Alvan Clark and His Sons
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The Comet's Tale, and Therefore the Object As a Whole Would the Section Director Nick James Highlighted Have a Low Surface Brightness
1 Diebold Schilling, Disaster in connection with two comets sighted in 1456, Lucerne Chronicle, 1513 (Wikimedia Commons) THE COMET’S TALE Comet Section – British Astronomical Association Journal – Number 38 2019 June britastro.org/comet Evolution of the comet C/2016 R2 (PANSTARRS) along a total of ten days on January 2018. Composition of pictures taken with a zoom lens from Teide Observatory in Canary Islands. J.J Chambó Bris 2 Table of Contents Contents Author Page 1 Director’s Welcome Nick James 3 Section Director 2 Melvyn Taylor’s Alex Pratt 6 Observations of Comet C/1995 01 (Hale-Bopp) 3 The Enigma of Neil Norman 9 Comet Encke 4 Setting up the David Swan 14 C*Hyperstar for Imaging Comets 5 Comet Software Owen Brazell 19 6 Pro-Am José Joaquín Chambó Bris 25 Astrophotography of Comets 7 Elizabeth Roemer: A Denis Buczynski 28 Consummate Comet Section Secretary Observer 8 Historical Cometary Amar A Sharma 37 Observations in India: Part 2 – Mughal Empire 16th and 17th Century 9 Dr Reginald Denis Buczynski 42 Waterfield and His Section Secretary Medals 10 Contacts 45 Picture Gallery Please note that copyright 46 of all images belongs with the Observer 3 1 From the Director – Nick James I hope you enjoy reading this issue of the We have had a couple of relatively bright Comet’s Tale. Many thanks to Janice but diffuse comets through the winter and McClean for editing this issue and to Denis there are plenty of images of Buczynski for soliciting contributions. 46P/Wirtanen and C/2018 Y1 (Iwamoto) Thanks also to the section committee for in our archive. -
12-Inch Alvan Clark Telescope Restoration
12-Inch Alvan Clark Telescope Restoration: Summary of Research and Final Recommendations Deborah Culmer and Hannah Johnson September, 2011 Introduction The first telescope installed at Lick Observatory was a second-hand purchase, with the telescope and its optic made by the premier telescope makers of the time, Alvan Clark and Sons of Cambridge, MA. The dome that housed it was the first structure built on Mt. Hamilton, from bricks fired in a kiln on location. That dome still stands; and until the 1970’s, the 12-inch refracting telescope was in operation, but without its original driver clock and gears (replaced with an electronic drive, perhaps in the 1950’s). Since it was decommissioned, the 12-inch has been in storage. The Lick Instrument Lab has retrieved it, and it is currently on location at UC Santa Cruz in anticipation of total restoration. In the summer of 2011, a research project was launched to determine to what era and condition the telescope should be restored. In recent years, there has been great interest in historical restoration of Alvan Clark telescopes (and others, to be sure). As a result of that interest, we had a pool of organizations and institutions from which to glean information. Two we visited in person; many more we contacted via email and conference calls. Based on our research and interviews, we offer our recommendations on the restoration of this historically important telescope. 1. Research In beginning this project, it was very important to understand the history of the 12-inch Alvan Clark, especially since it was the first telescope set up on Mt. -
The Professor Comet's Report Early Spring – April 2012
