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BAV Rundbrief Nr. 3 (2014)
BAV Rundbrief 2014 | Nr. 3 | 63. Jahrgang | ISSN 0405-5497 Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V. (BAV) BAV Rundbrief 2014 | Nr. 3 | 63. Jahrgang | ISSN 0405-5497 Table of Contents G. Maintz Revised elements of AP CVn and BH Ser 137 R. Gröbel Lightcurve and period of four RR Lyrae stars in Ursa Major: AG UMa, AV UMa, BK UMa and CK UMa 139 Inhaltsverzeichnis G. Maintz Verbesserte Elemente von AP CVn und BH Ser 137 R. Gröbel Lichtkurve und Periode von vier RR-Lyrae-Sternen in Ursa Major: AG UMa, AV UMa, BK UMa und CK UMa 139 Beobachtungsberichte D. Böhme Ist MP Gem ein Bedeckungsveränderlicher? 146 E. Pollmann / Zwischenergebnisse der 28-Tau-Kampagne 149 W. Vollmann F. Vohla U Orionis - ein (B-R)-Schelm 152 K. Wenzel Visuelle Lichtkurve von S5 0716+71 für den Beobachtungszeit- raum von August 2013 bis April 2014 154 K. Bernhard / Datamining leicht gemacht: Onlinekataloge für Einsteiger 155 S. Hümmerich Aus der Literatur Uni Bonn Spektakuläre Doppelexplosion am Sternenhimmel 161 E. Wischnewski Beobachtungsaufruf für Eta Orionis 163 Aus der BAV D. Bannuscher Neuigkeiten aus dem BAV-Vereinsleben 164 BAV-Vorstand BAV-Tagung Programmpunkte 165 D. Bannuscher Veränderlichenbeobachter-Treffen 2014 in Hartha 167 J. Hübscher Die systematische Überwachung veränderlicher Sterne durch BAV-Beobachter 170 W. Braune Veränderliche Sterne in „Sterne und Weltraum“ 174 T. Lange Rudolf Obertrifter ist verstorben 175 P. Reinhard Erlebnisbericht Namibia 2014 176 Aus den Sektionen F. Walter Bericht der Sektion „Bedeckungsveränderliche“ 2012 - 2014 178 G. Maintz Bericht der Sektion RR-Lyrae-Sterne 2012 - 2014 179 G. Monninger Bericht der Sektion Delta-Scuti-Sterne 2012 - 2014 180 R. -
Thanet Astronomy Group Astronomy for Everyone in Plain English
Thanet Astronomy Group Astronomy for Everyone in Plain English What to see December 29th Constellation (Orion) Stars (Betelguese, Bellatrix, Alnitak, Alnilam, Mintaka, Rigel, Saiph,) Asterism (The Winter Triangle) Stars (Betelguese, Sirius, Procyon) November to March the constellation Orion the Hunter is at its best. There are some 20 prominent stars in this constellation. The brightest and more easily observed stars are the 8 in the main body. The other stars form Orion's right arm with club, and a slain animal in his left hand. These stars are dimmer and difficult to see due to light pollution. At 8:00pm Looking South East at 119° up to 30° you see the star Betelguese, the top left corner of Orion, a red super giant, more than 1½ billion kms in diameter. Look at 127° up to 33° you see the star Bellatrix, the top right corner of Orion, at 8½ million kms in diameter. Look at 128° down to 24° you see Alnitak, the first of three stars side by side, forming Orion's belt. Alnitak, Alnilam (at 128° 25°) and Mintaka (at 129° 26°). Probably one of the more easily recognised groups of stars in this area of sky. Look at 137° down to 21° you see the star Rigel, the bottom right corner of Orion. A blue/white super giant, 108 million kms in diameter. Look at 130° down to 16° you see the star Saiph the bottom left corner of Orion, nearly 31 million kms in diameter. Orion Stars Orion the Hunter In August I wrote about The Summer Triangle. -
C. Mintaka, Alnitak, Alnilam
