DOCSLIB.ORG

Carbon Star Observing Club Mark Croom, Lifetime AL Member-At-Large the List of Stars Observation Notes 100 Mag/Sq" ° C

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Carbon Star Observing Club Mark Croom, Lifetime AL Member-At-Large the List of Stars Observation Notes 100 Mag/Sq Carbon Star Observing Club Mark Croom, Lifetime AL Member-At-Large The List of Stars Observation Notes 100 (of 10=best; D.Peach) mag/sq" ° C (used to make the sketch) No. Name Date Time EDT Seeing Trans SQM Temp Scope Mount Site Eyepiece Mag f.o.v. (') Comments Orange color. There are two stars (labeled with an "o" on the sketch) with similar color, but WZ is the one to the east (brighter one) surrounded by the straight hack 1 WZ Cassiopeiae 3/10/2012 18:59 8 7 n/a 3 AT10RC APMach1 HexPad 13 Ethos 156 38 marks drawn near the edge of the sketch. 2 SU Andromedae 3/10/2012 19:05 8 7 n/a 3 AT10RC APMach1 HexPad 13 Ethos 156 38 Dull orange at low (41x) and moderate (156x) powers. SAO 109003 (HD 26) was located by its position among the bent-line asterism, as its 3 SAO 109003 7/26/2012 1:55 7 7 19.26 24 AT10RC APMach1 HexPad 13 Ethos 156 38 color is nearly white. Red-orange, VX And is an isolated, moderately bright star (although brighter stars 4 VX Andromedae 3/10/2012 19:10 8 7 n/a 3 AT10RC APMach1 HexPad 13 Ethos 156 38 are near the edge of the fov). Easy hop from SU And (C#2). 5 AQ Andromedae 3/10/2012 19:19 8 7 n/a 2 AT10RC APMach1 HexPad 13 Ethos 156 38 Orange color. Brightest star in the 156x fov. Looking through a thin haze layer (contrail?) and low to the horizon. Target star is 6 NSV 15196 3/10/2012 19:25 5 6 19.22 2 AT10RC APMach1 HexPad 13 Ethos 156 38 faint and in a weak field. Color is a pale yellow-orange. Only 1 fov away from U Cas in the 13mm Ethos, color gives W Cas away even though 7 W Cassiopeiae 3/10/2012 19:30 7 8 19.22 2 AT10RC APMach1 HexPad 13 Ethos 156 38 the star is faint. Burnt orange-red. Brightest star in the 41x fov. Pale red-orange color. Color is a little more 8 Z Piscium 3/10/2012 19:38 7 8 19.22 2 AT10RC APMach1 HexPad 13 Ethos 156 38 pronounced at 156x. Location nearly makes an equilateral triangle with Jupiter and Venus (although V Ari is too faint to see unaided). V Ari is a pale orange and is one of the fainter stars in 9 V Arietis 3/10/2012 19:45 7 8 19.22 2 AT10RC APMach1 HexPad 13 Ethos 156 38 the 38' fov. 2nd brightest star in fov at low power (50mm, 41x) and as drawn in the sketch at 10 SAO 129989 2/20/2012 19:20 8 7 19.15 3 AT10RC APMach1 HexPad 13 Ethos 156 38 156x. Slightly orange in color, but not strongly so. Near NGC 1023, faint UY And shows some coloration (slight orange), and is 11 UY Andromedae 2/20/2012 19:50 8 7 19.2 3 AT10RC APMach1 HexPad 13 Ethos 156 38 identified by its relative position wrt brighter stars in the fov more than by its color. 