Ephemerides Astronomicae. Anni...Ad Meridianum Mediolanensem

Total Page:16

File Type:pdf, Size:1020Kb

Ephemerides Astronomicae. Anni...Ad Meridianum Mediolanensem Informazioni su questo libro Si tratta della copia digitale di un libro che per generazioni è stato conservata negli scaffali di una biblioteca prima di essere digitalizzato da Google nell’ambito del progetto volto a rendere disponibili online i libri di tutto il mondo. Ha sopravvissuto abbastanza per non essere più protetto dai diritti di copyright e diventare di pubblico dominio. Un libro di pubblico dominio è un libro che non è mai stato protetto dal copyright o i cui termini legali di copyright sono scaduti. La classificazione di un libro come di pubblico dominio può variare da paese a paese. I libri di pubblico dominio sono l’anello di congiunzione con il passato, rappresentano un patrimonio storico, culturale e di conoscenza spesso difficile da scoprire. Commenti, note e altre annotazioni a margine presenti nel volume originale compariranno in questo file, come testimonianza del lungo viaggio percorso dal libro, dall’editore originale alla biblioteca, per giungere fino a te. Linee guide per l’utilizzo Google è orgoglioso di essere il partner delle biblioteche per digitalizzare i materiali di pubblico dominio e renderli universalmente disponibili. I libri di pubblico dominio appartengono al pubblico e noi ne siamo solamente i custodi. Tuttavia questo lavoro è oneroso, pertanto, per poter continuare ad offrire questo servizio abbiamo preso alcune iniziative per impedire l’utilizzo illecito da parte di soggetti commerciali, compresa l’imposizione di restrizioni sull’invio di query automatizzate. Inoltre ti chiediamo di: + Non fare un uso commerciale di questi file Abbiamo concepito Google Ricerca Libri per l’uso da parte dei singoli utenti privati e ti chiediamo di utilizzare questi file per uso personale e non a fini commerciali. + Non inviare query automatizzate Non inviare a Google query automatizzate di alcun tipo. Se stai effettuando delle ricerche nel campo della traduzione automatica, del riconoscimento ottico dei caratteri (OCR) o in altri campi dove necessiti di utilizzare grandi quantità di testo, ti invitiamo a contattarci. Incoraggiamo l’uso dei materiali di pubblico dominio per questi scopi e potremmo esserti di aiuto. + Conserva la filigrana La "filigrana" (watermark) di Google che compare in ciascun file è essenziale per informare gli utenti su questo progetto e aiutarli a trovare materiali aggiuntivi tramite Google Ricerca Libri. Non rimuoverla. + Fanne un uso legale Indipendentemente dall’utilizzo che ne farai, ricordati che è tua responsabilità accertati di farne un uso legale. Non dare per scontato che, poiché un libro è di pubblico dominio per gli utenti degli Stati Uniti, sia di pubblico dominio anche per gli utenti di altri paesi. I criteri che stabiliscono se un libro è protetto da copyright variano da Paese a Paese e non possiamo offrire indicazioni se un determinato uso del libro è consentito. Non dare per scontato che poiché un libro compare in Google Ricerca Libri ciò significhi che può essere utilizzato in qualsiasi modo e in qualsiasi Paese del mondo. Le sanzioni per le violazioni del copyright possono