DOCSLIB.ORG

An Atmosphere on Ganymede from Its Occultation of SAO 186800 on 7 June 1972 Author(S): R

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
An Atmosphere on Ganymede from Its Occultation of SAO 186800 on 7 June 1972 Author(S): R An Atmosphere on Ganymede from Its Occultation of SAO 186800 on 7 June 1972 Author(s): R. W. Carlson, J. C. Bhattacharyya, B. A. Smith, T. V. Johnson, B. Hidayat, S. A. Smith, G. E. Taylor, B. O'Leary and R. T. Brinkmann Source: Science, New Series, Vol. 182, No. 4107 (Oct. 5, 1973), pp. 53-55 Published by: American Association for the Advancement of Science Stable URL: http://www.jstor.org/stable/1736235 . Accessed: 14/11/2014 12:17 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. American Association for the Advancement of Science is collaborating with JSTOR to digitize, preserve and extend access to Science. http://www.jstor.org This content downloaded from 131.215.225.130 on Fri, 14 Nov 2014 12:17:50 PM All use subject to JSTOR Terms and Conditions asteroid belt at 8 X 108 This 3. J. R. Arnold, Astrophys. J. 141, 1536, 1548 relative position of the two bodies was g/year. (1965). result is similar ,to the observational 4. E. J. Opik, Advan. Astron. Astrophys. 4, then estimated as 0.3". The adopted of 109 obtained 302 (1966). diameter for was estimate g/year by 5. G. W. Wetherill, in Physical Studies of the prediction purposes Hawkins (16) as well as that obtained Minor Planets, T. Gehrels, Ed. (NASA SP- 5550 ? 130 km (2). 267, National Aeronautics and Space Admin- Successful by Latham et al. (17) from lunar seis- istration, Washington, D.C., 1971), p. 447. observations of the oc- mic data, although the flux obtained by 6. R. E. McCrosky, Smithson. Astrophys. Obs. cultation were made by Hidayat, Carl- Spec. Rep. 252 (1967); Eos Trans. Amer. the Prairie Network (5 X 1010 g/year) Geophys. Union 53, 724 (1972). son, and Johnson at the Bosscha Ob- from all sources, including fireballs 7. D. E. Gault, Meteoritics 4, 177 (1969); J. S. servatory near Lembang, Java, and by Dohnanyi, J. Geophys. Res. 75, 3468 (1970); (18), is higher. Including uncertainties G. W. Wetherill, ibid. 72, 2429 (1967). Bhattacharyya at the Kavalur field in there may be an uncer- S. G. W. Wetherill, Science 159, 79 (1968). station of the Kodaikanal Observatory (dMe/dt), 9. I. S. Astopovich, Astron. Zh. 16, 15 (1939); tainty of an order of magnitude in our F. L. Whipple and R. F. Hughes, in Meteors, in India. B. A. Smith and S. A. Smith, T. R. Kaiser, Ed. (Pergamon, London, 1955), with a calculations; however, the resonant ex- p. 149. observing portable photometer traction mechanism we propose should 10. Y. Kozai, Astron. J. 67, 591 (1962); A. J. and 20-cm telescope from Darwin, Smith, Jr., NASA Rep. TR R-194 (1964). result in a significant meteorite flux at 11. J. G. Williams, thesis, University of Cali- Australia, were just slightly (50 km; Earth. fornia, Los Angeles (1969). see Fig. 1) south of the ,actualocculta- 12. C. J. van Houten, I. van Houten-Groeneveld, Spectrophotometric study (19) of P. Herget, T. Gehrels, Astron. Astrophys. tion zone and obtained negative results. asteroids such as (511) Davida, (814) Suppl. 2, 339 (1970). The sky was of excellent photometric 13. B. G. Marsden, Astron. J. 75, 206 (1970). Tauris, (31) Euphrosyne, (175) 14. G. W. Wetherill and J. G. Williams, J. quality with scintillation noise below Andromache, and Hecuba Geophys. Res. 73, 635 (1968). average and all functioned (108) lying 15. D. E. Gault, E. M. Shoemaker, H. J. Moore, equipment near the boundary of the Kirkwood NASA Tech. Note D-1767 (1963). properly. An attempt was also made by 16. G. S. Hawkins, Astron. J. 65, 318 (1960). Gap could permit their identification 17. G. V. Latham, M. Ewing, F. Press, G. S. D. Sinvhal