12 V623 Cassiopeiae 2/20/2012 20:00 8 7 19.2 3 AT10RC APMach1 HexPad 13 Ethos 156 38 Red-orange color identifies V623 Cas among a field of similarly bright stars. Stands out by its orange-red color with the 50mm (61x), but the color becomes 13 Y Persei 2/17/2012 19:31 7 6 20.8 8 12" ACF AP1200 MW 13 Ethos 234 25 slightly more muted at 234x with the 13mm Ethos. Orange-red color betrays V466 Per. At 13mm Ethos 38' fov, stars are near the "4 14 V466 Persei 2/20/2012 20:10 8 7 19.2 1 AT10RC APMach1 HexPad 13 Ethos 156 38 corners" of the fov. Obvious orange-red shows obvious contrast to other stars in the fov. Near Kemble's 15 U Camelopardalis 2/20/2012 20:25 8 7 19.27 -1 AT10RC APMach1 HexPad 13 Ethos 156 38 Cascade. 16 UV Camelopardalis 2/20/2012 20:30 8 7 19.27 -1 AT10RC APMach1 HexPad 13 Ethos 156 38 One field away from NGC 1502. Orange hue of UV Cam is easily discerned. 17 XX Camelopardalis 3/10/2012 19:52 7 8 19.2 2 AT10RC APMach1 HexPad 13 Ethos 156 38 Middle of a scalene triangle tells XX Cam, because color is nearly white! 18 ST Camelopardalis 3/10/2012 19:58 8 7 19.2 2 AT10RC APMach1 HexPad 13 Ethos 156 38 Orange and brightest (or maybe tied) star in the 13mm Ethos 38' fov. 19 TT Tauri 2/17/2012 21:15 7 6 20.6 3 12" ACF AP1200 MW 50 OPT 61 45 Coloration makes this star standout in the wide field. Orangish shade. Hind's Crimson Star. Obvious garnet color - striking in wide fov. Coloration is not as 20 R Leporis 2/17/2012 20:15 7 6 20.8 8 12" ACF AP1200 MW 50 OPT 61 45 jewel-like at 234x with 13mm, but still obviously red. Distinctive orange-red color and proximity to loose cluster-like asterism makes EL 21 EL Aurigae 3/10/2012 20:05 8 7 19.2 1 AT10RC APMach1 HexPad 13 Ethos 156 38 Aur easy to confirm. Near 5th magnitude 9 Aur. Brightest star in the low power (61x) fov of the 50mm eyepiece. Red tint is fairly visible, overwhelmed by its brightness. Coloration is more obvious when defocused 22 W Orionis 2/17/2012 20:30 7 6 20.8 4 12" ACF AP1200 MW 50 OPT 61 45 or at 234x with the 13mm, especially in contrast to the other stars in the fov. Not the brightest star (maybe 5th) in the 25' 234x fov. Red-orange color gives it 23 TX Aurigae 2/17/2012 21:25 7 6 20.8 3 12" ACF AP1200 MW 13 Ethos 234 25 away. Brightest, or tied with one other, in the 25' fov at 234x. Color is obvious at 61x, still 24 SY Eridani 2/17/2012 20:40 7 6 20.8 4 12" ACF AP1200 MW 13 Ethos 234 25 readily apparent at 234x. Orange-red. Orange color is prevalent; it identifies the star in a field of several brighter stars. 25 UV Aurigae 2/17/2012 21:35 7 7 20.8 3 12" ACF AP1200 MW 13 Ethos 234 25 Orange primary with blue secondary 11th mag at 3" sep. Faint star, red color highlight in among several brighter stars. (Near the previous 26 S Aurigae 2/17/2012 21:45 7 7 20.8 3 12" ACF AP1200 MW 13 Ethos 234 25 star C#25, and the NGC 1931 complex sketched for RASC). Reddest star in wide 61x fov with 50mm OPT eyepiece. Orange-red color gets 27 RT Orionis 2/17/2012 20:50 7 6 20.8 4 12" ACF AP1200 MW 13 Ethos 234 25 slightly muted at higher power, but still obviously orange-red. Carbon Star Observing Club Mark Croom, Lifetime AL Member-At-Large The List of Stars Observation Notes 100 (of 10=best; D.Peach) mag/sq" ° C (used to make the sketch) No. Name Date Time EDT Seeing Trans SQM Temp Scope Mount Site Eyepiece Mag f.o.v. (') Comments Very faint, color is impossible to discern. Offset field to get pentagram of brighter 28 S Camelopardalis 3/10/2012 20:22 8 7 19.2 0 AT10RC APMach1 HexPad 13 Ethos 156 38 stars in the sketch to aid in confirmation. 