essere molto severe. Informazioni su Google Ricerca Libri La missione di Google è organizzare le informazioni a livello mondiale e renderle universalmente accessibili e fruibili. Google Ricerca Libri aiuta i lettori a scoprire i libri di tutto il mondo e consente ad autori ed editori di raggiungere un pubblico più ampio. Puoi effettuare una ricerca sul Web nell’intero testo di questo libro da http://books.google.com 1 EPHEMERIDES ASTRONOMICAJË Anni 1794 AD MERIDIANUM MEDIOLANENSEM SUPPUTATAE AB ANGELO DE CESARIS HOLLUME ACCEDIT APPENDIX ROMAN Cum observationibus & Opusculis UNIVEFSITE ICA R. MEDIOLANI MDCCXCIII . vvamen APUD JOSEPH GALEATIUM REGIUM TYPOGRAPHUM Superiorum permiſu . IMA . 16676 ܐܶ ܕ . ܢ , . ! ܀ ܕ f ܀ ECLIPSES ANNI 1794 . 31 Januarii Eclipſis Solis Mediolani confpicua . Initium ir ss ' Manic Finis 1 ' A Meridie Quantitas digit , t , minur . 24 in limbo bureali Solis . Primus contactus fiet in limbo Solis occiden tali & boreali in puncto diſtante 40 ° a linea verticali ducta per centrum Solis . 14 Februarii Eclipfis Lunz Mediclani confpicua . Initium Immerfionis 8 ' 34 Immerſio tota 9 49 Medium eclipfis 10 42 ) Veſpere Inicium Emerſionis II 35 Emerfio tota IZ 41 Quantitas eclipſis digit , 2 I min . 1-2 fere centralis . 5 Martii Eclipfis Solis Mediolani inconſpicua , con fpicua in regionibus Auſtralibus ad occidentem . Conjunctio Solis & Luna 10 ' 31 ' Latitudo Luna Auſtralis 1 ° 21 ' 26 Julii Eclipſis Solis , item uc ſuperior Mediolani inconſpicua . Conjunctio 109 40 ' Latitudo Lunæ Auſtralis 1 ° 15 ' . 11 Auguſti Eclipſis Lunæ Mediolani inconſpicua , Luna jam in horizonte deliteſcente . Initium . Immerfionis 6 " 13 Immerſio tota 7. , 10 Medium 8 Mane . Initium Emerſionis 8 50 Emerſio tota . 9 48 Quantitas Eclipſis dig . 20 min . 33 . 25 Auguſti Eclipfis Solis Mediolani inconſpicua . Conjunctio rho . Veſpere , Latitudo Lunæ bo Tealis 1 ° 20 ' . கோ பயை HABENTUR IN APPENDICE . 1 De menfione baſis habita ' anno 1788 Commentarius Franciſci Reggio pag . 3 Obſervationes Aftronomicæ habitæ annis 1792 1793 a Franciſco Reggio : fcilicet Mercurius prope ' maximam digreſſionem Orientalem menſe augufto 1792 21 Uranus in oppofitione Soli anno 1793 23 Sol in folftitio æftivo anno 1793 31 Eclipfes Solis & Jovis obſervatæ annis 1791 1792 1793 a 1 Barnaba Oriani 32 De emendatione elementorum orbitæ Urani ex Barnaba Oriani 33 Tabula parallaxis annuæ Urani ex codein 59 Obſervationes in Panormitana Specula in ftitutæ a Clar . Joſepho Piazzi : ſcilicet Determinatio obliquitatis eclipticæ ex ob fervatis folftitiis anni 1791 65 Elementa orbitæ Coinetz Panormi anno 1793 obſervati 67 Obſervatæ longitudines & latitudines Mere curii coinparatæ 68 Oppoſitiones Urani cam Sole annis 1790 1791 1792 obſervatæ a Barnaba Oriani pag . 69 Occultationes poft difcum Lunæ y Tauri , & y Libræ anno 1793 obſervata a Cajetano Allodio 74 De Phænomeno meteorologico & c . ab Angelo de Cefaris 76 Obſervationes meteorologicæ anni 1791 habitæ a Franciſco Reggio 89 fassus ERRATA CORRIGE . Pag . lin . cXVI Antili Pneum . Antliæ Pneum . CXVII } S 14 lineas 9 lineas 9 æquat 12 hexapeda 10 hexapedis 13 8 fiti fitæ IS 4 leniter , leniter 17 18 tabelkis , patebit tabellis patebit So gimo isimo wo FESTA MOBILIA . Septuageſima 16 Februarii Dies Cinerum 5 Martii Pascha Resurrectionis 20 Aprilis Rogationes Ritu Romano 26 , 27 , 28 Maji Ascenſio Domini 29 Rogationes Ritu Ambroſiano . 