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The Comet's Tale
THE COMET’S TALE Newsletter of the Comet Section of the British Astronomical Association Volume 5, No 1 (Issue 9), 1998 May A May Day in February! Comet Section Meeting, Institute of Astronomy, Cambridge, 1998 February 14 The day started early for me, or attention and there were displays to correct Guide Star magnitudes perhaps I should say the previous of the latest comet light curves in the same field. If you haven’t day finished late as I was up till and photographs of comet Hale- got access to this catalogue then nearly 3am. This wasn’t because Bopp taken by Michael Hendrie you can always give a field sketch the sky was clear or a Valentine’s and Glynn Marsh. showing the stars you have used Ball, but because I’d been reffing in the magnitude estimate and I an ice hockey match at The formal session started after will make the reduction. From Peterborough! Despite this I was lunch, and I opened the talks with these magnitude estimates I can at the IOA to welcome the first some comments on visual build up a light curve which arrivals and to get things set up observation. Detailed instructions shows the variation in activity for the day, which was more are given in the Section guide, so between different comets. Hale- reminiscent of May than here I concentrated on what is Bopp has demonstrated that February. The University now done with the observations and comets can stray up to a offers an undergraduate why it is important to be accurate magnitude from the mean curve, astronomy course and lectures are and objective when making them. -
Ice& Stone 2020
Ice & Stone 2020 WEEK 51: DECEMBER 13-19 Presented by The Earthrise Institute # 51 Authored by Alan Hale COMET OF THE WEEK: The Great Comet of 1680 Perihelion: 1680 December 18.49, q = 0.006 AU The Great Comet of 1680 over Rotterdam in The Netherlands, during late December 1680 as painted by the Dutch artist Lieve Verschuier. This particular comet was undoubtedly one of the brightest comets of the 17th Century, but it is also one of the most important comets in history from a scientific perspective, and perhaps even from the perspective of overall human history. While there were certainly plenty of superstitions attached to the comet’s appearance, the scientific investigations made of it were among the beginnings of the era in European history we now call The Enlightenment, and indeed, in a sense the Great Comet of 1680 can perhaps be considered as one of the sparks of that era. The significance began with the comet’s discovery, which was made on the morning of November 14, 1680, by a German astronomer residing in Coburg, Gottfried Kirch – the first comet ever to be discovered by means of a telescope. It was already around 4th magnitude at that time, and located near the star Regulus in the constellation Leo; from that point it traveled eastward and brightened rapidly, being closest to Earth (0.42 AU) on November 30. By that time it was a conspicuous naked-eye object with a tail 20 to 30 degrees long, and it remained visible for another week before disappearing into morning twilight. -
Prime Focus Page 2 August 2020 the Third Time Is Indeed the Charm
Highlights of the August Sky - - - 1st - - - DAWN: Venus and Zeta (ζ) Tauri are less than 2° apart. DUSK: A waxing gibbous Moon, Jupiter, and Saturn form a triangle. - - - 3rd - - - Full Moon 11:59 am EDT KAS - - - 9th - - - AM: Mars and a waning gibbous Moon are 1° apart. Perseid Potluck Picnic: Saturday, August 8 @ 6:00 pm - - - 11th - - - Last Quarter Moon ― Canceled Due to the Coronavirus Pandemic ― 12:45 pm EDT PM: Perseid Meteor Shower Member Observing: Saturday, August 8 @ 9:00 pm peaks. Jupiter, Saturn & The Summer Triangle • See Page 13 for Details th - - - 13 - - - AM: A waning crescent Moon and Aldebaran are Training Session: August 14, 21 & 28 @ 8:00 pm less than 4° apart. Owl Observatory • See Page 14 for Details and to Register th - - - 15 - - - DAWN: A slender waning crescent Moon is 3.5° to the Member Observing: Saturday, August 22 @ 9:00 pm upper le of Venus. Jupiter, Saturn & Summer Nebulae • See Page 13 for Details - - - 18th - - - New Moon 10:42 pm EDT - - - 22nd - - - Inside the Newsletter. DUSK: A waxing crescent Moon is over 5° to Spica’s upper right. Board Meeng Minutes..................... p. 2 - - - 25th - - - Observaons of NEOWISE................. p. 3 First Quarter Moon 1:58 pm EDT Member NEOWISE Images................ p. 4 DUSK: The Moon is 6° to the KAS Member Observatories...............p. 7 upper right of Antares. Stellar Walkabout.............................. p. 8 th - - - 27 - - - NASA Night Sky Notes........................ p. 10 DUSK: The Moon, Jupiter, and Saturn form a line. Membership of the KAS..................... p. 11 - - - 28th - - - August Night Sky................................ p. 12 DUSK: A gibbous Moon and Jupiter are separated by 2°. -
JRASC August 2021 Lo-Res
The Journal of The Royal Astronomical Society of Canada PROMOTING ASTRONOMY IN CANADA August/août 2021 Volume/volume 115 Le Journal de la Société royale d’astronomie du Canada Number/numéro 4 [809] Inside this issue: A Pas de Deux with Aurora and Steve Detection Threshold of Noctilucent Clouds The Sun, Moon, Waves, and Cityscape The Best of Monochrome Colour Special colour edition. This great series of images was taken by Raymond Kwong from his balcony in Toronto. He used a Canon EOS 500D, with a Sigma 70–300 ƒ/4–5.6 Macro Super lens (shot at 300 mm), a Kenko Teleplus HD 2× DGX teleconverter and a Thousand Oaks solar filter. The series of photos was shot at ISO 100, 0.1s, 600 mm at ƒ/11. August/ août 2021 | Vol. 115, No. 4 | Whole Number 809 contents / table des matières Feature Articles / Articles de fond 182 Binary Universe: Watch the Planets Wheel Overhead 152 A Pas de Deux with Aurora and Steve by Blake Nancarrow by Jay and Judy Anderson 184 Dish on the Cosmos: FYSTing on a 160 Detection Threshold of Noctilucent Clouds New Opportunity and its Effect on Season Sighting Totals by Erik Rosolowsky by Mark Zalcik 186 John Percy’s Universe: Everything Spins 166 Pen and Pixel: June 10 Partial Eclipse (all) by John R. Percy by Nicole Mortillaro / Allendria Brunjes / Shelly Jackson / Randy Attwood Departments / Départements Columns / Rubriques 146 President’s Corner by Robyn Foret 168 Your Monthly Guide to Variable Stars by Jim Fox, AAVSO 147 News Notes / En manchettes Compiled by Jay Anderson 170 Skyward: Faint Fuzzies and Gravity by David Levy 159 Great Images by Michael Gatto 172 Astronomical Art & Artifact: Exploring the History of Colonialism and Astronomy in 188 Astrocryptic and Previous Answers Canada II: The Cases of the Slave-Owning by Curt Nason Astronomer and the Black Astronomer Knighted by Queen Victoria iii Great Images by Randall Rosenfeld by Carl Jorgensen 179 CFHT Chronicles: Times They Are A-Changing by Mary Beth Laychak Bleary-eyed astronomers across most of the country woke up early to catch what they could of the June 10 annular eclipse. -
Colours of Minor Bodies in the Outer Solar System II - a Statistical Analysis, Revisited
Astronomy & Astrophysics manuscript no. MBOSS2 c ESO 2012 April 26, 2012 Colours of Minor Bodies in the Outer Solar System II - A Statistical Analysis, Revisited O. R. Hainaut1, H. Boehnhardt2, and S. Protopapa3 1 European Southern Observatory (ESO), Karl Schwarzschild Straße, 85 748 Garching bei M¨unchen, Germany e-mail: [email protected] 2 Max-Planck-Institut f¨ur Sonnensystemforschung, Max-Planck Straße 2, 37 191 Katlenburg- Lindau, Germany 3 Department of Astronomy, University of Maryland, College Park, MD 20 742-2421, USA Received —; accepted — ABSTRACT We present an update of the visible and near-infrared colour database of Minor Bodies in the outer Solar System (MBOSSes), now including over 2000 measurement epochs of 555 objects, extracted from 100 articles. The list is fairly complete as of December 2011. The database is now large enough that dataset with a high dispersion can be safely identified and rejected from the analysis. The method used is safe for individual outliers. Most of the rejected papers were from the early days of MBOSS photometry. The individual measurements were combined so not to include possible rotational artefacts. The spectral gradient over the visible range is derived from the colours, as well as the R absolute magnitude M(1, 1). The average colours, absolute magnitude, spectral gradient are listed for each object, as well as their physico-dynamical classes using a classification adapted from Gladman et al., 2008. Colour-colour diagrams, histograms and various other plots are presented to illustrate and in- vestigate class characteristics and trends with other parameters, whose significance are evaluated using standard statistical tests. -