29 TU Tauri 3/10/2012 20:32 8 8 19.24 0 AT10RC APMach1 HexPad 13 Ethos 156 38 Orange-red, one of the brightest members of an asterism just N. Red-orange color and brightest object in narrow (25') fov. Low power (61x with 30 Y Tauri 2/17/2012 21:55 7 7 20.88 2 12" ACF AP1200 MW 13 Ethos 234 25 50mm) shows Y Tau as a shimmering jewel - it stands out nicely. 31 FU Aurigae 2/17/2012 22:10 7 7 20.88 2 12" ACF AP1200 MW 13 Ethos 234 25 Obvious red-orange star among some brighter stars at 61x and 234x. Color makes TU Gem standout in the 61x and 234x fov. Gem-like glitter at lower power: orange (burnt). Within 2 deg N of M35. REPEAT OBSERVATION on 3/10/2012 at HexPad with AT10RC at 156x: strong red-orange color. Color makes TU 32 TU Geminorum 2/17/2012 22:10 7 7 20.88 2 12" ACF AP1200 MW 50 OPT 61 45 Gem standout among brighter stars in the fov. 33 FU Monocerotis 2/17/2012 22:15 7 7 20.88 1 12" ACF AP1200 MW 50 OPT 61 45 Orange color makes FU Mon a standout in the fov. V Aur is fairly faint (similar to star labeled "1" north of V Aur on sketch). Red-orange 34 V Aurigae 3/10/2012 20:48 8 8 19.24 0 AT10RC APMach1 HexPad 13 Ethos 156 38 coloration is apparent, but not strongly so. 35 BL Orionis 2/17/2012 21:00 7 6 20.6 3 12" ACF AP1200 MW 13 Ethos 234 25 Brightest star in 25' fov - obvious from magnitude and orange-red color. 36 UU Aurigae 3/10/2012 20:54 8 8 19.24 0 AT10RC APMach1 HexPad 13 Ethos 156 38 Bright and prominently orange - easy target! Faint secondary was not seen.
Load more

Recommended publications
  • 145, September 2010
    British Astronomical Association VARIABLE STAR SECTION CIRCULAR No 145, September 2010 Contents EG Andromedae Light Curve ................................................... inside front cover From the Director ............................................................................................... 1 Letter Page. Visual Observing ............................................................................ 4 Epsilon Aurigae Spectroscopically at Mid Eclipse .......................................... 5 Eclipsing Binary News ...................................................................................... 7 AO Cassiopeiae Phase Diagram ............................................................ 9 PV Cephei and Gyulbudaghian’s Nebula ........................................................ 10 WR140 Periastron Campaign Update .............................................................. 12 VSS Meeting, Pendrell Hall. The Central Stars of Planetary Nebulae ............ 14 RR Coronae Borealis 1993-2004 ...................................................................... 16 TU Cassiopeiae Phase Diagram 2005-2010 ..................................................... 18 Binocular Priority List ..................................................................................... 19 Eclipsing Binary Predictions ............................................................................ 20 Charges for Section Publications .............................................. inside back cover Guidelines for Contributing to the Circular .............................
