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New Double Stars from Asteroidal Occultations, 1971 - 2008
Vol. 6 No. 1 January 1, 2010 Journal of Double Star Observations Page 88 New Double Stars from Asteroidal Occultations, 1971 - 2008 Dave Herald, Canberra, Australia International Occultation Timing Association (IOTA) Robert Boyle, Carlisle, Pennsylvania, USA Dickinson College David Dunham, Greenbelt, Maryland, USA; Toshio Hirose, Tokyo, Japan; Paul Maley, Houston, Texas, USA; Bradley Timerson, Newark, New York, USA International Occultation Timing Association (IOTA) Tim Farris, Gallatin, Tennessee, USA Volunteer State Community College Eric Frappa and Jean Lecacheux, Paris, France Observatoire de Paris Tsutomu Hayamizu, Kagoshima, Japan Sendai Space Hall Marek Kozubal, Brookline, Massachusetts, USA Clay Center Richard Nolthenius, Aptos, California, USA Cabrillo College and IOTA Lewis C. Roberts, Jr., Pasadena, California, USA California Institute of Technology/Jet Propulsion Laboratory David Tholen, Honolulu, Hawaii, USA University of Hawaii E-mail: [email protected] Abstract: Observations of occultations by asteroids and planetary moons can detect double stars with separations in the range of about 0.3” to 0.001”. This paper lists all double stars detected in asteroidal occultations up to the end of 2008. It also provides a general explanation of the observational method and analysis. The incidence of double stars with a separation in the range 0.001” to 0.1” with a magnitude difference less than 2 is estimated to be about 1%. Vol. 6 No. 1 January 1, 2010 Journal of Double Star Observations Page 89 New Double Stars from Asteroidal Occultations, 1971 - 2008 tions. More detail about the method of analysis is set Introduction out in the Appendix. Asteroids and planetary moons will naturally oc- cult many stars as they move through the sky. -
Herschel Celestial Calibration Sources: Four Large Main-Belt Asteroids As
Experimental Astronomy manuscript No. (will be inserted by the editor) Herschel celestial calibration sources Four large main-belt asteroids as prime flux calibrators for the far-IR/sub-mm range Thomas M¨uller Zoltan´ Balog Markus Nielbock Tanya· Lim David Teyssier· Michael Olberg· Ulrich· Klaas Hendrik· Linz Bruno Altieri· Chris Pearson· George Bendo· Esa Vilenius · · · Received: date / Accepted: date Abstract Celestial standards play a major role in observational astrophysics. They are needed to characterise the performance of instruments and are paramount for photometric calibration. During the Herschel Calibration Asteroid Preparatory Pro- gramme approximately 50 asteroids have been established as far-IR/sub-mm/mm calibrators for Herschel. The selected asteroids fill the flux gap between the sub- mm/mm calibrators Mars, Uranus and Neptune, and the mid-IR bright calibration stars. All three Herschel instruments observed asteroids for various calibration pur- poses, including pointing tests, absolute flux calibration, relative spectral response function, observing mode validation, and cross-calibration aspects. Here we present newly established models for the four large and well characterized main-belt aster- oids (1) Ceres, (2) Pallas, (4) Vesta, and (21) Lutetia which can be considered as new prime flux calibrators. The relevant object-specific properties (size, shape, spin- properties, albedo, thermal properties) are well established. The seasonal (distance to T. M¨uller, E. Vilenius Max Planck Institute for Extraterrestrial Physics, PO Box 1312, Giessenbachstrasse, 85741 Garching, Germany Tel.: +49 89 30000-3499 E-mail: [email protected] Z. Balog, M. Nielbock, U. Klaas, H. Linz Max Planck Institute for Astronomy, K¨onigstuhl 17, 69117 Heidelberg, Germany T. -
194 9 Ce Le B Rating 65 Ye Ars O F Br Inging As Tr on Omy T O No Rth Te X