Ensemble Properties of Comets in the Sloan Digital Sky Survey ⇑ Michael Solontoi A, ,Zˇeljko Ivezic´ B, Mario Juric´ C, Andrew C
Icarus 218 (2012) 571–584 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus Ensemble properties of comets in the Sloan Digital Sky Survey ⇑ Michael Solontoi a, ,Zˇeljko Ivezic´ b, Mario Juric´ c, Andrew C. Becker b, Lynne Jones b, Andrew A. West e, Steve Kent f, Robert H. Lupton d, Mark Claire b, Gillian R. Knapp d, Tom Quinn b, James E. Gunn d, Donald P. Schneider g a Adler Planetarium, 1300 S. Lake Shore Drive, Chicago, IL 60605, USA b University of Washington, Dept. of Astronomy, Box 351580, Seattle, WA 98195, USA c Harvard College Observatory, Cambridge, MA 02138, USA d Princeton University Observatory, Princeton, NJ 08544, USA e Department of Astronomy, Boston University, 725 Commonwealth Ave., Boston, MA 02215, USA f Fermi National Accelerator Laboratory, Batavia, IL 60510, USA g Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA article info abstract Article history: We present the ensemble properties of 31 comets (27 resolved and 4 unresolved) observed by the Sloan Received 17 May 2011 Digital Sky Survey (SDSS). This sample of comets represents about 1 comet per 10 million SDSS photo- Revised 25 September 2011 metric objects. Five-band (u,g,r,i,z) photometry is used to determine the comets’ colors, sizes, surface Accepted 17 October 2011 brightness profiles, and rates of dust production in terms of the Afq formalism. We find that the cumu- Available online 9 December 2011 lative luminosity function for the Jupiter Family Comets in our sample is well fit by a power law of the form N(<H) / 10(0.49±0.05)H for H < 18, with evidence of a much shallower fit N(<H) / 10(0.19±0.03)H for Keywords: the faint (14.5 < H < 18) comets. -
Hered in These Proceedings with the Aim to Keep Track of These Very Interesting Days
Proceedings of GAIA-FUN-SSO 2014 Third “Gaia Follow-up Network for Solar System Objects” Workshop held at IMCCE/Paris Observatory 2014, November 24 – 26 Institut de mécanique céleste et de calcul des éphémérides Observatoire de Paris Legal Deposite – June 2015 ISBN 2-910015-73-4 Foreword The observation of Solar System Objects (SSO) by the Gaia space astrometry mission will be constrained by a scanning law. Much detection of interesting objects may occur with no possibility of further observations by the probe. These objects will then require complementary ground-based observations. Among them, previously unknown Near- Earth Objects, fast moving towards the Earth or going away from it could be found. Several objects discovered by Gaia could also be Inner-Earth Objects, as the probe will observe at rather low Solar elongations. In order to confirm from the ground the discoveries made in space and to follow interesting targets, a dedicated network is organized, the Gaia Follow-Up Network. This task is performed in the frame of the Coordination Unit 4 of the Gaia Data Processing and Analysis Consortium (DPAC), devoted to data processing of specific objects. The goal of the network is to improve the knowledge of the orbit of poorly observed targets by astrometric observations on alert. This activity is coordinated by a central node interacting with the Gaia data reduction pipeline all along the mission. In 2010 and 2012, we had organized the first two workshops in order to initiate the network and to meet the participants. In 2014, almost one year after the launch of Gaia, we organize the third Gaia-FUN-SSO workshop in Paris in order to discuss further the coordination of the network of observing stations, to discuss the prelaunch training observations which have been performed and to prepare the network for the operating phase of the alert mode which must begin in 2015. -
