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Wildcard Innovations Argo Navis: So Just How Does It Stack up to the Sky Commander? Tom Trusock – 11/2004
Copyright © 2004 CloudyNights Telescope Reviews WildCard Innovations Argo Navis: So just how does it stack up to the Sky Commander? Tom Trusock – 11/2004 Reviewed: Argo Navis Ok – so I’m lazy. Features: • Digital Telescope Well – maybe that’s not quite true. There are Computer some nights I just don’t believe in excess work. • 2 serial interfaces I’m basically a visual observer, and while I do • Dual CPU’s enjoy the challenge of the hunt – I often just • 2 Meg Ram want to get to the target. Years ago, I settled on • Multitude of Catalogs DSC’s as my one of my preferred methods of finding DSO’s – especially faint fuzzies. If you are new to DSC (Digital Setting Circles) you might want to start off by reading “A Digital Setting Circles Primer”. I’ve owned at least a half dozen different units, among them units from JMI, Celestron, Sky Commander and now the newest kid on the block; the Argo Navis. Coming out of Australia, the Argo makes use of modern technology and components, utilizing not one, but two Motorola 5206e ColdFire 40mhz 32bit CPU’s (the same family of CPU’s used in the popular Palm series of Personal Digital Assistants) 2mb of re-programmable flash memory, 512kb of static Ram, WildCard Innovations Argo Navis and 8kb of non-volatile Ram. It’s powered from 4 AA batteries or an 8 to 16V external source. When used with external power, the Argo offers an LCD heater function to assist in keeping the display functional and dew off. -
Astronomy Unusually High Magnetic Fields in the Coma of 67P/Churyumov-Gerasimenko During Its High-Activity Phase C
Astronomy Unusually high magnetic fields in the coma of 67P/Churyumov-Gerasimenko during its high-activity phase C. Goetz, B. Tsurutani, Pierre Henri, M. Volwerk, E. Béhar, N. Edberg, A. Eriksson, R. Goldstein, P. Mokashi, H. Nilsson, et al. To cite this version: C. Goetz, B. Tsurutani, Pierre Henri, M. Volwerk, E. Béhar, et al.. Astronomy Unusually high mag- netic fields in the coma of 67P/Churyumov-Gerasimenko during its high-activity phase. Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 630, pp.A38. 10.1051/0004-6361/201833544. hal- 02401155 HAL Id: hal-02401155 https://hal.archives-ouvertes.fr/hal-02401155 Submitted on 9 Dec 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. A&A 630, A38 (2019) Astronomy https://doi.org/10.1051/0004-6361/201833544 & © ESO 2019 Astrophysics Rosetta mission full comet phase results Special issue Unusually high magnetic fields in the coma of 67P/Churyumov-Gerasimenko during its high-activity phase C. Goetz1, B. T. Tsurutani2, P. Henri3, M. Volwerk4, E. Behar5, N. J. T. Edberg6, A. Eriksson6, R. Goldstein7, P. Mokashi7, H. Nilsson4, I. Richter1, A. Wellbrock8, and K. -
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. -
Mining Outer Space: Who Owns the Asteroids?
G THE B IN EN V C R H E S A N 8 8 D 8 B 1 AR SINCE WWW. NYLJ.COM VOLUME 254—NO. 19 WEDNESDAY, JULY 29, 2015 Outside Counsel Expert Analysis Mining Outer Space: Who Owns the Asteroids? ver the last two years, U.S. outer space. Most relate to navigation and business and policy makers By space flight—reflecting the aspirations have focused afresh on the Timothy G. (and limits) of the era. Two, however, commercial possibilities of the Nelson are potentially relevant: Article I of the asteroids—the solar system’s OST states that “[t]he exploration and use Ominor planetary objects. Most of these of outer space, including the moon and are located between Mars and Jupiter, other celestial bodies, shall be carried out while some are closer to Earth. Some The ‘Law’ of Space for the benefit and in the interests of all have large deposits of precious metals countries, irrespective of their degree of and other potentially valuable substanc- Until the Sputnik launch in the 1950s, economic or scientific development, and es.1 In the last few years, some private few steps had been taken in defining the shall be the province of all mankind.”8 operators have announced plans to mine legal rules relating to outer space. Indeed, Article II states that “[o]uter space, includ- them commercially, a concept that, until the only circumstance in which “owner- ing the moon and other celestial bodies, now, has been exclusively the realm of ship of space minerals” was relevant was is not subject to national appropriation science fiction.2 if someone was fortunate (or unfortunate) by claim of sovereignty, by means of use In apparent response to these initiatives, or occupation, or by any other means.”9 the House of Representatives recently The legal status of mining in Together, these articles mean that passed the “Space Resource Exploration space cannot be subdivided into national and Utilization Act of 2015,” H.R. -