The Professor Comet’s Report 1 Mr. Justin J McCollum (BS, MS Physics) Lab Physics Coordinator Dept. of Physics Lamar University Welcome to the comet report which is a monthly article on the observations of comets by the amateur astronomy community and comet hunters from around the world! This C/2009 P1 Garradd with article is dedicated to the latest reports of available comets for Barred Spiral Galaxy NGC 4236 observations, current state of those comets, future 14 March 2011! predictions, & projections for observations in comet astronomy! Early Spring – April 2012 The Professor Comet’s Report 2 The Current Status of the Predominant Comets for Apr 2012! Comets Designation Orbital Magnitude Trend Observation Constellations Visibility (IAU – MPC) Status Visual (Range in (Night Sky Location) Period Lat.) Garradd 2009 P1 C 7.0* - 7.5 Fading 90°N – 30°S SW region of Ursa Major moving All Night SSW towards the SE region of Lynx. Giacobini - 21P P 9 – 10 Fading Poor N/A Zinner Elongation Lost in the daytime Glare! LINEAR 2011 F1 C 11 .7* Brightening 90°N – 20°S Undergoing retrograde motion All Night between Boötes and Draco thru the late Spring. Gehrels 2 78P P 12.2* Fading 60˚N - 20˚S Moving eastwards across Taurus Early Evening and progressing along the N edge of the Hyades Star Cluster! McNaught 2011 Q2 C 12.5 Fading 70˚N – Eqn. Currently in the S central region Early Morning of Andromeda moving NE between the boundary between Andromeda & Pisces. NEAT 246P/2010 V2 P 12.3* - 13 Possible 65˚N - 60˚S Undergoing retrograde motion All Night Steadiness in the E half of the N central region of Virgo until late June. -
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. -
Secular Light Curves of Comets, II: 133P
1 C:\Atlas2\133Pv9.doc\060704 / Version 9.0 Icarus MS Number I09469 Accepted for publication in Icarus, 2006 07 21 “Secular Light Curves of Comets, II: 133P/Elst-Pizarro, an Asteroidal Belt Comet” Ignacio Ferrín, Center for Fundamental Physics, University of the Andes, Mérida, VENEZUELA. [email protected] Received October11th, 2005 , Accepted July 21st, 2006 No. Of Pages 44 No. Of Figures 10 No. Of Tables 5 No. Of References 163 - The observations described in this work were carried out at the National Observatory of Venezuela (ONV), managed by the Center for Research in Astronomy (CIDA), for the Ministry of Science and Technology. 2 Proposed Running Head: “ Secular Light Curve of Comet 133P/Elst-Pizarro “ Name and address for Editorial Correspondence: Dr. Ignacio Ferrín, Apartado 700, Mérida 5101-A, VENEZUELA South America Email address: [email protected] 3 Abstract We present the secular light curve (SLC) of 133P/Elst-Pizarro, and show ample and sufficient evidence to conclude that it is evolving into a dormant phase. The SLC provides a great deal of information to characterize the object, the most important being that it exhibits outburst-like activity without a corresponding detectable coma. 133P will return to perihelion in July of 2007 when some of our findings may be corroborated. The most significant findings of this investigation are: (1) We have compiled from 127 literature references, extensive databases of visual colors (37 comets), rotational periods and peak-to-valley amplitudes (64 comets). 2-Dimensional plots are created from these databases, which show that comets do not lie on a linear trend but in well defined areas of these phase spaces. -
Ice & Stone 2020
Ice & Stone 2020 WEEK 21: MAY 17-23 Presented by The Earthrise Institute # 21 Authored by Alan Hale This week in history MAY 17 18 19 20 21 22 23 MAY 17, 1882: Observers in the path of a total solar eclipse that crossed central Egypt see and photograph a bright comet during totality. Comet Tewfik X/1882 K1, which was never seen again, was an apparent Kreutz sungrazer, and is this week’s “Comet of the Week.” Solar eclipse comets, in general, are the subject of this week’s “Special Topics” presentation. MAY 17 18 19 20 21 22 23 MAY 18, 44 B.C.: Astronomers in China first record seeing a bright comet, which was also later seen from Europe. The comet’s appearance shortly after the assassination of Julius Caesar has caused it to become generally known as “Caesar’s Comet” and it is next week’s “Comet of the Week.” MAY 18, 1970: Australian amateur astronomer Graeme White discovers a bright comet deep in