Post-18.1: This graph shows the functional form of the dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? a. ~ 1.00 arcsec b. ~ 2.2 pc c. ~ 10 pc ©2014 W. W. Norton & Company, Inc. 8 Post-18.1: This graph shows the functional form of the dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? a. ~ 1.00 arcsec b. ~ 2.2 pc c. ~ 10 pc ©2014 W. W. Norton & Company, Inc. 9 Post-18.2: The Moon never stops in its orbit; however, it is possible to get an exact measurement of its parallax and thus its distance at any given moment. How would we get the parallax shift of the Moon? a. Take simultaneous measurements from two locations. b. Take two measurements at different times from one location. c. Take two measurements from the same location at the same phase of the Moon. ©2014 W. W. Norton & Company, Inc. 10 Post-18.2: The Moon never stops in its orbit; however, it is possible to get an exact measurement of its parallax and thus its distance at any given moment. How would we get the parallax shift of the Moon? a. Take simultaneous measurements from two locations. b. Take two measurements at different times from one location. -
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. -
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. -
Winter Observing Notes
Wynyard Planetarium & Observatory Winter Observing Notes Wynyard Planetarium & Observatory PUBLIC OBSERVING – Winter Tour of the Sky with the Naked Eye NGC 457 CASSIOPEIA eta Cas Look for Notice how the constellations 5 the ‘W’ swing around Polaris during shape the night Is Dubhe yellowish compared 2 Polaris to Merak? Dubhe 3 Merak URSA MINOR Kochab 1 Is Kochab orange Pherkad compared to Polaris? THE PLOUGH 4 Mizar Alcor Figure 1: Sketch of the northern sky in winter. North 1. On leaving the planetarium, turn around and look northwards over the roof of the building. To your right is a group of stars like the outline of a saucepan standing up on it’s handle. This is the Plough (also called the Big Dipper) and is part of the constellation Ursa Major, the Great Bear. The top two stars are called the Pointers. Check with binoculars. Not all stars are white. The colour shows that Dubhe is cooler than Merak in the same way that red-hot is cooler than white-hot. 2. Use the Pointers to guide you to the left, to the next bright star. This is Polaris, the Pole (or North) Star. Note that it is not the brightest star in the sky, a common misconception. Below and to the right are two prominent but fainter stars. These are Kochab and Pherkad, the Guardians of the Pole. Look carefully and you will notice that Kochab is slightly orange when compared to Polaris. Check with binoculars. © Rob Peeling, CaDAS, 2007 version 2.0 Wynyard Planetarium & Observatory PUBLIC OBSERVING – Winter Polaris, Kochab and Pherkad mark the constellation Ursa Minor, the Little Bear. -
Astronomy Magazine Special Issue
γ ι ζ γ δ α κ β κ ε γ β ρ ε ζ υ α φ ψ ω χ α π χ φ γ ω ο ι δ κ α ξ υ λ τ μ β α σ θ ε β σ δ γ ψ λ ω σ η ν θ Aι must-have for all stargazers η δ μ NEW EDITION! ζ λ β ε η κ NGC 6664 NGC 6539 ε τ μ NGC 6712 α υ δ ζ M26 ν NGC 6649 ψ Struve 2325 ζ ξ ATLAS χ α NGC 6604 ξ ο ν ν SCUTUM M16 of the γ SERP β NGC 6605 γ V450 ξ η υ η NGC 6645 M17 φ θ M18 ζ ρ ρ1 π Barnard 92 ο χ σ M25 M24 STARS M23 ν β κ All-in-one introduction ALL NEW MAPS WITH: to the night sky 42,000 more stars (87,000 plotted down to magnitude 8.5) AND 150+ more deep-sky objects (more than 1,200 total) The Eagle Nebula (M16) combines a dark nebula and a star cluster. In 100+ this intense region of star formation, “pillars” form at the boundaries spectacular between hot and cold gas. You’ll find this object on Map 14, a celestial portion of which lies above. photos PLUS: How to observe star clusters, nebulae, and galaxies AS2-CV0610.indd 1 6/10/10 4:17 PM NEW EDITION! AtlAs Tour the night sky of the The staff of Astronomy magazine decided to This atlas presents produce its first star atlas in 2006. -
Rochester Skies