at the Uttar Pradesh Ob- with known classes of meteorites. Sutton, J. Dorman, Y. Nakamura, N. Toksoz, servatory in Naini Tal, India, with D. Lammlein, F. Duennebier, in Apollo 16 Another asteroidalresonance extraction Preliminary Science Report (NASA SP-315, photoelectric equipment but the fluctu- mechanism, utilizing "secular" reson- National Aeronautics and Space Administra- ations in sky transparency were too tion, Washington, D.C., 1972), pp. 9-19. ances rather than commensurabilities, 18. R. E. McCrosky, Smithson. Astrophys, Obs. large for any events to be detected. has recently been proposed by Williams Spec. Rep. 280 (1968). The photoelectric observations of 19. C. R. Chapman, thesis, Massachusetts Institute (20) and may be of comparable im- of Technology (1972); T. B. McCord, J. B. the event from Lembang (107.6?E, Adams, T. V. Johnson, Science 168, 1445 6.8?S, 1300 m above sea were portance. (1970). level) PETER D. ZIMMERMAN* 20. J. G. Williams, Eos Trans. Amer. Geophys. made with the Bosscha twin 60-cm Union 54, 233 (1973), Paper No. G46. G. W. WETHERILL 21. We thank Dr. J. G. Williams for his con- refracting telescopes mounted in ithe Department of Planetary and Space tinuing assistance and especially for providing same tube. The sky was clear and of several computer subroutines and his un- Science, University of California, published data. We also thank J. G. Higdon excellent photometric quality. Measure- Los Angeles 90024 for writing some computer programs used in ments were obtainedwith a two-channel this work. Research supported by NASA grant NGL-05-007-005. photometer, one channel for the red References and Notes * Present address: National Accelerator Lab- [wavelength (X) ; 6000 A] and the Post Office Box 1. .E. Advan. Astron. oratory, 500, Batavia, Illinois pik, Astrophys. 2, 219 60510. other for the blue (Xk 4500 A), with (1963). 2. E. Anders, Space Sci. Rev. 3, 583 (1964). 18 June 1973 m cooled photomultipliersand pulse-count- ing electronics. Only the data from the red channel, which were of higher quality, are reportedhere. The accumu- An Atmosphereon Ganymedefrom Its Occultation lated counts (at a samplingrate of 22.25 sec- ) were displayed on a visual read- of SAO 186800 on 7 June 1972 out and recorded with a 16-mm cine camera operated at a framing rate of Abstract. On 7 June 1972 the third Jovian satellite Ganymede occulted the about 24 sec-1. Also photographedwas eighth-magnitude star SAO 186800. -Successful photoelectric observations ob- the display from an accurate quartz tained at Lembang, Java (Indonesia), and Kavalur, India, show nonabrupt im- oscillator referenced before and after mersions and emersions, indicating the presence of an atmosphere whose surface the event to radio station WWV by pressure is greater than about 10-3 millibar. By fitting the two occultation dura- using an observatorychronometer. The tions as chords to a model disk, the diameter is found to be 5270 (+ 30, - 200) absolute accuracy of the timing is esti- kilometers, the major error contribution arising from the uncertain atmospheric mated to be ? 1 second; the relative thickness below the occultation layer. The derived mean density is 2.0 (- 0.03, + accuracy during the event was + 0.1 0.2) grams per cubic centimeter. second. Dead-time corrections of ap- proximately 25 percent have been ap- A search for occultation'sof stars by predictions, photographs taken in plied to the data. Direct photographsof planets carried out by Taylor at the March 1972 at the observatoriesat the the event were also taken and have been Royal Greenwich Observatory indi- Cape of Good Hope, South Africa, published elsewhere (3). The photoelec- cated that the star SAO 186800 (mag- and Perth, Australia, were analyzed to tric tracing obtained at Lembang is nitude 8.0, type KO) would be occulted yield more accurate relative positions shown in Fig. 2. The immersion and by Ganymede (JIII) on 7 June 1972 of Ganymede and the star. The pre- emersion midpoint times are 18h47m- (1). The predicted intensity drop was dictions were accordingly refined. The 40.9+ ? 