DOCSLIB.ORG

David Levy Among the Stars Astrophotographers Take Note! This Space Is Reserved for Your B&W Or Greyscale Images

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
David Levy Among the Stars Astrophotographers Take Note! This Space Is Reserved for Your B&W Or Greyscale Images The Journal of The Royal Astronomical Society of Canada PROMOTING ASTRONOMY IN CANADA October/octobre 2013 Volume/volume 107 Le Journal de la Société royale d’astronomie du Canada Number/numéro 5 [762] Inside this issue: David Levy, Fireflies, and Arcturus David Levy Comes Home Astronomers Kiss and Tell Rendezvous with the Stars Tribute to Jim Hesser Strategies for Making Friends David Levy among the stars Astrophotographers take note! This space is reserved for your B&W or greyscale images. Give us your best shots! Steve Holmes is an aficionado of narrowband αH photography, as seen in this image of the Cygnus wall—the ridge of high emissivity in the North America Nebula that gives form to the Central America portion. The Wall is an ionization front where high-energy ultraviolet light encounters a high-density portion of the dust and gas that makes up the nebula. October/octobre 2013 | Vol. 107, No. 5 | Whole Number 762 contents / table des matières Feature Articles / Articles de fond 212 Imager’s Corner: Recovering Star Colours by Blair MacDonald 186 David Levy, Fireflies, and Arcturus 214 Rising Stars: Peter McMahon—From Star Wars to Grace the London Centre SkyNews and Beyond by Dale Armstrong by John Crossen 187 David Levy Comes Home by Randy Attwood 216 Cheap Stuff From China: Doing Astro-stuff with a Raspberry Pi 188 Astronomers Kiss and Tell—Imperfections Revealed by Rick Saunders by Richard J. Legault 219 On Another Wavelength: The Lunar Atmosphere 199 What to Do When the Astrologer Crashes and Dust Environment Explorer Your Star Party: Strategies for Making Friends by David Garner and Influencing Enemies by R.A. Rosenfeld 220 Second Light: Enceladus’s Tidally Driven “Tiger Stripes” 202 Rendezvous with the Stars and the Universe, Too by Leslie J. Sage by Maureen Arges Nadin 207 A Tribute to Jim Hesser by John R. Percy Departments / Départements 182 News Notes/En manchettes Columns / Rubriques Compiled by Andrew I. Oakes 203 Pen and Pixel Extra: – Spectrographic analysis establishes exoplanet’s colour Scenes from the General Assembly – Report details 2020 Mission to Mars – Two Plutonian moons feature mythical names – Scientific achievements bring prestigious recognitions 205 Pen and Pixel: Helix Nebula / Conjunction / – Earth and Moon seen from Saturn and Mercury vantage Noctilucent Clouds / Cocoon Nebula points Randy Krall / Joel Parkes / Sheila Wiwchar / Lynn Hilborn – New robotic telescope LT2 to be double in size 209 Through My Eyepiece: The Big Picture 222 Reviews/Critiques by Geoff Gaherty The Cambridge Photographic Moon Atlas / Introduction to Planetary Geomorphology / The Quest to Regain Paradise / 210 Cosmic Contemplations: An Ultraportable Open, Our Enigmatic Universe: One Astronomer’s Reflections Folded, 8.5-inch ƒ/12.5 Refractor on the Human Condition by Jim Chung 227 Society News by James Edgar 228 Astrocryptic by Curt Nason 228 It’s Not All Sirius—Cartoon by Ted Dunphy Front cover — David Levy and Kingston Centre President Sue Gagnon observe from the Lennox and Addington Dark-Sky Viewing Area. David shows Sue the area in the sky where he discovered his first comet. Photo: Terence Dickinson. October / octobre 2013 JRASC | Promoting Astronomy in Canada 181 The Journal is a bi-monthly publication of The Royal News Notes / En manchettes Astronomical Society of Canada and is devoted to the advancement of astronomy and allied sciences. Compiled by Andrew I. Oakes It contains articles on Canadian astronomers and current activities of the RASC and its ([email protected]) Centres, research and review papers by professional and amateur astronomers, and articles of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material Spectrographic analysis establishes prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institutional affiliations are asked to pay publication charges of $100 per exoplanet’s colour page. Such charges are waived for RASC members who do not have access to professional funds as well as for solicited articles. Manuscripts and other submitted material may be Planet HD 189733b, orbiting a star 63 light-years away from in English or French, and should be sent to the Editor-in-Chief. Earth, is cobalt blue in colour say astronomers studying the Editor-in-Chief Contributing Editors exoplanet’s reflected light. Using the Hubble Space Telescope’s Jay Anderson Jim Chung (Cosmic Contemplations) 203 – 4920 Dundas St W John Crossen (Rising Stars) Imaging Spectrograph, astronomers have measured changes in the Toronto ON M9A 1B7, Canada Ted Dunphy (It’s Not All Sirius) colour of light from the exoplanet before, during, and after a Email: [email protected] Geoff Gaherty (Through My Eyepiece) Web site: www.rasc.ca Dave Garner (On Another Wavelength) pass behind its yellow-orange star. The planet is a “hot Jupiter,” Telephone: (416) 924-7973 Blair MacDonald (Imager’s