A S T R O N O M Y Rochester Skies First Newsletter ¨ Freezing Star-Party ¨ March Over Rochester ¨ Constellation Prize Rochester Astronomy Club Newsletter Issue #1 Winter ‘06 RAC Grows Up Constellation Prize Star Party The Rochester Astron- From our favorite Our coldest month omy Club has been meeting segment, turns out one of growing. As the size Randy Hemann will our best attended increases, so do the lead us by the optics Star Parties. Dean possibilities. If you are through the constel- Johnson fills us in on curious what RAC is lation Hydra, point- Eagle Bluff January. all about, take a look at ing out deep sky gems “Who We Are...” along the way. Page 1 Page 3 Page 4 ing to feel some growing pains. First Newsletter We appreciate feedback and Rochester Skies Welcome to the first newsletter of the encourage participation. If you Contents Rochester Astronomy Club. We hope have ideas, articles or images, March Over Rochester Pg 2 you find it fun and informative. You please submit them. Hunting the Hunter Pg 8 might even want to keep it around— It’s a Little Known Fact Pg 11 could be worth something someday! “Rochester Skies In the Beginning is a newsletter by the Pg 11 We hope this newsletter will be- club, for the club.” Satellite Satellbright Pg 10 come a source of anticipation for Up-Coming Events Pg 12 our members. As we ramp up If you have questions, comments or material for the Rochester Skies newsletter, our editorial process, we are go- please contact our lead editor Duane Deal at [email protected] A. -
Educator's Guide: Orion
Legends of the Night Sky Orion Educator’s Guide Grades K - 8 Written By: Dr. Phil Wymer, Ph.D. & Art Klinger Legends of the Night Sky: Orion Educator’s Guide Table of Contents Introduction………………………………………………………………....3 Constellations; General Overview……………………………………..4 Orion…………………………………………………………………………..22 Scorpius……………………………………………………………………….36 Canis Major…………………………………………………………………..45 Canis Minor…………………………………………………………………..52 Lesson Plans………………………………………………………………….56 Coloring Book…………………………………………………………………….….57 Hand Angles……………………………………………………………………….…64 Constellation Research..…………………………………………………….……71 When and Where to View Orion…………………………………….……..…77 Angles For Locating Orion..…………………………………………...……….78 Overhead Projector Punch Out of Orion……………………………………82 Where on Earth is: Thrace, Lemnos, and Crete?.............................83 Appendix………………………………………………………………………86 Copyright©2003, Audio Visual Imagineering, Inc. 2 Legends of the Night Sky: Orion Educator’s Guide Introduction It is our belief that “Legends of the Night sky: Orion” is the best multi-grade (K – 8), multi-disciplinary education package on the market today. It consists of a humorous 24-minute show and educator’s package. The Orion Educator’s Guide is designed for Planetarians, Teachers, and parents. The information is researched, organized, and laid out so that the educator need not spend hours coming up with lesson plans or labs. This has already been accomplished by certified educators. The guide is written to alleviate the fear of space and the night sky (that many elementary and middle school teachers have) when it comes to that section of the science lesson plan. It is an excellent tool that allows the parents to be a part of the learning experience. The guide is devised in such a way that there are plenty of visuals to assist the educator and student in finding the Winter constellations. -
List of Easy Double Stars for Winter and Spring = Easy = Not Too Difficult = Difficult but Possible