    [Show full text]
  • Winter Constellations
    Winter Constellations *Orion *Canis Major *Monoceros *Canis Minor *Gemini *Auriga *Taurus *Eradinus *Lepus *Monoceros *Cancer *Lynx *Ursa Major *Ursa Minor *Draco *Camelopardalis *Cassiopeia *Cepheus *Andromeda *Perseus *Lacerta *Pegasus *Triangulum *Aries *Pisces *Cetus *Leo (rising) *Hydra (rising) *Canes Venatici (rising) Orion--Myth: Orion, the great ​ ​ hunter. In one myth, Orion boasted he would kill all the wild animals on the earth. But, the earth goddess Gaia, who was the protector of all animals, produced a gigantic scorpion, whose body was so heavily encased that Orion was unable to pierce through the armour, and was himself stung to death. His companion Artemis was greatly saddened and arranged for Orion to be immortalised among the stars. Scorpius, the scorpion, was placed on the opposite side of the sky so that Orion would never be hurt by it again. To this day, Orion is never seen in the sky at the same time as Scorpius. DSO’s ● ***M42 “Orion Nebula” (Neb) with Trapezium A stellar ​ ​ ​ nursery where new stars are being born, perhaps a thousand stars. These are immense clouds of interstellar gas and dust collapse inward to form stars, mainly of ionized hydrogen which gives off the red glow so dominant, and also ionized greenish oxygen gas. The youngest stars may be less than 300,000 years old, even as young as 10,000 years old (compared to the Sun, 4.6 billion years old). 1300 ly. ​ ​ 1 ● *M43--(Neb) “De Marin’s Nebula” The star-forming ​ “comma-shaped” region connected to the Orion Nebula. ● *M78--(Neb) Hard to see. A star-forming region connected to the ​ Orion Nebula.
    [Show full text]
  • Naming the Extrasolar Planets
    Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named.
    [Show full text]
  • Arxiv:2006.10868V2 [Astro-Ph.SR] 9 Apr 2021 Spain and Institut D’Estudis Espacials De Catalunya (IEEC), C/Gran Capit`A2-4, E-08034 2 Serenelli, Weiss, Aerts Et Al
    Noname manuscript No. (will be inserted by the editor) Weighing stars from birth to death: mass determination methods across the HRD Aldo Serenelli · Achim Weiss · Conny Aerts · George C. Angelou · David Baroch · Nate Bastian · Paul G. Beck · Maria Bergemann · Joachim M. Bestenlehner · Ian Czekala · Nancy Elias-Rosa · Ana Escorza · Vincent Van Eylen · Diane K. Feuillet · Davide Gandolfi · Mark Gieles · L´eoGirardi · Yveline Lebreton · Nicolas Lodieu · Marie Martig · Marcelo M. Miller Bertolami · Joey S.G. Mombarg · Juan Carlos Morales · Andr´esMoya · Benard Nsamba · KreˇsimirPavlovski · May G. Pedersen · Ignasi Ribas · Fabian R.N. Schneider · Victor Silva Aguirre · Keivan G. Stassun · Eline Tolstoy · Pier-Emmanuel Tremblay · Konstanze Zwintz Received: date / Accepted: date A. Serenelli Institute of Space Sciences (ICE, CSIC), Carrer de Can Magrans S/N, Bellaterra, E- 08193, Spain and Institut d'Estudis Espacials de Catalunya (IEEC), Carrer Gran Capita 2, Barcelona, E-08034, Spain E-mail: [email protected] A. Weiss Max Planck Institute for Astrophysics, Karl Schwarzschild Str. 1, Garching bei M¨unchen, D-85741, Germany C. Aerts Institute of Astronomy, Department of Physics & Astronomy, KU Leuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium and Department of Astrophysics, IMAPP, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands G.C. Angelou Max Planck Institute for Astrophysics, Karl Schwarzschild Str. 1, Garching bei M¨unchen, D-85741, Germany D. Baroch J. C. Morales I. Ribas Institute of· Space Sciences· (ICE, CSIC), Carrer de Can Magrans S/N, Bellaterra, E-08193, arXiv:2006.10868v2 [astro-ph.SR] 9 Apr 2021 Spain and Institut d'Estudis Espacials de Catalunya (IEEC), C/Gran Capit`a2-4, E-08034 2 Serenelli, Weiss, Aerts et al.