34 Pentecostes 8 Dominica SS . Trinitatis Junius 15 Solemnitas Corporis Chriſti 19 Adventus Ritu Ambroſiano 16 Novembris Adventus Ritu Romano 30 Gyçlorum Numeri . Numerus Aureus 9 | Indi & tio Romana 12 . Cyclus Solaris . Í I Lirera Dominicalis e Epacta . 28 Litera Martyrologii M Quatuor Anni Tempora . Vere . 12 14 15 Martii Æltate . II 13 14 Junii Autumno 17 19 20 Septembris Hyeme 17 19 20 Decembris Obliquitas Eclipticæ juxta novillimas tabulas . 1 Januarii 23 ° 27 ' 48 ' ' , 3 1 Aprilis 23 27 48 , 8 1 Julii 23 27 49 3 I O & tobris 23 27 49 , 8 JANUARIUS 1794 Dies Dies Phenomena & Obſervationes Pbenomena Obſervationes 1 Solis . Lunde Sol in parallelo I'Novilunium 12h 17 ' Sly Leporis culmin . Ioh 29 4 Perigea 916 Corvi . culmin . 16:57 ' S'ad & Aquarii gh 54 ' & 19h 107 Hydræ 9 culmin . 17h 38 ' 8 Primus Quadrans $ 314 niin nodo defcendente Saturni . 9 ad & Ceti 9h 11 13. Corvi culmin 161 16 ' Imin . 129 18 ) dift . gh 24 uad , Taurid . 4 ' 16 € Leporis culinin . Em . 13 18. ) die 1718 Leporis culmini . 9k 431 ad 28 Tauri 14h 3 ... Tauri 18h 55 ' 19 In figno Aquarii 6h 30'15 Plenilunium 16.9 2418 Ceti cnlmin . 4h 1418 ad « & Leonis 4h53 ' & 18h 6 13 Scorpii culmin . 19h 2219 ad x & c Leonis roh 37 & 19h 7 290 Leporis culmin . gh 341 Apogea . 13 Canis culmin . 9h 23 ' Imm . rah 56 31 Eclipfis Solis Mediolani confpicua sad , Virgin . ( m . 19 ) aift . 4 ' Vide Supra - Ultimus Quadrans 21h 22 23ad7 , n , & Libræ Tho ' , 11h 13 ' , 16h 51 ' 30 Novilunium 23 h 57 e 1 Planeta in parallelis fixaruin , Uranus « Leonis , a Ophiuci , a Cancri , s Aquile , Saturnus Tauri , Lconis , & . Virginis , Cancri , a Leonis . $ Phenomena Obſervationes Jupiter 16 Eridani ; & , Leporis , e Navis , y Planetarum . Sagittarii . 15 Mars 3 Eridani , 9 , i Orionis , B Aquarii , x Virginis *, Antinoi , Erišani , i Ophiuci , a 6 Mercurius in elongatione maxima Hydræ , 3 Librze , B Orionis , mane . $ , & Eridani , s Ophiuci , 8 Mars ad Leonis diff . lat . 13 Venus a Corvi , a Canis , u Ceti , 10 Saturnus ftat , y Sagittarii , Leporis , 8 Corvi , 13 Venus in nodo defcendente . 8 Scorpii , 9 Hydrze , 14 Mars in quadrante a Sole . Mercurius 54 Eridani , n , Capri ; 17 Mercurius in nodo defcendente . B , 8 Leporis , Corvi , 8 Cra 22 Mars ad s Virginis diff . lat . 521 teris , 8 Scorpii , ? Hydræ , s 28 Saturnus in quadrante a Sole . Corvi ; & , Leporis , Navis . A JANUARIUS 1794 . hebdom Dies Il menfis Æquatio , Diffe Longitudo Afcenfio Dies į Afcenfio Declinatio . addcnda rentia Solis Pecta Solis tempori Solis auſtralis vero ut habeatur mediuin M. S. S. S. G. M. S. G. M. S. G. M.S. I Merc . 4 16,2 9 II 239 282 22 54 22 58 Jov . 28,1 29 4 44,3 9 12 24 22 283 296 22 3 Ven . 27,8 53 $ 12,1 27,4 9 13 25. 34 284 35 12 22 47 8 4 Sat. 9 14 26 46 285 41 12 22 $ 39,5 6,4 26,9 40 47 5 Dom . 26,5 9.15 27 58 286 475 22 33 58 6 | Lun . 6 32,9 9 16 29 9 287 52 51 22 26 7 Mart . 26,0 42 6 58,9 25,4 22 19 o 8 Merc . 7 24,3 9 18 21 30 290 359 9 Jov . 24,8 22 10 52 749,1 9 19 32 40 291 921 22 2 17 Io Ven . 8 13,3 24,2 23,7 9 20 33 49 292 14 34 21 53 17 TI Sat. 9 21 34 8 37,0 23,1 57 293 19 38 21 43 52 12 Dom .