Corner) a class of large planets orbiting close to their parent stars. Fax: (416) 924-2911 Curt Nason (Astrocryptic) Andrew I. Oakes (News Notes) Associate Editor-in-Chief Randall Rosenfeld (Art & Artifact) During observations, researchers saw the light becoming less Nicole Mortillaro Leslie J. Sage (Second Light) Email: [email protected] bright in the blue but not in the green or red. The missing blue Rick Saunders (Cheap Stuff From China) light when the object was hidden meant that the planet that Associate Editor, Research David Turner (Reviews) Douglas Hube disappeared had that colour. Despite its deep-blue-dot Proofreaders Email: [email protected] Ossama El Badawy appearance, the exoplanet is not considered Earth-like. The Associate Editor, General Margaret Brons daytime temperature on the planet is nearly 1100 degrees Michael Attas Angelika Hackett Email: [email protected] Terry Leeder Celsius, while the night-side temperatures are lower by about Assistant Editors Kim Leitch 250 degrees, with fierce winds travelling at about 7200 km/h Suzanne Moreau Michael Allen from the day side to the night side. Discovered in 2005, the Martin Beech Design/Production Dave Chapman Michael Gatto, Grant Tomchuk exoplanet, only 4.64 million kilometres from its star, is Ralph Chou Email: [email protected], gravitationally locked to its parent, so that one side permanently Ralph Croning [email protected] Dave Garner faces the star while the other side is perpetually dark. Advertising Patrick Kelly Melissa Mascarin Gail Wise Email: [email protected] Editorial Assistant Printing Suzanne E. Moreau Canselmdc Email: [email protected] www.cansel.ca Production Manager The Royal Astronomical James Edgar Email: [email protected] Society of Canada The Journal of The Royal Astronomical Society of Canada is published at an annual subscription rate of $93.45 (including tax) by The Royal Astronomical Society of Canada. Membership, which includes the publications (for personal use), is open to anyone interested ToVision inspire curiosity in all people about the Universe, to in astronomy. Applications for subscriptions to the Journal or membership in the RASC and information on how to acquire back issues of the Journal can be obtained from: share scientific knowledge, and to foster collaboration in astronomical pursuits. The Royal Astronomical Society of Canada 203 – 4920 Dundas St W Toronto ON M9A 1B7, Canada Mission Email: [email protected] The Royal Astronomical Society of Canada (RASC) Web site: www.rasc.ca encourages improved understanding of astronomy Telephone: (416) 924-7973 Fax: (416) 924-2911 for all people, through education, outreach, research, publication, enjoyment, partnership, and community. Canadian Publications Mail Registration No. 09818 Canada Post: Send address changes to 203 – 4920 Dundas St W, Toronto ON M9A 1B7 Canada Post Publication Agreement No. 40069313 Values We acknowledge the financial support of the Government of Canada through the Canada The RASC has a proud heritage of excellence and Periodical Fund (CPF) for our publishing activities. integrity in its programs and partnerships. As a vital part of Canada’s science community, we support discovery through the scientific method. We inspire and encourage © 2013 The Royal Astronomical Society of Canada. All rights reserved. ISSN 0035-872X Cert no. SW-COC-005174 people of all ages to learn about and enjoy astronomy. 182 JRASC | Promoting Astronomy in Canada October / octobre 2013 an open competition for payload and science instruments to be carried by a rover similar to that of Curiosity, currently operating on Mars. Applying Curiosity’s design is expected to minimize mission costs, reduce risks, and attain mission objectives. The new rover configuration would feature a car-sized vehicle about 3 metres long, 2.7 metres wide, and 2.2 metres tall, not including an arm. Instruments on the new rover will permit visual, mineralogical, and chemical analysis down to microscopic scale. The aim is to understand the environment around the landing site and identify biosignatures or features in the rocks and soil that could have been formed biologically. Figure 1 — An artist’s concept shows a deep-blue exoplanet, HD 189733b, Looking for signs of past life is the next logical step, notes the orbiting its yellow-orange star, HD 189733. Image Credit: NASA, ESA, and Science Definition Team, as Curiosity recently confirmed that G. Bacon (STScI) past environmental conditions on Mars could have supported living microbes. The Science Definition Team has also proposed that the rover collect and package as many as 31 samples of Astronomers have concluded that the cobalt blue colour comes rock cores and soil for a later mission to bring back for more from a hazy, blow-torched atmosphere containing high clouds definitive analysis in laboratories on Earth. laced with silicate particles. Silicates condensing in the heat could form very small drops of glass that scatter blue light more Two Plutonian moons feature mythical names than red light. Pluto’s fourth and fifth moons are now officially called Report details 2020 Mission to Mars Kerberos and Styx.