1949 Celebrating 65 Years of Bringing Astronomy to North Texas 2014 Contact information: Inside this issue: Info Officer (General Info) – [email protected]@fortworthastro.com Website Administrator – [email protected] Postal Address: Page Fort Worth Astronomical Society Thank You from the VP 3 3812 Fenton Avenue 4 Fort Worth, TX 76133 New Members Welcome Web Site: http://www.fortworthastro.org April Club Calendar 5 Facebook: http://tinyurl.com/3eutb22 Celestial Events 6 Twitter: http://twitter.com/ftwastro Yahoo! eGroup (members only): http://tinyurl.com/7qu5vkn Moon Phase Calendar 7 Officers (2013-2014): Mars/Venus Data Sheet 8 President – Jim Murray, [email protected] – Jupiter Data Sheet 9 Vice President – Matt Reed, [email protected] Sec/Tres – Lewis Westerfield, [email protected] Mars At Opposition 10 Board Members: Spring Telescope Fever 12 2012-2014 Cloudy Night Library 13 Phil Stage Bruce Cowles Winter Star Party Report 14 2013-2015 AL Observing Club of the Month 15 Bill Nichols Jim Craft Constellation of the Month 16 Cover Photo: Constellation Mythology 17 NASA's Hubble Space Telescope took this close-up of the red planet Mars when it was just 34,648,840 Young Astronomer News 18 miles (55,760,220 km) away. This color image was assembled from a series of exposures taken be- Business Meeting Minutes 21 tween 6:20 p.m. and 7:12 p.m. EDT Aug. 26 with Hubble's Wide Field and Planetary Camera 2. The Prior Club Meeting Minutes 22 picture was taken just 11 hours before the planet made its closest approach to Earth in 60,000 years. -
The Complete the Complete Guide to Guide to Guide to Observing Observing Lunar, Grazing and Lunar, Grazing and Asteroid Occulta
The Complete Guide to Observing Lunar, Grazing and Asteroid Occultations Published by the International Occultation Timing Association Richard Nugent, Editor Copyright 2007 International Occultation Timing Association, Richard Nugent, Editor. All rights reserved. No part of this publication may be reproduced, distributed or copied in any manner without the written permission from the Editor in Chief. No part of this publication may be reproduced, stored in any retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under the 1976 United States Copyright Act and with the written permission of the Editor and Publisher. Request to the Editor should be sent via email: [email protected]. While the Editor, Authors and Publisher have made their best efforts in preparing the IOTA Occultation Manual, they make no representation or warranties with respect to the accuracy and completeness regard to its contents. The Publisher, Editor and Authors specifically disclaim any implied warranties of merchantability or fitness of the material presented herein for any purpose. The advice and strategies contained herein may not be suitable for your situation and the reader and/or user assumes full responsibility for using and attempting the methods and techniques presented. Neither the publisher nor the authors shall be liable for any loss of profit or any damages, including but not limited to special, incidental, consequential, or other damages and any loss or injury. Persons are advised that occultation observations involve substantial risk and are advised to take the necessary precautions before attempting such observations. Editor in Chief: Richard Nugent Assistant Editor: Lydia Lousteaux Contributors: Trudy E. -
Astrometric Masses of 21 Asteroids, and an Integrated Asteroid Ephemeris
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Springer - Publisher Connector Celestial Mech Dyn Astr (2008) 100:27–42 DOI 10.1007/s10569-007-9103-8 ORIGINAL ARTICLE Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris James Baer · Steven R. Chesley Received: 28 June 2007 / Revised: 14 October 2007 / Accepted: 25 October 2007 / Published online: 18 December 2007 © Springer Science+Business Media B.V. 2007 Abstract We apply the technique of astrometric mass determination to measure the masses − of 21 main-belt asteroids; the masses of 9 Metis (1.03 ± 0.24 × 10 11 M), 17 Thetis − − (6.17 ± 0.64 × 10 13 M), 19 Fortuna (5.41 ± 0.76 × 10 12 M), and 189 Phthia (1.87 ± − 0.64×10 14 M) appear to be new. The resulting bulk porosities of 11 Parthenope (12±4%) and 16 Psyche (46±16%) are smaller than previously-reported values. Empirical expressions modeling bulk density as a function of mean radius are presented for the C and S taxonomic classes. To accurately model the forces on these asteroids during the mass determination process, we created an integrated ephemeris of the 300 large asteroids used in preparing the DE-405 planetary ephemeris; this new BC-405 integrated asteroid ephemeris also appears useful in other high-accuracy applications. Keywords N-body · Asteroid · Ephemerides · Asteroid masses · Astrometric masses · Asteroid porosity 1 Introduction The technique of astrometric mass determination, in which the deflection of a small body’s trajectory allows us to deduce the mass of a larger perturbing body, may be entering a partic- ularly fruitful period, as near-Earth asteroid (NEA) surveys coincidentally produce a flood of high-precision main-belt asteroid observations. -