Early Observations of the Interstellar Comet 2I/Borisov
geosciences Article Early Observations of the Interstellar Comet 2I/Borisov Chien-Hsiu Lee NSF’s National Optical-Infrared Astronomy Research Laboratory, Tucson, AZ 85719, USA; [email protected]; Tel.: +1-520-318-8368 Received: 26 November 2019; Accepted: 11 December 2019; Published: 17 December 2019 Abstract: 2I/Borisov is the second ever interstellar object (ISO). It is very different from the first ISO ’Oumuamua by showing cometary activities, and hence provides a unique opportunity to study comets that are formed around other stars. Here we present early imaging and spectroscopic follow-ups to study its properties, which reveal an (up to) 5.9 km comet with an extended coma and a short tail. Our spectroscopic data do not reveal any emission lines between 4000–9000 Angstrom; nevertheless, we are able to put an upper limit on the flux of the C2 emission line, suggesting modest cometary activities at early epochs. These properties are similar to comets in the solar system, and suggest that 2I/Borisov—while from another star—is not too different from its solar siblings. Keywords: comets: general; comets: individual (2I/Borisov); solar system: formation 1. Introduction 2I/Borisov was first seen by Gennady Borisov on 30 August 2019. As more observations were conducted in the next few days, there was growing evidence that this might be an interstellar object (ISO), especially its large orbital eccentricity. However, the first astrometric measurements do not have enough timespan and are not of same quality, hence the high eccentricity is yet to be confirmed. This had all changed by 11 September; where more than 100 astrometric measurements over 12 days, Ref [1] pinned down the orbit elements of 2I/Borisov, with an eccentricity of 3.15 ± 0.13, hence confirming the interstellar nature. -
The Minor Planet Bulletin
THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 36, NUMBER 3, A.D. 2009 JULY-SEPTEMBER 77. PHOTOMETRIC MEASUREMENTS OF 343 OSTARA Our data can be obtained from http://www.uwec.edu/physics/ AND OTHER ASTEROIDS AT HOBBS OBSERVATORY asteroid/. Lyle Ford, George Stecher, Kayla Lorenzen, and Cole Cook Acknowledgements Department of Physics and Astronomy University of Wisconsin-Eau Claire We thank the Theodore Dunham Fund for Astrophysics, the Eau Claire, WI 54702-4004 National Science Foundation (award number 0519006), the [email protected] University of Wisconsin-Eau Claire Office of Research and Sponsored Programs, and the University of Wisconsin-Eau Claire (Received: 2009 Feb 11) Blugold Fellow and McNair programs for financial support. References We observed 343 Ostara on 2008 October 4 and obtained R and V standard magnitudes. The period was Binzel, R.P. (1987). “A Photoelectric Survey of 130 Asteroids”, found to be significantly greater than the previously Icarus 72, 135-208. reported value of 6.42 hours. Measurements of 2660 Wasserman and (17010) 1999 CQ72 made on 2008 Stecher, G.J., Ford, L.A., and Elbert, J.D. (1999). “Equipping a March 25 are also reported. 0.6 Meter Alt-Azimuth Telescope for Photometry”, IAPPP Comm, 76, 68-74. We made R band and V band photometric measurements of 343 Warner, B.D. (2006). A Practical Guide to Lightcurve Photometry Ostara on 2008 October 4 using the 0.6 m “Air Force” Telescope and Analysis. Springer, New York, NY. located at Hobbs Observatory (MPC code 750) near Fall Creek, Wisconsin. -
Origin and Evolution of Trojan Asteroids 725
Marzari et al.: Origin and Evolution of Trojan Asteroids 725 Origin and Evolution of Trojan Asteroids F. Marzari University of Padova, Italy H. Scholl Observatoire de Nice, France C. Murray University of London, England C. Lagerkvist Uppsala Astronomical Observatory, Sweden The regions around the L4 and L5 Lagrangian points of Jupiter are populated by two large swarms of asteroids called the Trojans. They may be as numerous as the main-belt asteroids and their dynamics is peculiar, involving a 1:1 resonance with Jupiter. Their origin probably dates back to the formation of Jupiter: the Trojan precursors were planetesimals orbiting close to the growing planet. Different mechanisms, including the mass growth of Jupiter, collisional diffusion, and gas drag friction, contributed to the capture of planetesimals in stable Trojan orbits before the final dispersal. The subsequent evolution of Trojan asteroids is the outcome of the joint action of different physical processes involving dynamical diffusion and excitation and collisional evolution. As a result, the present population is possibly different in both orbital and size distribution from the primordial one. No other significant population of Trojan aster- oids have been found so far around other planets, apart from six Trojans of Mars, whose origin and evolution are probably very different from the Trojans of Jupiter. 