Load more

Recommended publications
  • Navigating North America
    deep-sky wonders by sue french Navigating North America the north america nebula is one of the most impres- NGC 6997 is the most obvious cluster within the confines sive nebulae glowing in our sky. This nebula’s remarkable of the North America Nebula. To me, it looks as though it’s resemblance to the North American continent makes it bet- been plunked down on the border between Ohio and West ter known by its common name — bestowed not by a resi- Virginia. Putting 4.8-magnitude 57 Cygni at the western dent of North America, but by German astrono- edge of a low-power eyepiece field should bring NGC 6997 Knowing mer Max Wolf. In 1890 Wolf became the first into view. My 4.1-inch scope at 17× displays a dusting of person to photograph the North America Nebula, very faint stars. At 47×, it’s a pretty cluster, rich in faint your and for many years this remained the only way to stars, spanning 10′. Through my 10-inch reflector, I count geography fully appreciate its distinctive shape. With today’s 40 stars, mostly of magnitude 11 and 12. Many are abundance of short-focal-length telescopes and arranged in two incomplete circles, one inside the other. puts you wide-field eyepieces, we can more readily enjoy Is NGC 6997 actually involved in the North America one step this large nebula visually. Nebula? It’s difficult to tell because the distances are poorly The North America Nebula, NGC 7000 or Cald- known. A journal article earlier this year puts NGC 6997 at ahead in well 20, is certainly easy to locate.
    [Show full text]
  • A Campus Observatory Image of the North America Nebula
    The Observer A Campus Observatory Image of the North America Nebula by Fred Ringwald Fresno State’s Campus Observatory is convenient for students to use, but its sky rates 10 on the Bortle scale: “Most people don’t look up.” The faintest stars the unaided eye can see there are about 3rd magnitude. Nevertheless, its telescopes can get good images through an Hα (pronounced “H-alpha”) filter. An Hα filter passes only a narrow band of wavelengths that are centered on the Hα line, the scarlet wavelength at which hydrogen radiates the most light visible to the eye. City lights radiate mostly at other wavelengths, from mercury or sodium vapor in the lamps. Hydrogen is the most common element in nebulae, so Hα filters improve their image contrast. This image was taken through a 70-mm guidescope mounted piggyback on the Campus Observatory’s main telescope. The guidescope was made by Vixen. With a focal length of only 400 mm, the guidescope gets a wide field of view, which makes it easier for novice students to point the telescope. With the SBIG ST-9 camera used to take this image, the field of view is 1.5º on a side. It shows the southern end of NGC 7000, called “the North America Nebula” because of its shape. At upper right is “Florida,” bounded by a dust lane corresponding to the “Gulf of Mexico”; at bottom-center is “Mexico.” A bright shock front runs through the east side (on the left), which is called “the Great Wall,” incongruous since that’s in China! The North America Nebula is in the constellation Cygnus, 3º east of the 1st-magntude supergiant star Deneb.