LARGE-GRAINED DUST in the COMA of 174P/ECHECLUS. J. M. Bauer1, Y-J
Science of Solar System Ices (2008) 9061.pdf LARGE-GRAINED DUST IN THE COMA OF 174P/ECHECLUS. J. M. Bauer1, Y-J. Choi1,5, P. R. Weiss- man1, J. A. Stansberry2, Y. R. Fernández3, H. G. Roe4, B. J. Buratti1, and H-I. Sung5, 1Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS 183-501, Pasadena, CA, USA 91109 (correspon- dence: [email protected]), 2 University of Arizona, Steward Observatory, 933 N. Cherry Ave., Tuscon AZ 85721, 3 University of Central Florida, Dept. of Physics, P.O. Box 162385, Orlando, FL 32816-2385, 4 Lowell Ob- servatory, 1400 W. Mars Hill Road, Flagstaff, AZ 86001, 5Korea Astronomy and Space Science Institute 61-1 Hwaam-dong, Yuseong-gu, Daejon 305-348, South Korea. Introduction: On December 30, 2005, Choi and Advanced Technology Telescope, the Bohyunsan Op- Weissman[1] discovered that the formerly dormant tical Astronomy Observatory(BOAO) 1.8-m telescope, Centaur 2000 EC98 was in strong outburst. Previous and Table Mountain Observatory's 0.6-m telescope, observations spanning a 3-year period indicated a lack revealing a coma morphology nearly identical to the of coma down to the 27 mag/sq. arcsec level[2]. We mid-IR observations. Dust production estimates rang- present Spitzer Space Telescope MIPS observations of ing from 1.7-4.2 × 102 kg/s are on the order of 30 times this newly active Centaur - now known as that seen in other Centaurs, assuming grain densities 174P/Echeclus (2000 EC98) or 60558 Echeclus - taken onteh order of water-ice. in late February 2006, and the final results of their Discussion: Combined ground-based and SST pho- analyses[3]. -
Schweifsternen Des Letzten Quartals Mehr Als Zufrieden
Mitteilungsblatt der Heft 173 (34. Jahrgang) ISSN (Online) 2511-1043 Februar 2018 Komet C/2016 R2 (PanSTARRS) am 10. Januar 2018 um 20:26 UT mit einem 12“ f/3,6 ASA Astrograph, RGB 32/12/12 Minuten belichtet mit einer FLI PL16200 CCD-Kamera, Gerald Rhemann Liebe Kometenfreunde, wann gibt es wieder einen hellen Kometen? Fragt man hin und wieder im Internet. Ich dagegen vermisse nichts und bin mit den Schweifsternen des letzten Quartals mehr als zufrieden. Herausheben möchte ich die Schweifdynamik, welche der Komet C/2016 R2 (PanSTARRS) hervorbringt (siehe Titelfoto): Sie wurde von einigen von uns fotografiert, die raschen Veränderungen im Schweif erinnerte nicht nur mich an eine sich drehende Qualle. Michael Jäger und ich werden darüber im VdS-Journal berichten. Viel eindrucksvoller als die dort abgedruckten Fotos sind aber die kleinen Videofilme, die man in unserer Bildergalerie findet. Visuell war davon praktisch nichts zu sehen. Nur in Instrumenten der Halbmeterklasse war überhaupt etwas vom Schweif erkennbar, in meinem 12-Zöller sah ich nur die Koma. Für mich ist dies ein plastischer Nachweis, wie sehr sich die Kometenfotografie entwickelt hat. Einen klaren Himmel wünscht Euer Uwe Pilz. Liebe Leser des Schweifsterns, Die vorliegende Ausgabe des Schweifsterns deckt die Aktivitäten der Fachgruppe Kometen der VdS im Zeitraum vom 01.11.2017 bis zum 31.01.2018 ab. Berücksichtigt wurden alle bis zum Stichtag be- reitgestellten Fotos, Daten und Beiträge (siehe Impressum am Ende des Schweifsterns). Für die einzelnen Kometen lassen sich die Ephemeriden der Kometen auf der Internet-Seite http://www.minorplanetcenter.org/iau/MPEph/MPEph.html errechnen. -
Kometen Im Visier Rosetta Eröffnet Eine Neue Ära Der Kometen-Astronomie