1.2s and 18h50m22.4s 1.2s in about 5 percent at visible wavelengths. predicted area of visibility included corrected universal time (U.T.C.). Since the stellar position was the southern Asia, northern Australia, and The observationsat Kavalur (78.7?E, largest single source of error in the eastern Africa. The uncertainty in the 12.6?N, 800 m above sea level) were 5 OCTOBER 1973 53 This content downloaded from 131.215.225.130 on Fri, 14 Nov 2014 12:17:50 PM All use subject to JSTOR Terms and Conditions made at the Cassegrainfocus of a 1-m N Scale to guiding errors occurred primarily in telescope with an 8-arc-second aper- - the postemersion portion of the trace E-- North Pole?, ture. The photometer signal, recorded and have been suppressed. The Lem- through a Wratten 89B filter by a bang data also show an irregularmodu- cooled RCA 7102 photomultiplier,was lation of several seconds which is due amplified by a GR 1230A electrometer ' / to scattered light from nearby Jupiter. and displayedon one of the four traces f - Kavalur, India This did not interfere with identifica- of a Tektronix 533A oscilloscope with P + tion of the event. In addition there is a a four trace plug-in module in the gradual decrease in overall intensity chopped display mode and a sweep rate during the period of observationdue to Lembang,Java of 2 cm/sec. The other three traces Ganymede's motion away from Jupiter displayed 0.1-second pips from a quartz during the course of the observations.
Load more

Recommended publications
  • Open Access Proceedings Journal of Physics: Conference Series
    Journal of Physics: Conference Series PAPER • OPEN ACCESS Related content - Fabrication of Diamond-Glass Composite Micro-gravity measurements during the total solar under Micro-Gravity Tatsuo Noma and Akira Sawaoka eclipse of 9 March 2016 in Indonesia - Magnetic compensation of the gravity by using superconducting axisymmetric coils: spherical harmonics method To cite this article: Agus Laesanpura et al 2016 J. Phys.: Conf. Ser. 771 012003 C Lorin and A Mailfert - Groundwater storage change detection using micro-gravimetric technology Mohammed El-Diasty View the article online for updates and enhancements. This content was downloaded from IP address 167.205.22.105 on 18/01/2018 at 01:59 International Symposium on Sun, Earth, and Life (ISSEL) IOP Publishing Journal of Physics: Conference Series 771 (2016) 012003 doi:10.1088/1742-6596/771/1/012003 Micro-gravity measurements during the total solar eclipse of 9 March 2016 in Indonesia Agus Laesanpura1, Taufiq Hidayat 2, Dady Abdurachman1, Putra Mahasena2, Premana W. Premadi 2, Hesti Wulandari2, Yudi Suharyadi3, Achmad Sjarmidi4 1Geophysic Engineering Study Program, ITB 2Bosscha Observatory and Astronomy Research Division, FMIPA, ITB 3Analysis Research Division, FMIPA, ITB 4School of Life Sciences and Technology, ITB E-mail: [email protected] Abstract. Since 1950s, several authors have reported the so-called anomalous gravity during the total solar eclipses through various experiments. To address this issue, in the moment of the total solar eclipse of 9 March 2016 passing most regions in Indonesia, we undertook microgravity measurements using two precise gravimeters. The measurements were made at two locations: (1) Poso (central Sulawesi), a location close to the centre passage of the total eclipse and (2) Lembang (West Java), the site of Bosscha Observatory, where the partial solar eclipse occurred.