    [Show full text]
  • Cubesat Data Analysis Revision
    371-XXXXX Revision - CubeSat Data Analysis Revision - November 2015 Prepared by: GSFC/Code 371 National Aeronautics and Goddard Space Flight Center Space Administration Greenbelt, Maryland 20771 371-XXXXX Revision - Signature Page Prepared by: ___________________ _____ Mark Kaminskiy Date Reliability Engineer ARES Corporation Accepted by: _______________________ _____ Nasir Kashem Date Reliability Lead NASA/GSFC Code 371 1 371-XXXXX Revision - DOCUMENT CHANGE RECORD REV DATE DESCRIPTION OF CHANGE LEVEL APPROVED - Baseline Release 2 371-XXXXX Revision - Table of Contents 1 Introduction 4 2 Statement of Work 5 3 Database 5 4 Distributions by Satellite Classes, Users, Mass, and Volume 7 4.1 Distribution by satellite classes 7 4.2 Distribution by satellite users 8 4.3 CubeSat Distribution by mass 8 4.4 CubeSat Distribution by volume 8 5 Annual Number of CubeSats Launched 9 6 Reliability Data Analysis 10 6.1 Introducing “Time to Event” variable 10 6.2 Probability of a Successful Launch 10 6.3 Estimation of Probability of Mission Success after Successful Launch. Kaplan-Meier Nonparametric Estimate and Weibull Distribution. 10 6.3.1 Kaplan-Meier Estimate 10 6.3.2 Weibull Distribution Estimation 11 6.4 Estimation of Probability of mission success after successful launch as a function of time and satellite mass using Weibull Regression 13 6.4.1 Weibull Regression 13 6.4.2 Data used for estimation of the model parameters 13 6.4.3 Comparison of the Kaplan-Meier estimates of the Reliability function and the estimates based on the Weibull regression 16 7 Conclusion 17 8 Acknowledgement 18 9 References 18 10 Appendix 19 Table of Figures Figure 4-1 CubeSats distribution by mass ....................................................................................................
    [Show full text]
  • The 2009 Mars Telecom Orbier Mission
    The 2009 Mars Telecom Orbiter Mission1,2 Stephen F. Franklina, John P. Slonski, Jr.a, Stuart Kerridgea, Gary Noreena, Joseph E. Riedela, Tom Komareka, Dorothy Stosica, Caroline Rachoa, Bernard Edwardsb, Don Borosonc a-Jet Propulsion Laboratory, California Institute of Technology; Pasadena, Ca. 91109; b-NASA Goddard Spaceflight Center, Greenbelt, Md. 20771 USA c-MIT-Lincoln Laboratory, Lexington, Ma, 02420 Abstract—This paper provides an overview of the Mars Mission and flight system requirements have been written. Telecom Orbiter (MTO) mission, and is an update to the The flight system requirements define the flight system paper presented at last year’s conference. Launched in performance and functionality to the competing system 2009, MTO will provide Mars-to-Earth relay services for contract proposers. NASA missions arriving at Mars between 2010 and 2020, enabling far higher science data return and lowering the A Rendezvous and Autonomous Navigation (RAN) telecom and operations costs for these missions. MTO demonstration has been added. An orbiting sample canister carries an optical communications payload, which will will be released and tracked by the ground using on-board demonstrate downlink bit rates from 1 Mbps up to and cameras. The spacecraft will then rendezvous with the possibly exceeding 30 Mbps. MTO will also demonstrate canister using its autonomous navigation capability, coming the ability to autonomously navigate, and to search for and to within ten meters of (but not capturing) the canister. This rendezvous with an orbiting sample, in preparation for operation demonstrates capabilities that the proposed NASA NASA’s proposed Mars Sample Return Mission. A to-be- Mars Sample Return orbiter will require to capture the Mars defined science instrument will also be carried.
    [Show full text]
  • Binocular Challenge Here
    AHSP Binocular Observing Award Compiled by Phil Harrington www.philharrington.net • To qualify for the BOA pin, you must see 15 of the following 20 binocular targets. Check off each as you spot them. Seen # Object Const. Type* RA Dec Mag Size Nickname 1. M13 Her GC 16 41.7 +36 28 5.9 16' Great Hercules Globular 2. M57 Lyr PN 18 53.6 +33 02 9.7 86"x62" Ring Nebula 3. Collinder 399 Vul AS 19 25.4 +20 11 3.6 60' Coathanger/Brocchi’s Cluster 3.1 4. Albireo Cyg Dbl 19 30.7 +27 57 35” Color Contrasting Double 5.1 5. M27 Vul PN 19 59.6 +22 43 8.1 8’x6’ Dumbbell Nebula 6. NGC 6992 Cyg SNR 20 56.4 +31 43 - 60'x8 Veil Nebula (east) 7. NGC 7000 Cyg BN 20 58.8 +44 20 - 120'x100' North America Nebula 8. M15 Peg GC 21 30.0 +12 10 7.5 12’ Great Pegasus Cluster 9. M39 Cyg OC 21 32.2 +48 26 4.6 32' 10. Barnard 168 Cyg DN 21 53.2 +47 12 - 100'x10' West of Cocoon Nebula 11. IC 5146 Cyg BN/OC 21 53.5 +47 16 - 12'x12' Cocoon Nebula 12. M110 And Gx 00 40.4 +41 41 10 17’x10’ 13. M32 And Gx 00 42.8 +40 52 10 8’x6’ 14. M31 And Gx 00 42.8 +41 16 4.5 178’ Andromeda Galaxy 15. NGC 457 Cas OC 01 19.1 +58 20 6.4 13’ Owl Cluster/ET Cluster 16.