Recommended publications
  • FY08 Technical Papers by GSMTPO Staff
    AURA/NOAO ANNUAL REPORT FY 2008 Submitted to the National Science Foundation July 23, 2008 Revised as Complete and Submitted December 23, 2008 NGC 660, ~13 Mpc from the Earth, is a peculiar, polar ring galaxy that resulted from two galaxies colliding. It consists of a nearly edge-on disk and a strongly warped outer disk. Image Credit: T.A. Rector/University of Alaska, Anchorage NATIONAL OPTICAL ASTRONOMY OBSERVATORY NOAO ANNUAL REPORT FY 2008 Submitted to the National Science Foundation December 23, 2008 TABLE OF CONTENTS EXECUTIVE SUMMARY ............................................................................................................................. 1 1 SCIENTIFIC ACTIVITIES AND FINDINGS ..................................................................................... 2 1.1 Cerro Tololo Inter-American Observatory...................................................................................... 2 The Once and Future Supernova η Carinae...................................................................................................... 2 A Stellar Merger and a Missing White Dwarf.................................................................................................. 3 Imaging the COSMOS...................................................................................................................................... 3 The Hubble Constant from a Gravitational Lens.............................................................................................. 4 A New Dwarf Nova in the Period Gap............................................................................................................
    [Show full text]
  • Evidence for Very Extended Gaseous Layers Around O-Rich Mira Variables and M Giants B
    The Astrophysical Journal, 579:446–454, 2002 November 1 # 2002. The American Astronomical Society. All rights reserved. Printed in U.S.A. EVIDENCE FOR VERY EXTENDED GASEOUS LAYERS AROUND O-RICH MIRA VARIABLES AND M GIANTS B. Mennesson,1 G. Perrin,2 G. Chagnon,2 V. Coude du Foresto,2 S. Ridgway,3 A. Merand,2 P. Salome,2 P. Borde,2 W. Cotton,4 S. Morel,5 P. Kervella,5 W. Traub,6 and M. Lacasse6 Received 2002 March 15; accepted 2002 July 3 ABSTRACT Nine bright O-rich Mira stars and five semiregular variable cool M giants have been observed with the Infrared and Optical Telescope Array (IOTA) interferometer in both K0 (2.15 lm) and L0 (3.8 lm) broad- band filters, in most cases at very close variability phases. All of the sample Mira stars and four of the semire- gular M giants show strong increases, from ’20% to ’100%, in measured uniform-disk (UD) diameters between the K0 and L0 bands. (A selection of hotter M stars does not show such a large increase.) There is no evidence that K0 and L0 broadband visibility measurements should be dominated by strong molecular bands, and cool expanding dust shells already detected around some of these objects are also found to be poor candi- dates for producing these large apparent diameter increases. Therefore, we propose that this must be a con- tinuum or pseudocontinuum opacity effect. Such an apparent enlargement can be reproduced using a simple two-component model consisting of a warm (1500–2000 K), extended (up to ’3 stellar radii), optically thin ( ’ 0:5) layer located above the classical photosphere.