    [Show full text]
  • The Universe and Us
    The Universe and Us Premana W. Premadi Department of Astronomy, Institut Teknologi Bandung Ganesha 10, Bandung 40132, Indonesia Universe Awareness Indonesia Bosscha Observatory Lembang 40391, Indonesia [email protected] The Scene In Lembang, West Java, elevation 1300 meter above sea level, at 17:30ish. A group of people crowding around a portable telescope, with two professional astronomers at the “helm”. They take turn to peek hard through the eye piece of the telescope, while the rest gaze directly towards the western horizon, and look at the computer monitor connected to the telescope (Figure 1). Some are noticeably tense, but most just enjoy the opportunity to be in the scientifically what considered as sacred ground: an ageing astronomical observatory. Figure 1. People trying to see the new moon The object of interest? The moon. The thin sliver of new moon. Once the sun sets and the western sky basks in orange, the crowd waits in anxiety, till the sky is dark enough, for human eyes, to detect the defining crescent in the sky. The Islamic scholars have, despite minor detailed differences, universally accepted the definition of a new month in the Hijriyah calendar, a lunar calendar; a new month is set to begin in the evening the new moon is observed after the sun is set. The moon must have passed its conjunction with the Sun preceding the sunset. The verb “to observe” here is interpreted as observation by unaided eye; a tradition that has been propagated since the seventh century, benefitting minimally from the ongoing technological and scientific advancement in the field of astronomy.
    [Show full text]
  • PROJECT ORI'on a Design Study of a System for Detecting Extrasolar Planets
    PROJECT ORI'ON A Design Study of a System for Detecting Extrasolar Planets . NASA NASA SP-436 PROJECT ORION A Design Stud? of a System for Detecting Extrasolar Planets David C.Black, Editor Arnes Research Center Nat~cnalAeroriautics and Space Adminislrat~on Scientific and Technical Information Branch 1986) Cover: Orion Nebula XI1 Photograph courtesy of Lick Observatory. Ode to Apodization Twinkle, twinkle, little star Thirty parsecs from where we are. Does your wobble through the sky Mean a planet is nearby? Or has the result come into being Because of one arcsecond seeing? -Raymond P. Vito Library of Congress Cataloging in Publication Data Main entry under title: Project Orion. (NASA SP ; 436) Bibliography: p. 1. Project Orion. I. Black, David C. 11. Series: United States. National Aeronautics and Space Administration. NASA SP ;436. QB602.9.P76 523.1'13 80-11728 For sale by the Sul~erintenclentof Documents. U.S. Gorevnmc~ntPrinting Olficc \X7a\hinrrton n C 70402 TABLE OF CONTENTS Page PREFACE ......................................... ix 1 . INTRODUCTION ................................. 1 Discovery of Our Planetary System .................. 1 Efforts .to Detect Other Planetary Systems ............. 4 Project Orion ................................... 6 2 . TOWARD DESIGN CONCEPTS ..................... 11 Remarks Concerning the Term "Planet" .............. II Detection Problem .Astrophysical Aspects ........... 12 Detectioil Problem .Terrestrial Aspects .............. 24 Detection Problem .Hardware Aspects ............... 30 Summary .....................................