    [Show full text]
  • FY13 High-Level Deliverables
    National Optical Astronomy Observatory Fiscal Year Annual Report for FY 2013 (1 October 2012 – 30 September 2013) Submitted to the National Science Foundation Pursuant to Cooperative Support Agreement No. AST-0950945 13 December 2013 Revised 18 September 2014 Contents NOAO MISSION PROFILE .................................................................................................... 1 1 EXECUTIVE SUMMARY ................................................................................................ 2 2 NOAO ACCOMPLISHMENTS ....................................................................................... 4 2.1 Achievements ..................................................................................................... 4 2.2 Status of Vision and Goals ................................................................................. 5 2.2.1 Status of FY13 High-Level Deliverables ............................................ 5 2.2.2 FY13 Planned vs. Actual Spending and Revenues .............................. 8 2.3 Challenges and Their Impacts ............................................................................ 9 3 SCIENTIFIC ACTIVITIES AND FINDINGS .............................................................. 11 3.1 Cerro Tololo Inter-American Observatory ....................................................... 11 3.2 Kitt Peak National Observatory ....................................................................... 14 3.3 Gemini Observatory ........................................................................................
    [Show full text]
  • Abstracts of Extreme Solar Systems 4 (Reykjavik, Iceland)
    Abstracts of Extreme Solar Systems 4 (Reykjavik, Iceland) American Astronomical Society August, 2019 100 — New Discoveries scope (JWST), as well as other large ground-based and space-based telescopes coming online in the next 100.01 — Review of TESS’s First Year Survey and two decades. Future Plans The status of the TESS mission as it completes its first year of survey operations in July 2019 will bere- George Ricker1 viewed. The opportunities enabled by TESS’s unique 1 Kavli Institute, MIT (Cambridge, Massachusetts, United States) lunar-resonant orbit for an extended mission lasting more than a decade will also be presented. Successfully launched in April 2018, NASA’s Tran- siting Exoplanet Survey Satellite (TESS) is well on its way to discovering thousands of exoplanets in orbit 100.02 — The Gemini Planet Imager Exoplanet Sur- around the brightest stars in the sky. During its ini- vey: Giant Planet and Brown Dwarf Demographics tial two-year survey mission, TESS will monitor more from 10-100 AU than 200,000 bright stars in the solar neighborhood at Eric Nielsen1; Robert De Rosa1; Bruce Macintosh1; a two minute cadence for drops in brightness caused Jason Wang2; Jean-Baptiste Ruffio1; Eugene Chiang3; by planetary transits. This first-ever spaceborne all- Mark Marley4; Didier Saumon5; Dmitry Savransky6; sky transit survey is identifying planets ranging in Daniel Fabrycky7; Quinn Konopacky8; Jennifer size from Earth-sized to gas giants, orbiting a wide Patience9; Vanessa Bailey10 variety of host stars, from cool M dwarfs to hot O/B 1 KIPAC, Stanford University (Stanford, California, United States) giants. 2 Jet Propulsion Laboratory, California Institute of Technology TESS stars are typically 30–100 times brighter than (Pasadena, California, United States) those surveyed by the Kepler satellite; thus, TESS 3 Astronomy, California Institute of Technology (Pasadena, Califor- planets are proving far easier to characterize with nia, United States) follow-up observations than those from prior mis- 4 Astronomy, U.C.