    [Show full text]
  • Explore the Universe Observing Certificate Second Edition
    RASC Observing Committee Explore the Universe Observing Certificate Second Edition Explore the Universe Observing Certificate Welcome to the Explore the Universe Observing Certificate Program. This program is designed to provide the observer with a well-rounded introduction to the night sky visible from North America. Using this observing program is an excellent way to gain knowledge and experience in astronomy. Experienced observers find that a planned observing session results in a more satisfying and interesting experience. This program will help introduce you to amateur astronomy and prepare you for other more challenging certificate programs such as the Messier and Finest NGC. The program covers the full range of astronomical objects. Here is a summary: Observing Objective Requirement Available Constellations and Bright Stars 12 24 The Moon 16 32 Solar System 5 10 Deep Sky Objects 12 24 Double Stars 10 20 Total 55 110 In each category a choice of objects is provided so that you can begin the certificate at any time of the year. In order to receive your certificate you need to observe a total of 55 of the 110 objects available. Here is a summary of some of the abbreviations used in this program Instrument V – Visual (unaided eye) B – Binocular T – Telescope V/B - Visual/Binocular B/T - Binocular/Telescope Season Season when the object can be best seen in the evening sky between dusk. and midnight. Objects may also be seen in other seasons. Description Brief description of the target object, its common name and other details. Cons Constellation where object can be found (if applicable) BOG Ref Refers to corresponding references in the RASC’s The Beginner’s Observing Guide highlighting this object.
    [Show full text]
  • Naming the Extrasolar Planets
    Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named.
    [Show full text]
  • Binocular Double Star Logbook
    Astronomical League Binocular Double Star Club Logbook 1 Table of Contents Alpha Cassiopeiae 3 14 Canis Minoris Sh 251 (Oph) Psi 1 Piscium* F Hydrae Psi 1 & 2 Draconis* 37 Ceti Iota Cancri* 10 Σ2273 (Dra) Phi Cassiopeiae 27 Hydrae 40 & 41 Draconis* 93 (Rho) & 94 Piscium Tau 1 Hydrae 67 Ophiuchi 17 Chi Ceti 35 & 36 (Zeta) Leonis 39 Draconis 56 Andromedae 4 42 Leonis Minoris Epsilon 1 & 2 Lyrae* (U) 14 Arietis Σ1474 (Hya) Zeta 1 & 2 Lyrae* 59 Andromedae Alpha Ursae Majoris 11 Beta Lyrae* 15 Trianguli Delta Leonis Delta 1 & 2 Lyrae 33 Arietis 83 Leonis Theta Serpentis* 18 19 Tauri Tau Leonis 15 Aquilae 21 & 22 Tauri 5 93 Leonis OΣΣ178 (Aql) Eta Tauri 65 Ursae Majoris 28 Aquilae Phi Tauri 67 Ursae Majoris 12 6 (Alpha) & 8 Vul 62 Tauri 12 Comae Berenices Beta Cygni* Kappa 1 & 2 Tauri 17 Comae Berenices Epsilon Sagittae 19 Theta 1 & 2 Tauri 5 (Kappa) & 6 Draconis 54 Sagittarii 57 Persei 6 32 Camelopardalis* 16 Cygni 88 Tauri Σ1740 (Vir) 57 Aquilae Sigma 1 & 2 Tauri 79 (Zeta) & 80 Ursae Maj* 13 15 Sagittae Tau Tauri 70 Virginis Theta Sagittae 62 Eridani Iota Bootis* O1 (30 & 31) Cyg* 20 Beta Camelopardalis Σ1850 (Boo) 29 Cygni 11 & 12 Camelopardalis 7 Alpha Librae* Alpha 1 & 2 Capricorni* Delta Orionis* Delta Bootis* Beta 1 & 2 Capricorni* 42 & 45 Orionis Mu 1 & 2 Bootis* 14 75 Draconis Theta 2 Orionis* Omega 1 & 2 Scorpii Rho Capricorni Gamma Leporis* Kappa Herculis Omicron Capricorni 21 35 Camelopardalis ?? Nu Scorpii S 752 (Delphinus) 5 Lyncis 8 Nu 1 & 2 Coronae Borealis 48 Cygni Nu Geminorum Rho Ophiuchi 61 Cygni* 20 Geminorum 16 & 17 Draconis* 15 5 (Gamma) & 6 Equulei Zeta Geminorum 36 & 37 Herculis 79 Cygni h 3945 (CMa) Mu 1 & 2 Scorpii Mu Cygni 22 19 Lyncis* Zeta 1 & 2 Scorpii Epsilon Pegasi* Eta Canis Majoris 9 Σ133 (Her) Pi 1 & 2 Pegasi Δ 47 (CMa) 36 Ophiuchi* 33 Pegasi 64 & 65 Geminorum Nu 1 & 2 Draconis* 16 35 Pegasi Knt 4 (Pup) 53 Ophiuchi Delta Cephei* (U) The 28 stars with asterisks are also required for the regular AL Double Star Club.