    [Show full text]
  • A Study on Production of Resin from Pinus Merkusii Jungh. Et De Vriese in the Bosscha Observatory Area, West Java-Indonesia
    Asian Journal of Plant Sciences 14 (2): 89-93, 2015 . ISSN 1682-3974 ans net © 2015 Asian Network for Scientific Information Asian Network for Scientific Information RESEARCH ARTICLE OPEN ACCESS DOI: 10.3923/ajps.2015.89.93 A Study on Production of Resin from Pinus merkusii Jungh. Et De Vriese in the Bosscha Observatory Area, West Java-Indonesia A. Hadiyane, E. Sulistyawati, W.P. Asharina and Rudi Dungani School of Life Sciences and Technology, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia A R T I C L E I N F O A B S T R A C T Article History: We investigated the variability in resin production of a pine stand in Bosscha Received: May 30, 2015 Observatory Bandung (Indonesia) with the aim to exploit this natural resource in Accepted: July 11, 2015 a sustainable way. The potential resin productivity of the pine stand in observatory bosscha area has been known. Therefore, it is necessary to investigate the use of Corresponding Author: A. Hadiyane methods (quarre and drill method) in pine resin productivity. The tapping method School of Life Sciences and Technology, resulted in differences in resin production in 20-25 year-old trees. The 1 Institut Teknologi Bandung, production of extracted with the quarre method was 19.34 g treeG , meanwhile, the Jalan Ganesha 10, Bandung, drill method resulted in 32.64 g treeG1. The potential annual resin production in 40132, Indonesia bosscha observatory area were 9.29 and 15.640 t yearG1 for quarre and drill method, respectively. The resin production capacity of pine species (P.
    [Show full text]
  • Here Korokan Had Been Located
    ■ Asteroid “Korokan” and Fukuoka In 1982, an object located between Mars and Jupiter was discovered by two astronomers at Tokyo Astronomical Observatory, the forerunner of the National Astronomical Observatory of Japan. This object was named “Korokan” and in November 2017 the International Astronomical Union (IAU) officially recognized the ➡ name. Korokan was a multipurpose guest house and lodgings from the 7th to 11th Asteroid Korokan Century in what is now Jonai, Chuo Ward, Fukuoka City. At that time this area was a window for exchange between Japan and other countries. Korokan was used by many delegates, merchants, national envoys to the continent, and religious pilgrims. Photo Courtesy of Fukuoka Korokan which is emblazoned into history is now immortalized in the heavens. City Science Museum Curator Kayoko Tanno ■ A City Blending the Natural and Urban Photographer: Fumio Hashimoto At the start of the 17th Century, Fukuoka Castle was constructed on the site where Korokan had been located. This location which was home to two historically important buildings has a double registry as a National Historic Site. Now it has become Maizuru Park and is famous for its cherry blossoms. Together with Ohori Park, which had been the moat adjacent to Fukuoka Castle, it serves as a “Central Park” where many citizens take a walk or view the cherry blossoms. If you stretch your legs a little, from here you can reach Hakata Bay or Mount Abura. The ocean and mountains exist encircling Fukuoka City, making it a convenient and easy-to-live-in city blending the natural and urban. On the other hand, Fukuoka City is also a city of international exchange visited by many foreigners.
    [Show full text]
  • List of Objects on the Game Board: Square Number Object Definition 1
    List of objects on the game board: Square Number Object Definition 1 Home / A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light). The first known 3 Telescope practical telescopes were invented in the Netherlands at the beginning of the 17th century, using glass lenses. They found use in terrestrial applications and astronomy. An observatory is a location used for observing terrestrial or celestial events. Astronomy, climatology/meteorology, geology, oceanography and volcanology are examples of disciplines for which observatories have been constructed. Historically, observatories 5 Bosscha Observatory were as simple as containing an astronomical sextant (for measuring the distance between stars) or Stonehenge (which has some alignments on astronomical phenomena). Pictured is Bosscha Observatory in Indonesia. A Space shuttle is a vehicle designed for (usually) manned space flights. Past missions on space shuttles have 7 & 8 Space Shuttle Columbia launched probes, taken man to walk on the moon among many other exciting missions. Pictured is the Space Shuttle Columbia, which first flew in 1982. The aurora is a natural light display seen a high and low altitudes on Earth 11 & 12 Aurora caused by interactions in the Earths magnetic field with particles from solar winds. An event in space where a number of bright, visible meteors fly past the view 15 Meteor Shower of the Earth, all originating from a single point in the night sky, lasting for up to a few days. The first great storm recorded was in 1833, where an estimated over one hundred thousand meteors an hour, witnessed by observers through the northern hemisphere.