    [Show full text]
  • GEORGE HERBIG and Early Stellar Evolution
    GEORGE HERBIG and Early Stellar Evolution Bo Reipurth Institute for Astronomy Special Publications No. 1 George Herbig in 1960 —————————————————————– GEORGE HERBIG and Early Stellar Evolution —————————————————————– Bo Reipurth Institute for Astronomy University of Hawaii at Manoa 640 North Aohoku Place Hilo, HI 96720 USA . Dedicated to Hannelore Herbig c 2016 by Bo Reipurth Version 1.0 – April 19, 2016 Cover Image: The HH 24 complex in the Lynds 1630 cloud in Orion was discov- ered by Herbig and Kuhi in 1963. This near-infrared HST image shows several collimated Herbig-Haro jets emanating from an embedded multiple system of T Tauri stars. Courtesy Space Telescope Science Institute. This book can be referenced as follows: Reipurth, B. 2016, http://ifa.hawaii.edu/SP1 i FOREWORD I first learned about George Herbig’s work when I was a teenager. I grew up in Denmark in the 1950s, a time when Europe was healing the wounds after the ravages of the Second World War. Already at the age of 7 I had fallen in love with astronomy, but information was very hard to come by in those days, so I scraped together what I could, mainly relying on the local library. At some point I was introduced to the magazine Sky and Telescope, and soon invested my pocket money in a subscription. Every month I would sit at our dining room table with a dictionary and work my way through the latest issue. In one issue I read about Herbig-Haro objects, and I was completely mesmerized that these objects could be signposts of the formation of stars, and I dreamt about some day being able to contribute to this field of study.
    [Show full text]
  • Download This Issue (Pdf)
    Volume 46 Number 1 JAAVSO 2018 The Journal of the American Association of Variable Star Observers Optical Flares and Quasi-Periodic Pulsations on CR Draconis during Periastron Passage Upper panel: 2017-10-10-flare photon counts, time aligned with FFT spectrogram. Lower panel: FFT spectrogram shows time in UT seconds versus QPP periods in seconds. Flares cited by Doyle et al. (2018) are shown with (*). Also in this issue... • The Dwarf Nova SY Cancri and its Environs • KIC 8462852: Maria Mitchell Observatory Photographic Photometry 1922 to 1991 • Visual Times of Maxima for Short Period Pulsating Stars III • Recent Maxima of 86 Short Period Pulsating Stars Complete table of contents inside... The American Association of Variable Star Observers 49 Bay State Road, Cambridge, MA 02138, USA The Journal of the American Association of Variable Star Observers Editor John R. Percy Kosmas Gazeas Kristine Larsen Dunlap Institute of Astronomy University of Athens Department of Geological Sciences, and Astrophysics Athens, Greece Central Connecticut State University, and University of Toronto New Britain, Connecticut Toronto, Ontario, Canada Edward F. Guinan Villanova University Vanessa McBride Associate Editor Villanova, Pennsylvania IAU Office of Astronomy for Development; Elizabeth O. Waagen South African Astronomical Observatory; John B. Hearnshaw and University of Cape Town, South Africa Production Editor University of Canterbury Michael Saladyga Christchurch, New Zealand Ulisse Munari INAF/Astronomical Observatory Laszlo L. Kiss of Padua Editorial Board Konkoly Observatory Asiago, Italy Geoffrey C. Clayton Budapest, Hungary Louisiana State University Nikolaus Vogt Baton Rouge, Louisiana Katrien Kolenberg Universidad de Valparaiso Universities of Antwerp Valparaiso, Chile Zhibin Dai and of Leuven, Belgium Yunnan Observatories and Harvard-Smithsonian Center David B.