Reports of Planetary Astronomy -1989
~ ~~ NASA Technical Memorandum 4120 Reports of Planetary Astronomy -1989 NASA Ofice of Space Science and Applications Washington, D.C, National Aeronautics and Space Administration Office of Management Scientific and Technical Information Division 1989 PREFACE This publication is a compilation of summaries of reports written by Principal Investigators funded through the Planetary Astronomy Program of NASA's Solar System Exploration Division, Office of Space Science and Applications. The summaries are designed to provide information about current scientific research projects conducted in the Planetary Astronomy Program and to facilitate communications and coordination among concerned scientists and interested persons in universities, government, and industry. The reports are published as they were submitted by the Principal Investigators and have not been edited. They are arranged in alphabetical order. In a second section, highlights of recent accomplishments in Planetary Astronomy are summarized as they were submitted by the principal investigators. The name attached to an individual paragraph is generally the name of the person who submitted that paragraph. Jurgen Rahe Discipline Scientist Planetary Astronomy Program Solar System Exploration Division June 1989 I11 ~ LIST OF PRINCIPAL INVESTIGATORS AIHearn, M.F. UMD Observations of Comets and Asteroids A'Hearn, M.F. UMD Theoretical Spectroscopy of I Comets Baum, W.A. LOWELL Planetary Research at Lowell Observatory Beebe, R. NMSU Long-Term Changes in Reflectivity and Large Scale Motions in the Atmospheres of Jupiter and Saturn Bell, J .F . UHI Infrared Spectral Studies of Asteroids Bell, J .F . UHI Reflectance Spectroscopy of Phobos and Deimos Belton, M.J.S. KPNO Photometric and Astrometric Reductions of P/Halley CCD Data Binzel, R.P. -
Horizon-Vol 21-No 03
R I Z Vol. 21 Issue 3 O O LA SOCIÉTÉ ROYALE D’ASTRONOMIE DU CANADA th New Brunswick Centre du Nouveau-Brunswick 20 Anniversary H THE ROYAL ASTRONOMICAL SOCIETY OF CANADA N ASTROPIC It is July 1, 2020 and I am starting an unscheduled Astropic started in the Summer 2001 issue with this Astrovid 2000 capture of the lunar crater edition of our newsletter. On this date 20 years ago, Clavius by Adrien Bordage. Others include a lunar eclipse by Michael Boulay using a Canon the RASC approved the formation of the Moncton S40 (Spring 2003), Derek Lapointe’s sketch of Mars (Winter 2004), and Tim Doucette’s jaw- Centre at their Annual General Meeting. Later that dropping image of Saturn from 529 stacked shots of a Vista Pro webcam (Winter 2005). year we had our formative meetings and the first issue of our as-yet unnamed newsletter was mailed to our members. A few years later we started phasing in electronic distribution, which included colour. In this special issue you will find material from the first seven Volumes, with some introductory editorial com- ments. A blast from the past for many, perhaps a re- cent history lesson for others. It’s Official: HORIZON Wins (from Winter 2001) There were eight entries submitted for our “Name the Newsletter” contest: La Revolutionibus, Horizon, Con- stellation, Magnitude, Azimuth, Zoom, Photon, and Cosmos. All entries were required to be related to astronomy and spelled the same in French and Eng- lish. The first round of voting selected the two final- ists: Horizon (submitted by Andrew Leger) and Pho- ton (submitted by Adrien Bordage). -
56-2 Spring 2019
