 | 1 | 5 | 18:44| 2 | c |\n| 8 | 8 | 24 | 2* | 6 | 17:38| 1 | c |\n| 9 | 10 | 3 | 1* | 8 | 12:7 | 1* | c |\n| 11 | 4 | 31 | 1 | 9 | 1 | 42 | i |\n| 12 | 2 | 8 | 3* | 4 | 19 | 3 | c |\n| 21 | 4 | 1 | 2 | 8 | 1 | 2 | e |\n| 12 | 23 | 0 | 1 | 10 | 6 | 35 | 1 |\n| 14 | 17 | 29 | 1 | 12 | 1 | 4 | i |\n| 15 | 10 | 59 | 2* | 21 | 1 | 8 | 2 |\n| 16 | 11 | 57 | 1* | 13 | 19 | 32 | 1 |\n| 18 | 6 | 26 | 1 | 15 | 14 | 0 | 1 |\n| 16 | 26 | 3 | c | 16 | 5 | 39 | 3* |\n| 19 | 0 | 17 | 2 | 8 | 17 | 3* | c |\n| 20 | 0 | 54 | 1 | 10 | 36 | 2* | e |\n| 21 | 19 | 23 | 1 | 17 | 8 | 29 | 1 |\n| 22 | 13 | 34 | 2* | 19 | 2 | 57 | 2 |\n| 23 | 13 | 51 | 1* | 23 | 53 | 2 | c |\n| 25 | 8 | 19 | 1* | 20 | 21:26| 1 | c |\n| 17 | 46 | 3 | i | 22 | 15 | 54 | 1 |\n| 20 | 23 | c | | 23 | 9 | 38 | *i |\n| 26 | 2 | 52 | 2 | 12 | 14 | 3 | e |\n| 27 | 2 | 48 | 1 | 13 | 10 | 2 | e |\n| 28 | 21 | 16 | 1 | 24 | 10 | 23 | 1* |\n| 29 | 16 | 9 | 2 | 26 | 4 | 51 | 1 |\n| 30 | 15 | 45 | 1 | 27 | 2 | 28 | 2 |\n| | | | | | | | |\n| 1 | 15 | 28 | 2 | 2 | 8 | 55 | 1* |\n| 4 | 3 | 24 | 1 | 5 | 4 | 47 | 2 |\n| 12 | 8 | 3 | c | 21 | 53 | 1 | c |\n| 7 | 16 | 22 | 1 | 8 | 18 | 5 | 2 |\n| 9 | 10 | 51 | 1 | 11 | 5 | 21 | 1 |\n| 12 | 7 | 24 | 2* | 16 | 09 | 3 | e |\n| 23 | 50 | 1 | c | 14 | 18 | 19 | 1 |\n| 15 | 20 | 43 | 2 | 16 | 12 | 48 | 1 |\n| 18 | 07 | 17 | 1* | 19 | 10 | 2 | 2 |\n| 20 | 1 | 47 | 1 | 21 | 20 | 16 | 1 |\n| 22 | 23 | 21 | 2 | 23 | 14 | 45 | 1 |\n| 25 | 09 | 14 | 1 | 26 | 12 | 40 | 2 |\n| 27 | 0 | 11 | 3 | 3 | 43 | 1 | e |\n| 28 | 22 | 13 | 1 | 30 | 1 | 59 | 2 |\n| 16 | 42 | 1 | e | | | | |\n\nSep-\n| Septemb. | Novembr. | Decembris. | Quartus Umbram Jovis hoc Anno non ingreditur propter Orbite Latitudinem Jovialis Umbrae semidiametro majorem. Accedet tamen ad Longitudinem Eclipsium temporibus infra notatis. |\n|----------|----------|------------|--------------------------------------------------|\n| d h | d h | d h | |\n| 1 11 11 1 e | 1 22 5 12 i | 2 9 40 i | |\n| 2 15 18 2 e | 2 7 48 i | 3 22 14 2 | |\n| 3 4 12 3 e | 4 2 16 i | 4 4 8 i | |\n| 5 4 1 i | 5 12 7 2 | 5 5 11 3 | |\n| 6 4 37 2 e | 6 13 31 3 | 7 11 30 2 | |\n| 8 18 39 1 e | 7 15 12 1 | 17 3 1* | |\n| 8 13 8 i | 9 1 24 2 | 9 11 30 1 | |\n| 9 17 56 2 e | 9 