    [Show full text]
  • A Basic Requirement for Studying the Heavens Is Determining Where In
    Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun­ damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short).
    [Show full text]
  • Sky & Telescope
    Eclipse from the See Sirius B: The Nearest Spot the Other EDGE OF SPACE p. 66 WHITE DWARF p. 30 BLUE PLANETS p. 50 THE ESSENTIAL GUIDE TO ASTRONOMY What Put the Bang in the Big Bang p. 22 Telescope Alignment Made Easy p. 64 Explore the Nearby Milky Way p. 32 How to Draw the Moon p. 54 OCTOBER 2013 Cosmic Gold Rush Racing to fi nd exploding stars p. 16 Visit SkyandTelescope.com Download Our Free SkyWeek App FC Oct2013_J.indd 1 8/2/13 2:47 PM “I can’t say when I’ve ever enjoyed owning anything more than my Tele Vue products.” — R.C, TX Tele Vue-76 Why Are Tele Vue Products So Good? Because We Aim to Please! For over 30-years we’ve created eyepieces and telescopes focusing on a singular target; deliver a cus- tomer experience “...even better than you imagined.” Eyepieces with wider, sharper fields of view so you see more at any power, Rich-field refractors with APO performance so you can enjoy Andromeda as well as Jupiter in all their splendor. Tele Vue products complement each other to pro- vide an observing experience as exquisite in performance as it is enjoyable and effortless. And how do we score with our valued customers? Judging by superlatives like: “in- credible, truly amazing, awesome, fantastic, beautiful, work of art, exceeded expectations by a mile, best quality available, WOW, outstanding, uncom- NP101 f/5.4 APO refractor promised, perfect, gorgeous” etc., BULLSEYE! See these superlatives in with 110° Ethos-SX eye- piece shown on their original warranty card context at TeleVue.com/comments.
    [Show full text]
  • Starttabelle 2013 2013-01A 2013-01B 2013-01C 2013-02A 2013-02B 2013-03A 2013-04A NOA-01 2013-05A 2013-05B 2013-05C 2013-05D 2013-05E 2013-05F 2013-06A 2013-06B
    Raumfahrer.net Starttabelle 2013 Bahnnähe Bahnferne Inklination LandLandLand bzw.bzw.bzw. WiederWieder---- COSPAR Satellit StartStartStart (GMT) Trägerrakete Startort Umläuft Bemerkungen Bemannt (km)(km)(km) (km)(km)(km) (Grad) Organisation eintritt 2013-01A Kosmos 2482 15.01.2013 Rokot Plesezk 1.484 1.523 82,504 Erde Russland - Militärischer Datenrelais- Nein (Strela-3M 4) 16.25 satellit 2013-01B Kosmos 2483 15.01.2013 Rokot Plesezk 1.485 1.510 82,505 Erde Russland - Militärischer Datenrelais- Nein (Strela-3M 5) 16.25 satellit 2013-01C Kosmos 2484 15.01.2013 Rokot Plesezk 1.484 1.523 82,504 Erde Russland - Militärischer Datenrelais- Nein (Strela-3M 6) 16.25 satellit 2013-02A IGS-Radar 4 27.01.2013 H2-A Tanegashima 480 500 97 Erde Japan - Radar-Aufklärungssatellit Nein 4.40 2013-02B IGS-Optik 5V 27.01.2013 H2-A Tanegashima 480 500 97 Erde Japan - Optischer Aufklärungs- Nein 4.40 satellit 2013-03A STSat 2C 30.01.2013 Naro 1 Naro-Raumfahrt- 304 1.509 80,275 Erde Südkorea - Forschungs- und Technolo- Nein 7.00 zentrum giesatellit; ca. 100 kg 2013-04A TDRS K 31.01.2013 Atlas 5 Cape Canaveral 35.744 35.845 6,998 Erde USA - Bahnverfolgungs- und Nein 1.48 Datenrelaissatellit; 3.454 kg NOA-01 Intelsat 27 01.02.2013 Zenit 3 Sea-Launch-Plattform - - - - USA - Fehlfunktion der ersten Nein 7.56 Stufe und Absturz 2013-05A Globalstar M78 06.02.3013 Sojus 2 Baikonur 1.420 1.421 52,004 Erde USA - Sprach- und Datenkommu- Nein 16.04 nikationssatellit; 700 kg 2013-05B Globalstar M93 06.02.3013 Sojus 2 Baikonur 1.420 1.421 51,980 Erde USA - Sprach- und Datenkommu-
    [Show full text]