    [Show full text]
  • Astronomy with Small Telescopes
    Astronomy With Small Telescopes Bohdan Paczy´nski Princeton University Observatory, Princeton, NJ 08544 [email protected] ABSTRACT The All Sky Automated Survey (ASAS) is monitoring all sky to about 14 mag with a cadence of about 1 day; it has discovered about 105 variable stars, most of them new. The instrument used for the survey had aperture of 7 cm. A search for planetary transits has lead to the discovery of about a dozen confirmed planets, so called ’hot Jupiters’, providing the information of planetary masses and radii. Most discoveries were done with telescopes with aperture of 10 cm. We propose a search for optical transients covering all sky with a cadence of 10 - 30 minutes and the limit of 12 - 14 mag, with an instant verification of all candidate events. The search will be made with a large number of 10 cm instruments, and the verification will be done with 30 cm instruments. We also propose a system to be located at the L1 point of the Earth - Sun system to detect ’killer asteroids’. With a limiting magnitude of about 18 mag it could detect 10 m boulders several hours prior to their impact, provide warning against Tunguska-like events, as well as to provide news about spectacular but harmless more modest impacts. Subject headings: techniques: photometric — surveys — celestial mechanics — mete- oroids — stars: variable — gamma rays: bursts arXiv:astro-ph/0609161v3 7 Nov 2006 1. Introduction The goal of this paper is to point out that there are many tasks for which small and even very small telescopes are not only useful, but even indispensable.
    [Show full text]
  • GTO Keypad Manual, V5.001
    ASTRO-PHYSICS GTO KEYPAD Version v5.xxx Please read the manual even if you are familiar with previous keypad versions Flash RAM Updates Keypad Java updates can be accomplished through the Internet. Check our web site www.astro-physics.com/software-updates/ November 11, 2020 ASTRO-PHYSICS KEYPAD MANUAL FOR MACH2GTO Version 5.xxx November 11, 2020 ABOUT THIS MANUAL 4 REQUIREMENTS 5 What Mount Control Box Do I Need? 5 Can I Upgrade My Present Keypad? 5 GTO KEYPAD 6 Layout and Buttons of the Keypad 6 Vacuum Fluorescent Display 6 N-S-E-W Directional Buttons 6 STOP Button 6 <PREV and NEXT> Buttons 7 Number Buttons 7 GOTO Button 7 ± Button 7 MENU / ESC Button 7 RECAL and NEXT> Buttons Pressed Simultaneously 7 ENT Button 7 Retractable Hanger 7 Keypad Protector 8 Keypad Care and Warranty 8 Warranty 8 Keypad Battery for 512K Memory Boards 8 Cleaning Red Keypad Display 8 Temperature Ratings 8 Environmental Recommendation 8 GETTING STARTED – DO THIS AT HOME, IF POSSIBLE 9 Set Up your Mount and Cable Connections 9 Gather Basic Information 9 Enter Your Location, Time and Date 9 Set Up Your Mount in the Field 10 Polar Alignment 10 Mach2GTO Daytime Alignment Routine 10 KEYPAD START UP SEQUENCE FOR NEW SETUPS OR SETUP IN NEW LOCATION 11 Assemble Your Mount 11 Startup Sequence 11 Location 11 Select Existing Location 11 Set Up New Location 11 Date and Time 12 Additional Information 12 KEYPAD START UP SEQUENCE FOR MOUNTS USED AT THE SAME LOCATION WITHOUT A COMPUTER 13 KEYPAD START UP SEQUENCE FOR COMPUTER CONTROLLED MOUNTS 14 1 OBJECTS MENU – HAVE SOME FUN!