    [Show full text]
  • Bosscha Observatory: Challenges As a Scientific Heritage of Astronomy In
    The Role of Astronomy in Society and Culture Proceedings IAU Symposium No. 260, 2009 c International Astronomical Union 2011 D. Valls-Gabaud & A. Boksenberg, eds. doi:10.1017/S1743921311002353 Bosscha Observatory: Challenges as a scientific heritage of astronomy in Indonesia Priscilla Epifania1 and Emanuel Sungging Mumpuni2 1 Department of Architecture, Universitas Tarumanagara, Jakarta, Indonesia, Jl. Letjen S. Parman no. 1, 11440 Jakarta, Indonesia email: priscilla [email protected] 2 Indonesian Institute of Aeronautics & Space (LAPAN), Jl. Dr. Djundjunan 133, 40173 Bandung, Indonesia email: [email protected] Abstract. With over 80 years of existence, Bosscha Observatory in Lembang, West Java, In- donesia, still stands as one of the largest observatories that is registered by International Astro- nomical Union in the South East Asia region. Since first commissioned by the NISV (Netherlands Indische Sterrenkundige Vereeniging), Bosscha Observatory had played a major role in astron- omy, particularly in research and observational activities in the southern hemisphere. But the current development has produced a serious impact on Bosscha Observatory, both tangible and intangible. With the challenges Bosscha Observatory faced the past decades, what can be done in the future to conserve not only the tangible value but most importantly the intangible value it embraces for the scientific development? This paper emphasizes its values, and opens some perspectives and ideas for conserving a (candidate to) Astronomy and World Heritage site. This important issue of how to best preserve the scientific value of this scientific heritage it embodied is discussed in some detail. Keywords. Bosscha Observatory, astronomy, scientific heritage, tangible aspect, intangible value, conservation.
    [Show full text]
  • VENZHA CHRIST HONF Foundation - Citizen Lab ISSS – Indonesia Space Science Society
    VENZHA CHRIST HONF Foundation - citizen lab ISSS – Indonesia Space Science Society www.honf.org www.vufoc.space 1996 : graduate from Indonesian Institute of the Arts (ISI), Yogyakarta, Indonesia 1999 – present : director, HONF Foundation 2007 – present : artistic director, CELLSBUTTON, Yogyakarta International Media Art Festival 2010 – present : director, v.u.f.o.c : an extraterrestrial study center 2014 - present : artistic director, Transformaking : International Summit On Critical and Transformative Making 2016 – present : director, ISSS – Indonesia Space Science Society 2016 – present : director, S.E.T.I (Search for Extra-Terrestrial Intelligence) conference 2017 : guest researcher, IMeRA – Institute for Advance Study, Marseille, France 2018 : MDRS - Mars Desert Research Station, Crew191, Team Asia, Mars Society, USA Research on Space Science and Space Exploration : 2010 : Saturn Analogy of Trans Urgency, a machine installation, Ljubljana, Slovenia 2010 - 2011 : Ancient Technology and Space Exploration in Indonesia / v.u.f.o.c project 2011 : v.u.f.o.c mobile lab, Space Lab ; open/free/libre knowledge for public 2012 : NASA research center at Moffett Federal Airfield, Mountain View, California, Silicon Valley, USA : ROSSWELL research project, New Mexico, USA 2013 : AREA 51 research project, Signal from the space, Nevada, USA : Diamagneti(C/SM)Species, Istanbul Biennial 2013, Istanbul, Turkey : Griffith Observatory, Southern California’s Gateway to the Cosmos, USA : Society For Astronomical Science, California University Riverside,