    [Show full text]
  • Preliminary Analysis of Light Curves of Seven Carbon Stars J
    Contrib. Astron. Obs. Skalnat´ePleso 33, 119 { 133, (2003) Preliminary analysis of light curves of seven carbon stars J. Duˇsek1, Z. Mikul´aˇsek2 and J. Papouˇsek3 1 N. Copernicus Observatory and Planetarium in Brno, Krav´ıhora 2, 616 00 Brno, Czech Republic, (E-mail: [email protected]) 2 Institute of Theoretical Physics and Astrophysics, Faculty of Science, Masaryk University Brno, Kotl´aˇrsk´a2, 611 37 Brno, Czech Republic, (E-mail: [email protected]) 3 Ml´ynsk´a56, 602 00 Brno, Czech Republic Received: August 2, 2002 Abstract. We present a preliminary analysis of the light curves of the following carbon stars: WZ Cas, VY UMa, Y CVn, RY Dra, T Lyr, HK Lyr and TT Cyg, constructed on the basis of our own BV photoelectric observations obtained at the Brno Observatory in 1979-94 and Hipparcos observations. The analysis suggests that "semiregular" light curves of all studied stars can faithfully be expressed by a superposition of long-term changes and a set of medium-term harmonic variations (possibly pulsations) with periods from 50 to 500 days. Key words: AGB stars { carbon stars { individual stars { stellar pulsations { periods { UBV photometry { Hipparcos photometry 1. Introduction Chemically peculiar late stars, so-called "carbon stars", are asymptotic giant branch (AGB) objects whose atmospheres are vigorously polluted by chemical elements originating namely from carbon in nuclear processes in their deep in- teriors. Theoreticians claim that every star with the initial mass from 1.5 M to 4 M should go through the stage of a carbon star lasting about 3.105 years before it finally transforms into a white dwarf (Groenewegen et al., 1995).
    [Show full text]
  • Observer's Handbook 1980
    OBSERVER’S HANDBOOK 1980 EDITOR: JOHN R. PERCY ROYAL ASTRONOMICAL SOCIETY OF CANADA CONTRIBUTORS AND ADVISORS A l a n H. B a t t e n , Dominion Astrophysical Observatory, Victoria, B.C., Canada V 8 X 3X3 (The Nearest Stars). Terence Dickinson, R.R. 3, Odessa, Ont., Canada K0H 2H0 (The Planets). M arie Fidler, Royal Astronomical Society of Canada, 124 Merton St., Toronto, Ont., Canada M4S 2Z2 (Observatories and Planetariums). V ictor Gaizauskas, Herzberg Institute of Astrophysics, National Research Council, Ottawa, Ont., Canada K1A 0R6 (Sunspots). J o h n A. G a l t , Dominion Radio Astrophysical Observatory, Penticton, B.C., Canada V2A 6K3 (Radio Sources). Ian Halliday, Herzberg Institute of Astrophysics, National Research Council, Ottawa, Ont., Canada K1A 0R6 (Miscellaneous Astronomical Data). H e le n S. H o g g , David Dunlap Observatory, University of Toronto, Richmond Hill, Ont., Canada L4C 4Y6 (Foreword). D o n a l d A. M a c R a e , David Dunlap Observatory, University of Toronto, Richmond Hill, Ont., Canada L4C 4Y6 (The Brightest Stars). B r ia n G. M a r s d e n , Smithsonian Astrophysical Observatory, Cambridge, Mass., U.S.A. 02138 (Comets). Janet A. M attei, American Association o f Variable Star Observers, 187 Concord Ave., Cambridge, Mass. U.S.A. 02138 (Variable Stars). P e t e r M. M illm a n , Herzberg Institute o f Astrophysics, National Research Council, Ottawa, Ont., Canada K1A 0R6 (Meteors, Fireballs and Meteorites). A n t h o n y F. J. M o f f a t , D épartement de Physique, Université de Montréal, Montréal, P.Q., Canada H3C 3J7 (Star Clusters).