1. INTRODUCTION originate from the collisional disruption and subsequent reaccumulation of larger primordial bodies. As of May 2001, about 1000 asteroids had been classi- A basic understanding of why asteroids can cluster in fied as Jupiter Trojans (http://cfa-www.harvard.edu/cfa/ps/ the orbit of Jupiter was developed more than a century lists/JupiterTrojans.html), some of which had only been ob- before the first Trojan asteroid was discovered. -
Academic Zodiac & RTRRT Publications
Oh, look: it's full of stars! http://lulu.com/astrology The Happiness Formula is 22:16. First published by Klaudio Zic Publications, 2011 http://stores.lulu.com/astrology Copyright © 2011 By Klaudio Zic. All Rights Reserved. No part of this material may be reproduced or transmitted in any form or by any means, electronic or otherwise, for commercial purposes or otherwise, without the written permission of the Author. The names of dedicated publications are normally given in italics. Academic Zodiac & RTRRT Publications Copyright © 2011 by Klaudio Zic, all rights reserved. http://www.lulu.com/astrology Is there a happiness formula? If there is one, we believe we have found it. From time immemorial, we have been told to tell the truth in order to be happy forever after; well, here it is: your own true horoscope according to the original zodiac. If you were looking for truth, the search ends here: you have found the Academic Zodiac. Your true stars will help your original mind out of its frozen niche. A bit dusty after years of hibernation, your original self bursts open within a world of infinite possibilities. You can create and recreate events much as you can discreate the unwanted ones forever. Buss the slumbering princess, kiss the frog & prince charming and welcome to your enchanted kingdom full of goodies and birthright charms. Academic Zodiac & RTRRT Publications How does one find an appropriate publication? The publication of your own choice is found by searching the lulu.com site for relevant results. The helpful site inkmesh.com is particularly useful in determining price range, e.g. -
The Orbital Distribution of Near-Earth Objects Inside Earth’S Orbit
Icarus 217 (2012) 355–366 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus The orbital distribution of Near-Earth Objects inside Earth’s orbit ⇑ Sarah Greenstreet a, , Henry Ngo a,b, Brett Gladman a a Department of Physics & Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, British Columbia, Canada b Department of Physics, Engineering Physics, and Astronomy, 99 University Avenue, Queen’s University, Kingston, Ontario, Canada article info abstract Article history: Canada’s Near-Earth Object Surveillance Satellite (NEOSSat), set to launch in early 2012, will search for Received 17 August 2011 and track Near-Earth Objects (NEOs), tuning its search to best detect objects with a < 1.0 AU. In order Revised 8 November 2011 to construct an optimal pointing strategy for NEOSSat, we needed more detailed information in the Accepted 9 November 2011 a < 1.0 AU region than the best current model (Bottke, W.F., Morbidelli, A., Jedicke, R., Petit, J.M., Levison, Available online 28 November 2011 H.F., Michel, P., Metcalfe, T.S. [2002]. Icarus 156, 399–433) provides. We present here the NEOSSat-1.0 NEO orbital distribution model with larger statistics that permit finer resolution and less uncertainty, Keywords: especially in the a < 1.0 AU region. We find that Amors = 30.1 ± 0.8%, Apollos = 63.3 ± 0.4%, Atens = Near-Earth Objects 5.0 ± 0.3%, Atiras (0.718 < Q < 0.983 AU) = 1.38 ± 0.04%, and Vatiras (0.307 < Q < 0.718 AU) = 0.22 ± 0.03% Celestial mechanics Impact processes of the steady-state NEO population. -
The Physical Characterization of the Potentially-‐Hazardous