    [Show full text]
  • A Case for an Atmosphere on Super-Earth 55 Cancri E
    The Astronomical Journal, 154:232 (8pp), 2017 December https://doi.org/10.3847/1538-3881/aa9278 © 2017. The American Astronomical Society. All rights reserved. A Case for an Atmosphere on Super-Earth 55 Cancri e Isabel Angelo1,2 and Renyu Hu1,3 1 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA; [email protected] 2 Department of Astronomy, University of California, Campbell Hall, #501, Berkeley CA, 94720, USA 3 Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA Received 2017 August 2; revised 2017 October 6; accepted 2017 October 8; published 2017 November 16 Abstract One of the primary questions when characterizing Earth-sized and super-Earth-sized exoplanets is whether they have a substantial atmosphere like Earth and Venus or a bare-rock surface like Mercury. Phase curves of the planets in thermal emission provide clues to this question, because a substantial atmosphere would transport heat more efficiently than a bare-rock surface. Analyzing phase-curve photometric data around secondary eclipses has previously been used to study energy transport in the atmospheres of hot Jupiters. Here we use phase curve, Spitzer time-series photometry to study the thermal emission properties of the super-Earth exoplanet 55 Cancri e. We utilize a semianalytical framework to fit a physical model to the infrared photometric data at 4.5 μm. The model uses parameters of planetary properties including Bond albedo, heat redistribution efficiency (i.e., ratio between radiative timescale and advective timescale of the atmosphere), and the atmospheric greenhouse factor.
    [Show full text]
  • FY13 High-Level Deliverables
    National Optical Astronomy Observatory Fiscal Year Annual Report for FY 2013 (1 October 2012 – 30 September 2013) Submitted to the National Science Foundation Pursuant to Cooperative Support Agreement No. AST-0950945 13 December 2013 Revised 18 September 2014 Contents NOAO MISSION PROFILE .................................................................................................... 1 1 EXECUTIVE SUMMARY ................................................................................................ 2 2 NOAO ACCOMPLISHMENTS ....................................................................................... 4 2.1 Achievements ..................................................................................................... 4 2.2 Status of Vision and Goals ................................................................................. 5 2.2.1 Status of FY13 High-Level Deliverables ............................................ 5 2.2.2 FY13 Planned vs. Actual Spending and Revenues .............................. 8 2.3 Challenges and Their Impacts ............................................................................ 9 3 SCIENTIFIC ACTIVITIES AND FINDINGS .............................................................. 11 3.1 Cerro Tololo Inter-American Observatory ....................................................... 11 3.2 Kitt Peak National Observatory ....................................................................... 14 3.3 Gemini Observatory ........................................................................................
    [Show full text]
  • OGLE 2004-BLG-254: a K3 III Galactic Bulge Giant Spatially Resolved by A
    Astronomy & Astrophysics manuscript no. 4414arti c ESO 2018 January 9, 2018 OGLE 2004–BLG–254: a K3 III Galactic Bulge Giant spatially resolved by a single microlens⋆ A. Cassan1,2,3, J.-P. Beaulieu1,3, P. Fouqu´e1,4, S. Brillant1,5, M. Dominik1,6, J. Greenhill1,7, D. Heyrovsk´y8, K. Horne1,6, U.G. Jørgensen1,9, D. Kubas1,5, H.C. Stempels6, C. Vinter1,9, M.D. Albrow1,12, D. Bennett1,13, J.A.R. Caldwell1,14,15, J.J. Calitz1,16, K. Cook1,17, C. Coutures1,18, D. Dominis1,19, J. Donatowicz1,20, K. Hill1,7, M. Hoffman1,16, S. Kane1,21, J.-B. Marquette1,3, R. Martin1,22, P. Meintjes1,16, J. Menzies1,23, V.R. Miller12, K.R. Pollard1,12, K.C. Sahu1,14, J. Wambsganss1,2, A. Williams1,22, A. Udalski10,11, M.K. Szyma´nski10,11, M. Kubiak10,11, G. Pietrzy´nski10,11,24, I. Soszy´nski10,11,24, K. Zebru´n˙ 10,11, O. Szewczyk10,11, and Ł. Wyrzykowski10,11,25 (Affiliations can be found after the references) Received ¡date¿ / Accepted ¡date¿ ABSTRACT Aims. We present an analysis of OGLE 2004–BLG–254, a high-magnification (A 60) and relatively short duration (tE 13.2 days) microlensing event in which the source star, a Bulge K-giant, has been spatially resolved◦ ≃ by a point-like lens. We seek to determine≃ the lens and source distance, and provide a measurement of the linear limb-darkening coefficients of the source star in the I and R bands. We discuss the derived values of the latter and compare them to the classical theoretical laws, and furthermore examine the cases of already published microlensed GK-giants limb-darkening measurements.