    [Show full text]
  • Connecting the Scientific and Socialist Virtues of Anton Pannekoek
    CHAOKANG TAI* Left Radicalism and the Milky Way: Connecting the Scientific and Socialist Virtues of Anton Pannekoek ABSTRACT Anton Pannekoek (1873–60) was both an influential Marxist and an innovative astronomer. This paper will analyze the various innovative methods that he developed to represent the visual aspect of the Milky Way and the statistical distribution of stars in the galaxy through a framework of epistemic virtues. Doing so will not only emphasize the unique aspects of his astronomical research, but also reveal its connections to his left radical brand of Marxism. A crucial feature of Pannekoek’s astronomical method was the active role ascribed to astronomers. They were expected to use their intuitive ability to organize data according to the appearance of the Milky Way, even as they had to avoid the influence of personal experience and theoretical presuppositions about the shape of the system. With this method, Pannekoek produced results that went against the Kapteyn Universe and instead made him the first astronomer in the Netherlands to find supporting evidence for Harlow Shapley’s extended galaxy. After exploring Pannekoek’s Marxist philosophy, it is argued that both his astronomical method and his interpretation of historical materialism can be seen as strategies developed to make optical use of his particular conception of the human mind. *Institute for Theoretical Physics Amsterdam, Anton Pannekoek Institute for Astronomy, and Vossius Center for History of Humanities and Sciences, University of Amsterdam, Science Park 904,POBox94485,
    [Show full text]
  • IAU INFORMATION BULLETIN No 85
    IAU / INFORMATION BULLETIN No 85 file:///Users/luis/Desktop/IB/ib85.html Home | News | FAQ | Organization | Activities | Contact INTERNATIONAL ASTRONOMICAL UNION UNION ASTRONOMIQUE INTERNATIONALE XXIVth GENERAL ASSEMBLY August 7-18, 2000 The University of Manchester Manchester United Kingdom 1 of 57 5/19/08 10:06 AM IAU / INFORMATION BULLETIN No 85 file:///Users/luis/Desktop/IB/ib85.html PREFACE The 24th IAU General Assembly will take place at The University of Manchester, Great Britain, during the days August 7-18, 2000. The IAU Executive Committee has met and selected the principal events of the scientific programme, and a great deal of preparatory work has been done by our British hosts. This is the time to inform our colleagues world-wide of the attractions awaiting you in Manchester next year. Attendance at IAU General Assemblies is upon the invitation of the IAU President, which you will find first in this Special Issue of the Information Bulletin (IB). This IB will give you an overview of the scientific programme of the General Assembly as presently planned. It also contains all information necessary for you to register for the meeting and for planning your scientific presentations and your travel arrangements. Details on other IAU meetings in 2000 will appear in the next issue of the IB, but are already available at the IAU web site. For easy reference, a brief summary of the main items is given on p. 5, while more detailed information is given in the following sections, and Registration & Proceedings Pre-Order and Accommodation & Reservation Forms are found in the middle of this IB.