THE VALLEY SKYWATCHER CONTENTS ___________________ The Official Publication of the Chagrin Articles Valley Astronomical Society Ptesident’s Corner 1 Est. 1963 Late Spring Binocular Veiwing 12 President’s Corner Screech Owl Hill Observatory 17 Book Review: Celestial Shadows 18 Hello All, ___________________ I’d like to take this time to update you on a Regular Features project I have been Observer’s Log 4 working on with Martin Notes & News 10 Constellation Quiz 14 Mullet on behalf of the Deep Thoughts on club. We have been Engineering and Physics 20 working on a Jr. Astronomy club in partnership with the ____________________ Geauga Park District, CVAS Officers the Foundation for Geauga Parks, the Geauga County Public Library and Burton Public Library. George Trimble President Ian Cooper Vice President The group will be called Geauga Skywatchers Club. Steve Fishman Treasurer Our tagline is “We Look Up.” It is geared for Joe Maser Secretary Gus Saikaly Director of grades 6-12. The Foundation was kind enough to Observations finance the telescopes available at the library Sam Bennici Observatory Director branches for club members and other patrons to Dan Rothstein Historian check out. Chris Powell Editor Our members will be hosting monthly meetings ______________________ within the public libraries, or at Observatory Park. We will provide hands on activities and lectures, CVAS along with access to equipment and supervised PO Box 11 observing. I will be calling on our member Chagrin Falls, OH 44022 volunteers to help with these sessions when the time www.chagrinvalleyastronomy.org comes. If you see a topic you would like to volunteer for, let me know. -
Occuttau'm@Newstener
Occuttau'm@Newstener Volume III, Number 3 March, 1983 Occultation Newsletter is published by the International Occultation Timing Association. Editor and Compositor: H. F. DaBo11; 6 N 106 White Oak Lane; St. Charles, IL 60174; U.S.A. Please send editorial matters to the above, but send address changes, requests, matters of circulation, and other IOTA business to IOTA; P.0. Box 596; Tiniey Park; IL 60477; U.S.A. FROM THE PUBLISHER Astrographic Catalog data to create a data set need- ed to compute extended-coverage USNO total occulta- This is the first issue of 1983. tion predictions for the lunar eclipse of june 25. Since I do not want to (or have time tO) distribute o.n.'s price is $1.40/issue, or $5.50/year (4 is- extended-coverage predictions twice during the year, sues) including first class surface mailing. Back I will not do so until either I have processed the issues through vol. 2, No. 13, still are priced at additional S.A.C. data or until after the eclipse only $1.00/issue; later issues @ $1.40. Please see (when it will not make as much difference). At the masthead for the ordering address. Air mail least, I should be able to do it in time for the shipment of o.n. back issues and subscriptions is waning-phase passages through the northern Milky Way 45¢/issue ($1.80/year) extra, outside the U.S.A., starting in August. L.- Canada, and Mexico. The versatile push-button short-wave time signal re- IOTA membership, subscription included, is $11.00/ ceiver, Timekube, no longer is being manufactured, year for residents of North America (including Mexi- and Radio Shack is selling off its supply at reduced CO) and $16.00/year for others, to cover costs of prices, as low as $17. -
CV APPENDIX IV: Glenn Schneider – Publication List (15 April 2021)
CV APPENDIX IV: Glenn Schneider – Publication List (15 April 2021) Refereed Journals (130 published, 2 accepted, 2 submitted/in review) 1R. Schneider, G. 1982, "Fourier Transformation by Harmonic Analysis", APL Quote Quad, 11-2, 19 2R. Schneider, G. 1982, "Inverse Fourier Transformation", APL Quote Quad, 11-2, 21 3R. Dunham, E. W., Baron, R. L., Conner, S., Dunham, D. W., Dunham, J. B., Schneider, G., Cohen, H. L., Helms, V. T. III, Croom, M., & Safko, J. 1984, "Results from the Occultation of 14 Piscium by (51) Nemausa", Astronomical Journal, 89, 1755 