    [Show full text]
  • Commissions 27 and 42 of the I.A.U. Information Bulletin on Variable Stars
    COMMISSIONS 27 AND 42 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 3901 - 4000 1993 June - 1994 February EDITORS: L. Szabados and K. Olah KONKOLY OBSERVATORY H-1525 BUDAPEST P.O. Box 67, HUNGARY HU ISSN 0374 - 0676 CONTENTS 3901 TIME OF LIGHT MAXIMUM OF BW VULPECULAE C. Sterken, K. Vyverman, H.W.W. Spoon 28 June 1993 3902 THE FOUR BODY SYSTEM Y Cam? L. Mossakovskaya 29 June 1993 3903 TIMES OF MINIMUM OF ECLIPSING BINARIES WITH NON-CIRCULAR ORBITS R. Diethelm 6 July 1993 3904 SPECTRUM OF THE ENVELOPE AROUND PRIMARY IN RX Cas P.N. Todorova 7 July 1993 3905 BV PHOTOELECTRIC PHOTOMETRY OF SN 1993J IN NGC 3031 = M81 U. Munari, G. Sostero, A. Lepardo, T. Valentinuzzi 8 July 1993 3906 STROMGREN b, y PHOTOMETRY OF STARS IN THE FIELD OF MESSIER 81 (= NGC 3031) B.A. Skiff 21 July 1993 3907 IDENTIFICATION OF NSV STARS IN THE HUBBLE SPACE TELESCOPE GUIDE STAR CATALOGUE. II. C.E. Lopez 22 July 1993 3908 IDENTIFICATION OF VARIABLE STARS IN THE HUBBLE SPACE TELESCOPE GUIDE STAR CATALOGUE C.E. Lopez, H.S. Lepez 22 July 1993 3909 ON THE CROSS-IDENTIFICATION OF V577 CrA AND V607 CrA C.E. Lopez 22 July 1993 3910 NOVA V360 HERCULIS (1892) IDENTIFIED R.F. Webbink 26 July 1993 3911 NEW SPECTROSCOPIC ELEMENTS FOR RX Cas P.N. Todorova 27 July 1993 3912 PHOTOELECTRIC PHOTOMETRY OF THE CARBON STAR TX PISCIUM R. Wasatonic 27 July 1993 3913 DIFFERENTIAL UBV PHOTOMETRY OF THE CP3 STAR HD 89822 M. Zboril, J. Budaj 28 July 1993 3914 PERIOD AND LIGHT CURVES OF A NEW W UMa VARIABLE GSC 4383.0384 Z.
    [Show full text]
  • Information Bulletin on Variable Stars
    COMMISSIONS AND OF THE I A U INFORMATION BULLETIN ON VARIABLE STARS Nos April November EDITORS L SZABADOS K OLAH TECHNICAL EDITOR A HOLL TYPESETTING MB POCS ADMINISTRATION Zs KOVARI EDITORIAL BOARD E Budding HW Duerb eck EF Guinan P Harmanec chair D Kurtz KC Leung C Maceroni NN Samus advisor C Sterken advisor H BUDAPEST XI I Box HUNGARY URL httpwwwkonkolyhuIBVSIBVShtml HU ISSN 2 IBVS 4701 { 4800 COPYRIGHT NOTICE IBVS is published on b ehalf of the th and nd Commissions of the IAU by the Konkoly Observatory Budap est Hungary Individual issues could b e downloaded for scientic and educational purp oses free of charge Bibliographic information of the recent issues could b e entered to indexing sys tems No IBVS issues may b e stored in a public retrieval system in any form or by any means electronic or otherwise without the prior written p ermission of the publishers Prior written p ermission of the publishers is required for entering IBVS issues to an electronic indexing or bibliographic system to o IBVS 4701 { 4800 3 CONTENTS WOLFGANG MOSCHNER ENRIQUE GARCIAMELENDO GSC A New Variable in the Field of V Cassiop eiae :::::::::: JM GOMEZFORRELLAD E GARCIAMELENDO J GUARROFLO J NOMENTORRES J VIDALSAINZ Observations of Selected HIPPARCOS Variables ::::::::::::::::::::::::::: JM GOMEZFORRELLAD HD a New Low Amplitude Variable Star :::::::::::::::::::::::::: ME VAN DEN ANCKER AW VOLP MR PEREZ D DE WINTER NearIR Photometry and Optical Sp ectroscopy of the Herbig Ae Star AB Au rigae :::::::::::::::::::::::::::::::::::::::::::::::::::
    [Show full text]