evening twilight. Over the next several nights several other independent discoveries of this comet were made, including by Air France pilot Emilio Ortiz and by Carlos Bolelli at Cerro Tololo Inter-American Observatory in Chile. Comet White-Ortiz-Bolelli 1970f was the last bright Kreutz sungrazer to be observed from the ground until 2011. Kreutz sungrazers are the subject of a future “Special Topics” presentation. MAY 17 18 19 20 21 22 23 MAY 20, 1910: Comet 1P/Halley passes 0.151 AU from Earth, transiting the sun in the process (which was not detected) and briefly creating the longest apparent cometary tail ever observed. -
FOR IMMEDIATE RELEASE September 2006 New Documents
FOR IMMEDIATE RELEASE September 2006 New Documents Published in Special Issue of Journal of the Antique Telescope Society Reveal Unknown Aspects of Early Career of Major American Telescope-Maker Alvan Clark More than two dozen documents previously unknown to historians shed new light on the early struggles of the nineteenth-century American telescope-maker Alvan Clark to establish his reputation for his astronomical expertise and optical skill. The documents, ranging from manuscript letters and notes to letters to newspaper editors—have been made public for the first time in the Summer/Fall 2006 issue of the Journal of the Antique Telescope Society, published this month as a single-topic double-length issue devoted to Clark’s early telescope-making efforts. “This special Alvan Clark issue of the Journal of the Antique Telescope Society is the most significant publica- tion of new material about Alvan Clark since 1995,” declared the Antique Telescope Society’s president, Dr. Mi- chael Reynolds, F.R.A.S., associate dean of mathematics and natural sciences and professor of astronomy at Florida Community College in Jacksonville, and executive director emeritus of the Chabot Space and Science Center in Oakland, California. (In 1995, Deborah Jean Warner and Robert B. Ariail published their now-classic biography and catalogue Alvan Clark & Sons: Artists in Optics [second edition, Richmond, Va.: Willmann–Bell, in association with the National Museum of American History, Smithsonian Institution].) Alvan Clark (1804-1887) was the United States’s -
Historyofthetelescope
HISTORY OF THE TELESCOPE Pedro Ré http://pedroreastrophotography.com/ Contents Joseph von Fraunhofer (1787 - 1826) and the Great Dorpat refractor .................................................. 3 Alvan Clark (1804-1887), George Bassett Clark (1827-1891) and Alvan Graham Clark (1832-1897): American makers of telescope optics. .................................................................................................. 13 William Parsons (1800-1867) e o Leviatã de Parsonstown (in Portuguese) ......................................... 21 O Telescópio de Craig (1852) (in Portuguese) ...................................................................................... 29 The 25-inch Newall Refractor ............................................................................................................... 37 The Kew Photoheliograph ..................................................................................................................... 43 O Grande Telescópio de Melbourne (in Portuguese) ........................................................................... 51 O Grande Refractor da Exposição de Paris (1900) (in Portuguese) ...................................................... 61 William Lassell’s (1799-1880) Telescopes and the discovery of Triton ................................................ 71 James Nasmyth’s (1808-1890) telescopes ............................................................................................ 77 The 36-inch Crosley Reflector .............................................................................................................. -
Comet ISON! (Comet of the Century?)