4R. Millis, R. L., Wasserman, L. H., Franz, O. G., Nye, R. A., Oliver, R. C., Kreidl, T. J., Jones, S. E., Hubbard, W., Lebofsky, L., Goff, R., Marcialis, R., Sykes, M., Fecker, J., Hunten, D., Zellner, B., Reitsema, H., Schneider, G., Dunham, E., Klavetter, J., Meech, K., Oswalt, T., Rayfert, J., Strothers, E., Smith, J., Povenmire, H., Jones, B., Kornbluh, D., Reed, L., Izon, K., A'Hearn, M. F., Schnurr, R., Osborn, W., Klemola, A., Rios, M., Sanchez, A., Pirronen, J., Mooney, M., Ireland, S., Parker, D., Douglas, W. T., Beish, J. D., & Leibow, D. 1987, "The Size, Shape, Density, and Albedo of Ceres from Its Occultation of BD+08 471", Icarus, 72, 507 5R. Schneider, G. 1989, "The Jurkevich Periodogram", APL Quote Quad, 19-2, 23 6R. Schneider, G., Paluzzi, P., & Oliver, J. P. 1989, "Systematic Error in the Synoptic Sky Cover Record of the South Pole", Journal Of Climate, 2, 295 7R. Dunham, D. W., Dunham, J. B., A'Hearn, M. F., Schnurr, R., Binzel, R. -
Combining Asteroid Models Derived by Lightcurve Inversion With
Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes Josef Durechˇ a,∗, Mikko Kaasalainenb, David Heraldc, David Dunhamd, Brad Timersone, Josef Hanuˇsa, Eric Frappaf, John Talbotg, Tsutomu Hayamizuh, Brian D. Warneri, Frederick Pilcherj, Adri´an Gal´adk,l aAstronomical Institute, Faculty of Mathematics and Physics, Charles University in Prague, V Holeˇsoviˇck´ach 2, CZ-18000 Prague, Czech Republic bDepartment of Mathematics, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland c3 Lupin Pl, Murrumbateman, NSW, Australia dInternational Occultation Timing Association (IOTA) and KinetX, Inc., 7913 Kara Ct., Greenbelt, MD 20770, USA eInternational Occultation Timing Association (IOTA), 623 Bell Rd., Newark, NY, USA f1 bis cours Jovin Bouchard 42000 Saint-Etienne, France gOccultation Section, Royal Astronomical Society of New Zealand, P.O. Box 3181, Wellington, New Zealand hJapan Occultation Information Network (JOIN), Sendai Space Hall, 2133-6 Nagatoshi, Kagoshima pref, Japan iPalmer Divide Observatory, 17955 Bakers Farm Rd., Colorado Springs, CO 80908, USA j4438 Organ Mesa Loop, Las Cruces, NM 88011, USA kModra Observatory, FMFI Comenius University, 842 48 Bratislava, Slovakia lOndˇrejov Observatory, AV CR,ˇ 251 65 Ondˇrejov, Czech Republic Abstract Asteroid sizes can be directly measured by observing occultations of stars by asteroids. When there are enough observations across the path of the shadow, the asteroid’s projected silhouette can be reconstructed. Asteroid shape models derived from photometry by the lightcurve inversion method enable us to predict the orientation of an asteroid for the time of occultation. By scaling the shape model to fit the occultation chords, we can determine the asteroid size with a relative accuracy of typically ∼ 10%. -
Glenn Schneider – Curriculum Vitae: Table of Contents (15 April 2021)
Glenn Schneider – Curriculum Vitae: Table of Contents (15 April 2021) CURRICULUM VITA ………………………………………………………….…….. 1 Citizenship ……………………………………………………….……….. 1 Education ………………………………………………………….…….. 1 Professional Employment/Appointments …………………………………….….. 1 Professional/Research Positions Held ………………………………………... 1 Professional Experience ……………………………………………….……….. 1 Science ………………………………………………………... 1 Instrumentation & Techniques ……………………………….……….. 1 Synopsis …………………………………………………………….….. 2 Externally Sponsored Research Program Awards ………………………………… 2 Publications ………………………………………………………………………… 4 Summary ………………………………………………………… 4 Selected 1st Author/Oft-Cited Papers ………………………………… 4 Professional Service ………………………………………………………… 4 Observing Experience ………………………………………………………… 4 Platforms/Instruments - Space ………………………………………… 4 Facilities/Instruments - Ground ………………………………………… 5 Teaching Experience ………………………………………………………………… 5 Selected Invited/Review/Keynote/Research Talks ………………………………… 5 Professional Honors/Awards ………………………………………………………… 5 Professional Society Affiliations ………………………………………………… 5 APPENDIX I – Prior Employment, Functional Positions and Appointments ………… 6 The University of Arizona – Steward Observatory ………………………………… 6 Computer Sciences Corp. – Operations Astronomer @ STScI ………………… 8 Catonsville Community College …………………………………………………10 University of Florida – Department of Astronomy & Space Astronomy Lab …10 Warner Computer Systems …………………………………………………………11 APPENDIX II – Current Research Projects (Summaries) …………………………………12 Externally Sponsored