    [Show full text]
  • Cycle 12 Abstract Catalog
    Cycle 12 Abstract Catalog Generated April 04, 2003 ================================================================================ Proposal Category: GO Scientific Category: ISM AND CIRCUMSTELLAR MATTER ID: 9718 Title: SMC Extinction Curve Towards a Quiescent Molecular Cloud PI: Francois Boulanger PI Institution: Institut d'Astrophysique Spatiale The lack of 2175 A bump in the SMC extinction curve is interpreted as an absence of small carbon grains. ISO Mid-IR observations support this interpretation by showing that PAH features are absent in the spectra of SMC and LMC massive star forming regions. However, the only ISO observation of an SMC quiescent molecular cloud shows all PAH features, indicating a PAH abundance relative to large dust grains similar to that of Milky Way clouds. We identified a reddened B2III star associated with this cloud. We propose to observe it with STIS. This observation will provide the first measure of the extinction properties of SMC dust away from star forming regions. It will allow us to disentangle the effects of metallicity and massive stars on the SMC extinction curve and dust composition and to assess the relevance of the SMC bump-free extinction curve to low metallicity and/or starburst galaxies in general. ================================================================================ Proposal Category: GO Scientific Category: STELLAR POPULATIONS ID: 9719 Title: Search For Metallicity Spreads in M31 Globular Clusters PI: Terry Bridges PI Institution: Anglo-Australian Observatory Our recent deep HST photometry of the M31 halo globular cluster (GC) Mayall~II, also called G1, has revealed a red-giant branch with a clear spread that we attribute to an intrinsic metallicity dispersion of at least 0.4 dex in [Fe/H].
    [Show full text]
  • 25.DORN Groundbasedtelescopes Part1.Pdf
    A primer on Distances in the Universe Image: Splung.com physics 5/19/11 Reinhold Dorn ESI 2011 2 5/19/11 Reinhold Dorn ESI 2011 3 Stellar magnitude – a measure of the brightness of stars Astronomers talk about two different kinds of magnitudes: apparent and absolute. The apparent magnitude, m, of a star expresses how bright it appears, as seen from the earth, ranked on the magnitude scale. Two factors affect the apparent magnitude: 1. How luminous the star is 2. How far away the star is from the earth. Absolute magnitude, M, expresses the brightness of a star as it would be ranked on the magnitude scale if it was placed 10 pc (32.6 ly) from the earth. Since all stars would be placed at the same distance, absolute magnitudes show differences in actual luminosities. Some astronomical objects and their apparent magnitudes from Earth 5/19/11 Reinhold Dorn ESI 2011 4 The Hertzsprung-Russell diagram Hertzsprung-Russell diagram by Richard Powell Image: Richard Powell The H-R Diagram is an extremely useful. It shows the changes that take place as a star evolves. Most stars are on the Main Sequence because that is where stars spend most of their lives, burning hydrogen to helium. As stars live out their lives, changes in the structure of the star are reflected in changes in stars temperatures, sizes and luminosities, which cause them to move in tracks on the H-R Diagram. 5/19/11 Reinhold Dorn ESI 2011 5 It is important to understand a basic fact how planets and stars orbit: The Barycenter - the common center of mass Two bodies with an extreme Two bodies with similar mass orbiting difference in mass orbiting around a around a common barycenter with common barycenter (i.e.
    [Show full text]