List of Easy Double Stars for Winter and Spring = easy = not too difficult = difficult but possible 1. Sigma Cassiopeiae (STF 3049). 23 hr 59.0 min +55 deg 45 min This system is tight but very beautiful. Use a high magnification (150x or more). Primary: 5.2, yellow or white Seconary: 7.2 (3.0″), blue 2. Eta Cassiopeiae (Achird, STF 60). 00 hr 49.1 min +57 deg 49 min This is a multiple system with many stars, but I will restrict myself to the brightest one here. Primary: 3.5, yellow. Secondary: 7.4 (13.2″), purple or brown 3. 65 Piscium (STF 61). 00 hr 49.9 min +27 deg 43 min Primary: 6.3, yellow Secondary: 6.3 (4.1″), yellow 4. Psi-1 Piscium (STF 88). 01 hr 05.7 min +21 deg 28 min This double forms a T-shaped asterism with Psi-2, Psi-3 and Chi Piscium. Psi-1 is the uppermost of the four. Primary: 5.3, yellow or white Secondary: 5.5 (29.7), yellow or white 5. Zeta Piscium (STF 100). 01 hr 13.7 min +07 deg 35 min Primary: 5.2, white or yellow Secondary: 6.3, white or lilac (or blue) 6. Gamma Arietis (Mesarthim, STF 180). 01 hr 53.5 min +19 deg 18 min “The Ram’s Eyes” Primary: 4.5, white Secondary: 4.6 (7.5″), white 7. Lambda Arietis (H 5 12). 01 hr 57.9 min +23 deg 36 min Primary: 4.8, white or yellow Secondary: 6.7 (37.1″), silver-white or blue 8. -
Three Naked Eye Galaxies? Dave Eagle
Three Naked Eye Galaxies? Dave Eagle. Eagleseye Observatory. Star hopping to M31, The Great Andromeda Galaxy. In the autumn sky in the northern hemisphere, the constellations of Perseus and Andromeda are very proudly on display, located on the meridian around midnight, and visible from most of the world. The Great Square of Pegasus is a distinct asterism of four stars. Using just your naked eye, find this square of stars. Incidentally, the top left star (all instructions are now as seen from the northern hemisphere) Sirrah, is now actually Alpha Andromedae. From this square of stars take the top edge of the square and carry the line on towards the left (east) and up. Just under half the distance of the top of the square, you should come to another reasonably bright star. Slightly left and up again, taking a slightly longer journey, you will come to another star of similar brightness. This is Mirach or Beta Andromedae. When you have found this star, turn 90 degrees to the right. You will then see two fairly bright stars leading away. Aim for the second star and gaze at this star. If your skies are reasonably dark, just above and to the right of the second star you should be able to see a faint smudge. This marks the location of M31, The Andromeda Galaxy. In five hops we have found our quarry. Figure 1 – Star hopping from Sirrah to The Andromeda Galaxy. This is the most distant object you can see with the naked eye and is almost 2.5 million light years away. -
Starview Visible Object Listing For: March 15, 2017 Local Time
StarView Visible Object Listing for: March 15, Local Time (Z5): Lat: Minimum Criteria: 2017 21:30 41.5 Elev: 5° / Mag: 6 Sidereal Time: Lon: Sep: 10 arcmin / Size: 08:39 81.5 2 arcsec Name Con Type Mag Sep/Size Elev Spiral M31 Andromeda Galaxy And 3.44 190 arcmin 9° Galaxy Open 30x75 Little Fish Aur 4.5 50° Cluster arcmin Double kappa Bootes Asellus Tertius Boo 4.5, 6.6 13.4 arcsec 35° Star Double 0.8, 99 Zeta Bootis Boo 4.6, 4.5 9° Star arcsec Double Iota Cancri Can 4.2, 6.6 30.6 arcsec 77° Star Open M44 Beehive Cluster, Praesepe Can 3.7 95 arcmin 68° Cluster Double Eta Cassiopeiae Achrid Cas 3.4, 7.5 13 arcsec 22° Star Delta Cephei Cep Star 4 13° Double 145 Canis Majoris h3945 Cma 4.8, 6.8 27 arcsec 22° Star Beta Canis Majoris Murzim Cma Star 2 23° Delta Canis Majoris Wezen Cma Star 1.8 19° Eta Canis Majoris Aludra Cma Star 2.4 17° Gamma Canis Majoris Cma Star 4.1 29° Muliphein Open M41 Cma 4.5 38 arcmin 22° Cluster Zeta Canis Majoris Phurud Cma Star 3.02 12° Double 24 Comae Berenices Com 5.2, 6.7 20.3 arcsec 35° Star Double 35 Comae Berenices Com 4.91 29 arcsec 33° Star Alpha Canum Venaticorum Cor CVn Double 2.9, 5.5 19.6 arcsec 42° Caroli Star Y Cvn La Superba Cvn Star 5 46° Double Nu Draconis Dra 4.88 63.4 arcsec 14° Star Omicron 2 Eridani Keid, Beid, Double Eri 4.5.