  • Changes to the Database Document
    Additions and Deletions for the 12-1-18 Release This version of the Database includes launches through November 30, 2018. There are currently 1,957 active satellites in the database. The changes to this version of the database include: • The addition of 141satellites • The deletion of 71 satellites • The addition of and corrections to some satellite data Satellites Removed Echostar-1 – 1995-073A Palapa C2 -- 1996-030A Measat-2 – 1996-063B Iridium 12 – 1997-030B Iridium 10 – 1997-030D Iridium 15 – 1997-034A Iridium 18 -- 1997-034D ABS-3 -- 1997-042A Iridium 25 – 1997-043B Iridium 37 – 1997-056D Iridium 41 – 1997-069B JCSat-1B – 1997-075A Iridium 47 – 1997-082C Globalstar FM4 – 1998-008B Iridium 52 – 1998-010A Iridium 56 – 1998-010B Iridium 50 – 1998-010D Iridium 53 – 1998-010E Iridium 62 -- 1998-021A Iridium 65 – 1998-021D Iridium 66 – 1998-021E Iridium 67 – 1998-021F Iridium 68 – 1998-021G Iridium 72 – 1998-032B Iridium 75 – 1998-032E Iridium 76 – 1998-048B Iridium 81 – 1998-051B Iridium 80 – 1998-051C Iridium 86 – 1998-066B Iridium 84 – 1998-066D Iridium 83 – 1998-066E Dove 2e-1 – 1998-067JD Dove 2e-5 – 1998-067JN Dove 2ep-5 – 1998-067JR Dove 2ep-14 – 1998-067KJ Dove 2ep-15 – 1998-067KL Dove 2ep-17 – 1998-067KN Dove 2ep-18 – 1998-067KM Dove 23p-20 – 1998-067KP Dove 2ep-19 – 1998-067KQ Lemur-2F20 -- 1998-067LD i-INSPIRE-2 – 1998-067ML Tomsk-TPU-120 -- 1998-067MZ Tanyusha 1 -- 1998-067NA Tanyusha 2 -- 1998-067NB TNS-0-2 Nanosputnik -- 1998-067ND SIMPL – 1998-067NF Iridium 20A – 1998-074A Iridium 11A – 1998-074B Globalstar M023 – 1999-004A
    [Show full text]
  • A Compendium of Distances to Molecular Clouds in the Star Formation Handbook?,?? Catherine Zucker1, Joshua S
    A&A 633, A51 (2020) Astronomy https://doi.org/10.1051/0004-6361/201936145 & c ESO 2020 Astrophysics A compendium of distances to molecular clouds in the Star Formation Handbook?,?? Catherine Zucker1, Joshua S. Speagle1, Edward F. Schlafly2, Gregory M. Green3, Douglas P. Finkbeiner1, Alyssa Goodman1,5, and João Alves4,5 1 Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA e-mail: [email protected], [email protected] 2 Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA 3 Kavli Institute for Particle Astrophysics and Cosmology, Physics and Astrophysics Building, 452 Lomita Mall, Stanford, CA 94305, USA 4 University of Vienna, Department of Astrophysics, Türkenschanzstraße 17, 1180 Vienna, Austria 5 Radcliffe Institute for Advanced Study, Harvard University, 10 Garden St, Cambridge, MA 02138, USA Received 21 June 2019 / Accepted 12 August 2019 ABSTRACT Accurate distances to local molecular clouds are critical for understanding the star and planet formation process, yet distance mea- surements are often obtained inhomogeneously on a cloud-by-cloud basis. We have recently developed a method that combines stellar photometric data with Gaia DR2 parallax measurements in a Bayesian framework to infer the distances of nearby dust clouds to a typical accuracy of ∼5%. After refining the technique to target lower latitudes and incorporating deep optical data from DECam in the southern Galactic plane, we have derived a catalog of distances to molecular clouds in Reipurth (2008, Star Formation Handbook, Vols. I and II) which contains a large fraction of the molecular material in the solar neighborhood. Comparison with distances derived from maser parallax measurements towards the same clouds shows our method produces consistent distances with .10% scatter for clouds across our entire distance spectrum (150 pc−2.5 kpc).