40 i | 11 0 46 2 | |\n| 10 6 7 38 1 e | 11 4 08 i | 5 57 1 | |\n| 8 13 3 e | 12 14 40 2 | 12 9 5 3 | |\n| 12 2 7 1 e | 22 36 i | 13 0 25 1 | |\n| 13 7 15 2 e | 13 17 27 3 | 14 14 0 1 | |\n| 20 36 1 e | 14 17 4 i | 18 52 1* | |\n| 15 15 05 1 c | 16 3 56 2 | 19 13 20 1 | |\n| 16 20 34 2 e | 11 32 i | 18 3 16 2 | |\n| 17 9 34 1 e | 18 5 59 i | 7 47 1 | |\n| 12 15 3 e | 19 17 12 2* | 19 12 58 3 | |\n| 19 4 4 1 e | 20 0 27 i | 20 2 14 1 | |\n| 20 9 52 2 e | 21 22 3 | 21 16 32 2* | |\n| 22 32 1 e | 21:18:55 i | 20 42 i | |\n| 22 17 2 i | 23 6 28 i | 23 15 9 i | |\n| 23 23 12 2 e | 13 22 i | 25 5 47 2 | |\n| 24 11 31 1 e | 25 7 50 i | 9 37 i | |\n| 16 15 3 e | 26 19 44 2* | 26 16 52 3* | |\n| 26 06 00 1* e | 27 2 17 i | 19 28 3* | |\n| 27 12 31 2 c | 28 1 17 3 | 27 4 4 i | |\n| 28 0 29 1 e | 20 45 i | 28 19 3 2* | |\n| 29 18 58 1 e | 30 8:59 2 | 22 31 i | |\n| 15 12 i | 30 16 59 i | 30 16 59 i | |\n\nOclobre toto sub Radiis Clatet.\n\nStylo veteri utor horas a Meridie numero more Astronomico.", "source": "olmocr", "added": "2026-01-12", "created": "2026-01-12", "metadata": { "Source-File": "/home/jic823/projects/def-jic823/royalsociety/pdfs/102094.pdf", "olmocr-version": "0.3.4", "pdf-total-pages": 7, "total-input-tokens": 10700, "total-output-tokens": 5522, "total-fallback-pages": 0 }, "attributes": { "pdf_page_numbers": [ [ 0, 0, 1 ], [ 0, 1695, 2 ], [ 1695, 3546, 3 ], [ 3546, 4463, 4 ], [ 4463, 6298, 5 ], [ 6298, 9204, 6 ], [ 9204, 12256, 7 ] ], "primary_language": [ "en", "en", "la", "la", "la", "en", "la" ], "is_rotation_valid": [ true, true, true, true, true, true, true ], "rotation_correction": [ 0, 0, 0, 0, 0, 0, 0 ], "is_table": [ false, false, false, false, true, true, true ], "is_diagram": [ false, false, false, false, false, false, false ] }, "jstor_metadata": { "identifier": "jstor-102094", "title": "A Letter from the Learned Mr John Flamsteed Astron. Reg. concerning the Eclipses of Jupiters Satellit's for the Year Following 1685. with a Catalogue of Them, and Informations concerning Its Use", "authors": "John Flamsteed", "year": 1684, "volume": "14", "journal": "Philosophical Transactions (1683-1775)", "page_count": 7, "jstor_url": "https://www.jstor.org/stable/102094" } }