The Physical Characterization of the Potentially-Hazardous Asteroid 2004 BL86: A Fragment of a Differentiated Asteroid Vishnu Reddy1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Email: [email protected] Bruce L. Gary Hereford Arizona Observatory, Hereford, AZ 85615, USA Juan A. Sanchez1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Driss Takir1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Cristina A. Thomas1 NASA Goddard Spaceflight Center, Greenbelt, MD 20771, USA Paul S. Hardersen1 Department of Space Studies, University of North Dakota, Grand Forks, ND 58202, USA Yenal Ogmen Green Island Observatory, Geçitkale, Mağusa, via Mersin 10 Turkey, North Cyprus Paul Benni Acton Sky Portal, 3 Concetta Circle, Acton, MA 01720, USA Thomas G. Kaye Raemor Vista Observatory, Sierra Vista, AZ 85650 Joao Gregorio Atalaia Group, Crow Observatory (Portalegre) Travessa da Cidreira, 2 rc D, 2645- 039 Alcabideche, Portugal Joe Garlitz 1155 Hartford St., Elgin, OR 97827, USA David Polishook1 Weizmann Institute of Science, Herzl Street 234, Rehovot, 7610001, Israel Lucille Le Corre1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Andreas Nathues Max-Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany 1Visiting Astronomer at the Infrared Telescope Facility, which is operated by the University of Hawaii under Cooperative Agreement no. NNX-08AE38A with the National Aeronautics and Space Administration, Science Mission Directorate, Planetary Astronomy Program. Pages: 27 Figures: 8 Tables: 4 Proposed Running Head: 2004 BL86: Fragment of Vesta Editorial correspondence to: Vishnu Reddy Planetary Science Institute 1700 East Fort Lowell Road, Suite 106 Tucson 85719 (808) 342-8932 (voice) [email protected] Abstract The physical characterization of potentially hazardous asteroids (PHAs) is important for impact hazard assessment and evaluating mitigation options. -
Nd AAS Meeting Abstracts
nd AAS Meeting Abstracts 101 – Kavli Foundation Lectureship: The Outreach Kepler Mission: Exoplanets and Astrophysics Search for Habitable Worlds 200 – SPD Harvey Prize Lecture: Modeling 301 – Bridging Laboratory and Astrophysics: 102 – Bridging Laboratory and Astrophysics: Solar Eruptions: Where Do We Stand? Planetary Atoms 201 – Astronomy Education & Public 302 – Extrasolar Planets & Tools 103 – Cosmology and Associated Topics Outreach 303 – Outer Limits of the Milky Way III: 104 – University of Arizona Astronomy Club 202 – Bridging Laboratory and Astrophysics: Mapping Galactic Structure in Stars and Dust 105 – WIYN Observatory - Building on the Dust and Ices 304 – Stars, Cool Dwarfs, and Brown Dwarfs Past, Looking to the Future: Groundbreaking 203 – Outer Limits of the Milky Way I: 305 – Recent Advances in Our Understanding Science and Education Overview and Theories of Galactic Structure of Star Formation 106 – SPD Hale Prize Lecture: Twisting and 204 – WIYN Observatory - Building on the 308 – Bridging Laboratory and Astrophysics: Writhing with George Ellery Hale Past, Looking to the Future: Partnerships Nuclear 108 – Astronomy Education: Where Are We 205 – The Atacama Large 309 – Galaxies and AGN II Now and Where Are We Going? Millimeter/submillimeter Array: A New 310 – Young Stellar Objects, Star Formation 109 – Bridging Laboratory and Astrophysics: Window on the Universe and Star Clusters Molecules 208 – Galaxies and AGN I 311 – Curiosity on Mars: The Latest Results 110 – Interstellar Medium, Dust, Etc. 209 – Supernovae and Neutron -
THE DISTRIBUTION of ASTEROIDS: EVIDENCE from ANTARCTIC MICROMETEORITES. M. J. Genge and M. M. Grady, Department of Mineralogy, T
Lunar and Planetary Science XXXIII (2002) 1010.pdf THE DISTRIBUTION OF ASTEROIDS: EVIDENCE FROM ANTARCTIC MICROMETEORITES. M. J. Genge and M. M. Grady, Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD (email: [email protected]). Introduction: Antarctic micrometeorites (AMMs) due to aqueous alteration. Some C2 fgMMs contain are that fraction of the Earth's cosmic dust flux that tochilinite and are probably directly related to the CM2 survive atmospheric entry to be recovered from Antar- chondrites, however, others may differ from CMs in tic ice. Models of atmospheric entry indicate that, due their mineralogy. to their large size (>50 µm), unmelted AMMs are de- C1 fgMMs are particles with compact matrices that rived mainly from low geocentric velocity sources such are homogeneous in Fe/Mg and show little contrast in as the main belt asteroids [1]. The production of dust in BEIs. These are similar to the CI1 chondrites and do the main belt by small erosive collisions and the deliv- not contain recognisable psuedomorphs after anhy- ery of dust-sized debris to Earth by P-R light drag drous silicates and thus have been intensely altered by should ensure that AMMs are a much more representa- water. C1 fgMMs often contain framboidal magnetite tive sample of main belt asteroids than meteorites. clusters. The relative abundances of different petrological C3 fgMMs have porous matrices (often around types amongst 550 AMMs collected from Cap Prud- 50% by volume) and are dominated by micron-sized homme [2] is reported and compared with the abun- Mg-rich olivine and pyroxenes linked by a network of dances of asteroid spectral-types in the main belt.