1 Mr. Justin J McCollum (BS, MS Physics) Lab Physics Coordinator Dept. of Physics Lamar University 2 Table of Contents ISON network………………..….………………….…...3 – 6 C/2012 S1 Discoverers………….…...……….…...…7 – 10 CoLiTech System…………………….……….….………...11 Discovery & Prediscovery……………….…….………...12 Early Orbital Analysis…………………….……….…….…13 Speculations of Comet ISON…………..…………14 - 15 Oort or Oort – Opik Cloud………….……........16 – 17 Origin of Comet ISON……….………………….……….18 Sungrazer Comets…………………………………….19 - 20 Evolution of Comet ISON………………………………21 Facts about Comet ISON…………………....…..22 – 23 ISON a Pristine Comet?...............................24 – 25 Photometry & Current Brightness……………..26 – 27 Nature and State of the Coma…………………..28 – 30 Central Nucleus of Comet ISON………………31 – 32 Nucleus to the Tail……………………………….…..……33 Nature & State of the Tail…………………………34 – 35 Future & Expectations………………………….....36 – 39 Getting to know more about Comets!...........40 – 46 After Perihelion Passage!..............................47 – 49 Catching the Comet in December!…………….50 – 53 ISON in the Daytime…….…………………………….…54 NASA Involvement!.............................................55 C/2012 S1 Orbital Structure………………..…………..56 Ephemeris Terminology………………………………...57 Data Spreadsheet Introduction………………………..58 Data Table Spreadsheets…………………………..59 - 60 Comet ISON Updates………………………………61 - 62 Knowing where & how to find ISON……...…63 – 64 Current ISON Observing Campaign………….65 – 66 Comet ISON photo contest…………………………….67 End Page……………………………………………………...68 3 Imperial Academy of -
A Great Comet Coming? Comet ISON May Grow Into a Truly Incredible Sight
OBSERVING Exploring the Solar System John E. Bortle A Great Comet Coming? Comet ISON may grow into a truly incredible sight. Or not. A faint and distant comet discovered by Russian ama- potential for becoming a spectacular object, comets are teur astronomers Vitali Nevski and Artyom Novichonok notoriously unpredictable. Observers need only recall the in September is going to be big news in late 2013. But dismal failure of Comet Elenin in 2011, which was also whether it will become a great comet remains unclear. touted to become a grand spectacle. From the outset, Comet C/2012 S1 (also known as As this is being written, only a few weeks after the Comet ISON after the International Scientific Optical discovery with Comet ISON still 6 a.u. from the Sun, it’s Network involved with its discovery) was wrapped in a unclear whether the comet’s orbit is parabolic or very swirl of hype and controversy. The initial orbital elements, highly elliptical — an important factor for the comet’s indicating that the comet will pass just 0.01 astronomical future performance. A parabolic orbit suggests that the unit (a.u.) from the Sun, generated a firestorm of wild comet is coming in from the Oort Cloud for a first-time speculation across the internet. Poor understanding of swing by the Sun. Such objects often brighten very early, how comets typically behave led people to post early com- raising high hopes, but once they come within about 1½ ments suggesting that Comet ISON would become 100 a.u. of the Sun their brightening can radically slow. -
The Astronews July 2021
The Astronews www.hawastsoc.org July 2021 A word from your editor by Inside this issue: Sapavith ‘Ort’ Vanapruks HAS have decided to cancel public HAS Club Information 2 events for the time being for both public star party at Dillingham and in town star parties President’s Message 2 at Kahala and Geiger, as well as the monthly club meeting. These cancellations will con- tinue while we are still in tier level. As we Observer’s Notebook 3 are now in modified tier 4 on Oahu, we will only have the club member only star party. We will be limiting the club party to the key Meeting Minutes 4 master and 29 extra members. Please check your email and website for an update. Event Calendar 5 I have been trying to capture ISS transit in front of the Sun/Moon for many years. I used ISS Transit Finder website (https:// NASA’s Night Sky Notes 7 transit-finder.com/) to help me find the trans- it near me. Those many times I tried, I failed due to many reasons. Some of the reasons Meteor Log 8 are bad weather, incorrect camera setting, and unstable mount. Treasurer’s Report 9 Upcoming Events: • The next Board meeting is Sun., July 4th 3:30 PM. (Zoom Meeting) • The next meeting is on Tue., July 6th at the Bishop Museum at 7:30 PM. —Zoom Meeting • Bishop Museum’s planetarium shows are every 1st Saturday of the month at 8:00 PM (Online) www.bishopmuseum.org/calendar The latest opportunity was this past Tues- day morning, 6/29/2021, at 1:27 AM.