interstellarum THEMA | 1/2014 fokussiert Titelbild: Während ISON kläglich an der Sonne scheiterte, stieß C/2013 R1 Lovejoy in die Lücke. Das Foto zeigt ihn am 12.12.2013. CCD-Aufnahme, 5:14 MEZ, 8"-Astrograph bei 560mm, FLI PL 16070, 5min (je LRGB). Gerald Rhemann INTERAKTIV Auf Twitter informieren wir Sie tagesaktuell über astronomische Ereignisse und geben Updates. Folgen Sie @interstellarum! Kurzlink: oclm.de/twt BUCHTIPP Liebe Leserinnen, liebe Leser, Atlas der Großen Kometen eigentlich war alles ganz anders geplant: Dieses Themenheft sollte eine imposante Rückschau auf den Jahrhundert-Auftritt des Kometen ISON werden; mit Ihren Fotos, viel Hintergrundinformation und Begeisterung. Leider ist bekanntlich alles ganz anders gekommen. Komet ISON kommt in diesem Heft nun nur noch am Rande vor: Daniel Fischer fasst die bisherigen Kenntnisse über das Scheitern in seiner Analyse zusammen (S. 24). Stefan Binnewies und Rainer Sparenberg berichten von der vergeblichen Suche nach ISON auf La Palma (S. 64). Dennoch: Das Kometenjahr 2013 war besser als sein Ruf. Das zeigt der ausführliche Rückblick von Burkhard Leitner mit beeindruckenden Fotos der Kometen-Fotoexperten Gerald Rhemann und Waldemar Skorupa (S. 30). Ronald Stoyan, Oculum-Verlag, Im Fokus dieser Ausgabe stehen die spannenden Ereignisse, die im zweiten Halb- ISBN: 978-3-938469-70-5, jahr 2014 folgen werden: Mit Rosetta wird erstmals eine Raumsonde in den Orbit um 49,90€. einen Kometen einschwenken, und sogar ein Landemodul auf diesem absetzen. Was sich Forscher davon erhoffen, schildert Daniel Fischer in seiner Titelgeschichte (S. 8). Kometen- Kurzlink: oclm.de/03ac Astronom Harald Krüger gibt in seinem Artikel einen umfassenden Überblick über das heutige Wissen zu Schweifsternen vor Rosetta (S. -
174P/Echeclus and Its Blue Coma Observed Post-Outburst
174P/Echeclus and its Blue Coma Observed Post-Outburst Seccull, T., Fraser, W. C., Puzia, T. H., Fitzsimmons, A., & Cupani, G. (2019). 174P/Echeclus and its Blue Coma Observed Post-Outburst. Astronomical Journal, 157(2), [88]. https://doi.org/10.3847/1538-3881/aafbe4 Published in: Astronomical Journal Document Version: Publisher's PDF, also known as Version of record Queen's University Belfast - Research Portal: Link to publication record in Queen's University Belfast Research Portal Publisher rights © 2019 The Authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The Research Portal is Queen's institutional repository that provides access to Queen's research output. Every effort has been made to ensure that content in the Research Portal does not infringe any person's rights, or applicable UK laws. If you discover content in the Research Portal that you believe breaches copyright or violates any law, please contact [email protected]. Download date:02. Oct. 2021 The Astronomical Journal, 157:88 (11pp), 2019 February https://doi.org/10.3847/1538-3881/aafbe4 © 2019. The American Astronomical Society. 174P/Echeclus and Its Blue Coma Observed Post-outburst Tom Seccull1 , Wesley C. -
Near-Earth Object Resource
NEO Resource Near-Earth Object Resource Compiled and edited by James M. Thomas for the Museum Astronomical Resource Society http://marsastro.org and the NASA/JPL Solar System Ambassador Program http://www.jpl.nasa.gov/ambassador Updated July 15, 2006 Based upon material available through the NASA Near-Earth Object Program http://neo.jpl.nasa.gov/ 1 of 104 NEO Resource Table of Contents Section Page Introduction & Overview 5 Target Earth 6 • The Cretaceous/Tertiary (K-T) Extinction 9 • Chicxulub Crater 10 • Barringer Meteorite Crater 13 What Are Near-Earth Objects (NEOs)? 14 What Is The Purpose Of The Near-Earth Object Program? 14 How Many Near-Earth Objects Have Been Discovered So Far? 15 What Is A PHA? 16 What Are Asteroids And Comets? 17 What Are The Differences Between An Asteroid, Comet, Meteoroid, Meteor and 19 Meteorite? Why Study Asteroids? 21 Why Study Comets? 24 What Are Atens, Apollos and Amors? 27 NEO Groups 28 Near-Earth Objects And Life On Earth 29 Near-Earth Objects As Future Resources 31 Near-Earth Object Discovery Teams 32 2 of 104 NEO Resource • Lincoln Near-Earth Asteroid Research (LINEAR) 35 • Near-Earth Asteroid Tracking (NEAT) 37 • Spacewatch 39 • Lowell Observatory Near-Earth Object Search (LONEOS) 41 • Catalina Sky Surveys 42 • Japanese Spaceguard Association (JSGA) 44 • Asiago DLR Asteroid Survey (ADAS) 45 Spacecraft Missions to Comets and Asteroids 46 • Overview 46 • Mission Summaries 49 • Near-Earth Asteroid Rendezvous (NEAR) 49 • DEEP IMPACT 49 • DEEP SPACE 1 50 • STARDUST 50 • Hayabusa (MUSES-C) 51 • ROSETTA