    [Show full text]
  • Binocular Observing Olympics Stellafane 2018
    Binocular Observing Olympics Stellafane 2018 Compiled by Phil Harrington www.philharrington.net • To qualify for the BOO pin, you must see 15 of the following 20 binocular targets. Check off each as you spot them. Seen # Object Const. Type* RA Dec Mag Size Nickname 1. M4 Sco GC 16 23.6 -26 32 6.0 26' Cat’s Eye Globular 2. M13 Her GC 16 41.7 +36 28 5.9 16' Great Hercules Globular 3. M6 Sco OC 17 40.1 -32 13 4.2 15' Butterfly Cluster 4. IC 4665 Oph OC 17 46.3 +05 43 4.2 41' Summer Beehive 5. M7 Sco OC 17 53.9 -34 49 3.3 80' Ptolemy’s Cluster 6. M20 Sgr BN/OC 18 02.6 -23 02 8.5 29'x27' Trifid Nebula 7. M8 Sgr BN/OC 18 03.8 -24 23 5.8 90'x40' Lagoon Nebula 8. M17 Sgr BN 18 20.8 -16 11 7 46'x37' Swan or Omega Nebula 9. M22 Sgr GC 18 36.4 -23 54 5.1 24' Great Sagittarius Cluster 10. M11 Sct OC 18 51.1 -06 16 5.8 14' Wild Duck Cluster 11. M57 Lyr PN 18 53.6 +33 02 9.7 70"x150" Ring Nebula 12. Collinder 399 Vul AS 19 25.4 +20 11 3.6 60' Coathanger/Brocchi’s Cluster 13. PK 64+5.1 Cyg PN 19 34.8 +30 31 9.6p 8" Campbell's Hydrogen Star 14. M27 Vul PN 19 59.6 +22 43 8.1 8’x6’ Dumbbell Nebula 15.
    [Show full text]
  • In This Issue
    Vol. 39 No.3, December 2013 Editor: Jos Heyman FBIS In this issue: Satellite Update 3 Cancelled Projects: SLOMAR 4 News Artemis 2 Baikonour 3 Chang'e-3 6 Cygnus-2 3 Dnepr 1 9 Dreamchaser 6 DX-1 11 EDRS-C 2 FUEGO 6 GSat-15 3 GSat-16 3 Hylas 2 Made in Russia 7 Minotaur 1 7 O3b 6 OASIS 4 Phoenix 7 Planck 3 SkySat-1 and -2 2 Tiangong-4 11 Vega 7 VEX 3 OASIS Node-1 (courtesy Space Times) TIROS SPACE INFORMATION SkySat-1 and -2 86 Barnevelder Bend, Southern River WA 6110, Australia Tel + 61 8 9398 1322 (e-mail: [email protected]) The Tiros Space Information (TSI) - News Bulletin is published to promote the scientific exploration and commercial application of space through the dissemination of current news and historical facts. In doing so, Tiros Space Information continues the traditions of the Western Australian Branch of the Astronautical Society of Australia (1973-1975) and the Astronautical Society of Western Australia (ASWA) (1975-2006). The News Bulletin can be received worldwide by e-mail subscription only. Subscriptions can be requested by sending an e-mail address to [email protected]. Tiros Space Information reserves the right to refuse any subscription request without the need to provide a reason. All opinions expressed are those of the authors and do not necessarily reflect the opinions of the Editor or Tiros Space Information. All material contained in this publication may be reproduced provided due acknowledgment is made. Calling card... In a recent article that I drafted for the on-line Sat Magazine, I predicted that by the end of this calendar year a total of 192 satellites were to have been launched, the highest ever for a single year since spaceflight began in 1957.
    [Show full text]