    [Show full text]
  • Contributions Bosscha Observatory
    BANDUNG INSTITUTE OF s'4XI-INOLOGY DEPARTMENT OF SCIENCE CONTRIBUTIONS from the BOSSCHA OBSERVATORY No. 45 PHOTOGRAPHIC OBSERVATIONS OF THE OCCULTATION - OF BETA SCORPII BY JUPITER by Stephen M. Larson 1 NATIONAL TECHNICAL l INFORMATION SERVICE I US Department of Commerce . .Spring.field, VA. 22151 (NASA-CR-12 9990) PHOTOGRAPHIC 'OBSERVATIONS OF THE OCCULTATION OF BETA JSCORPII BY JUPITER S.M. Larson i(Observatorium Bosscha) 1972 12 p C ______ ___ CSCL 03A G3/30 BN73-14832 ,I 832 .4 Unclas % Published with financial support 50 507 of the I.T.B. - Pelita Funds 1972 P PHOTOGRAPHIC OBSERVATIONS OF THE OCCULTATION * I'.C $p~;OF BETA SCORPII BY JUPITER 'fl. Cla . -,:: b * // ....- l: *~ v Stephen M. Larson Lunar and. Planetary Laboratory *: >~.nimiv, , -. University of Arizona - ..i " ,,, tucson Arizona ear 'odi sloe19-, 857?21 " ~iu2aoqxe edt d','d : nstc; : :. evinirIneseiqei ized : evie oi b.. 0ib"os V rh-q' . ;; n-, -- ~tormrloim ' -ABSTRACT The occultation of the multiple star Beta Scorpii by Jupiter wasobservedvisually andphotographically fr6m the Bosscha Ob- servatory in Lembang (Java) , Indonesia, on May 13 , 1971 .The photographs recorded the dimming of the stars as the light was differentially refracted by the Jovian atmosphere, and gave support to a scale height greater than 8 km. Measurement of the position of the brightest component of Beta Scorpii during in- ~gess lshosysrefractDio of -.-approximately 1'.'4 before becoming >nv,lsteppr~act:- i *o-n unobsimbev,pe,pm(,e ;.;,,:.o:.~¢~ f)l3 ~, oi.% -;;.; :.'; *; -:": - q,1 OIg i 7:021i2w 1r· : " 'r " ' ,;'f' '.- ,INTRODUCTION .... qt2 .",: : . z'. ;- . .:,,~L9serv.ving.rnswas rniade ,at.the, Bosscha Observatory in Lemibang,(Jaya), Indonesia during1the:month of May 1971 (Larson 1971- ),,in,, Prpparation.
    [Show full text]
  • Mars Laboratory Lands on Red Ink
    AA CoverOctFinal.qxd:AA Template 9/15/09 2:49 PM Page 1 9 AEROSPACE AMERICA JanuaryOctober 20092009 OCTOBER 2009 Mars laboratory lands on red ink Space debris: A growing challenge A conversation with Graham Love APUBLICATIONOFTHEAMERICANINSTITUTEOFAERONAUTICSANDASTRONAUTICS toc.OCT2009.qxd:AA Template 10/7/09 11:23 AM Page 1 October 2009 DEPARTMENTS Page 4 EDITORIAL 3 Our future in space. INTERNATIONAL BEAT 4 Europe looks for UCAV synergies. ASIA UPDATE 8 Southeast Asia reaches toward space. Page 8 WASHINGTON WATCH 10 Page 10 Aviation and spaceflight under scrutiny. HONORS & AWARDS 14 CONVERSATIONS 16 With Graham Love. VIEW FROM HERE 18 Is human spaceflight “optional”? ENGINEERING NOTEBOOK 22 NASA coating helps keep hearts beating. Page 18 OUT OF THE PAST 44 CAREER OPPORTUNITIES 46 FEATURES MARS LABORATORY LANDS ON RED INK 24 With the Mars Science Laboratory’s launch window soon closing and important Page 24 challenges remaining, NASA has acted to safeguard the troubled program. by Frank Sietzen Jr. SPACE DEBRIS:A GROWING CHALLENGE 30 As space debris proliferates, experts say portions of near-Earth orbit could become unusable if mitigating steps are not taken soon. by Leonard David CLOUDY FORECAST FOR NPOESS 38 Working hand in hand with both manufacturers and airlines, EASA’s goal is to make flying Europe’s skies as safe as possible. by James W.Canan BULLETIN Page 30 AIAA Meeting Schedule B2 AIAA Courses and Training Program B4 AIAA News B5 Meeting Program B13 Call for Papers B22 Page 38 COVER The Mars Science Laboratory is NASA’s most complex Mars effort to date.Its large rover will be housed in an aeroshell with a heat shield.For more on this ambitious program,turn to the story beginning on page 24.
    [Show full text]