Starview Visible Object Listing For: August 15, 2017
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
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. -
August 13 2016 7:00Pm at the Herrett Center for Arts & Science College of Southern Idaho
Snake River Skies The Newsletter of the Magic Valley Astronomical Society www.mvastro.org Membership Meeting President’s Message Saturday, August 13th 2016 7:00pm at the Herrett Center for Arts & Science College of Southern Idaho. Public Star Party Follows at the Colleagues, Centennial Observatory Club Officers It's that time of year: The City of Rocks Star Party. Set for Friday, Aug. 5th, and Saturday, Aug. 6th, the event is the gem of the MVAS year. As we've done every Robert Mayer, President year, we will hold solar viewing at the Smoky Mountain Campground, followed by a [email protected] potluck there at the campground. Again, MVAS will provide the main course and 208-312-1203 beverages. Paul McClain, Vice President After the potluck, the party moves over to the corral by the bunkhouse over at [email protected] Castle Rocks, with deep sky viewing beginning sometime after 9 p.m. This is a chance to dig into some of the darkest skies in the west. Gary Leavitt, Secretary [email protected] Some members have already reserved campsites, but for those who are thinking of 208-731-7476 dropping by at the last minute, we have room for you at the bunkhouse, and would love to have to come by. Jim Tubbs, Treasurer / ALCOR [email protected] The following Saturday will be the regular MVAS meeting. Please check E-mail or 208-404-2999 Facebook for updates on our guest speaker that day. David Olsen, Newsletter Editor Until then, clear views, [email protected] Robert Mayer Rick Widmer, Webmaster [email protected] Magic Valley Astronomical Society is a member of the Astronomical League M-51 imaged by Rick Widmer & Ken Thomason Herrett Telescope Shotwell Camera https://herrett.csi.edu/astronomy/observatory/City_of_Rocks_Star_Party_2016.asp Calendars for August Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 New Moon City Rocks City Rocks Lunation 1158 Castle Rocks Castle Rocks Star Party Star Party Almo, ID Almo, ID 7 8 9 10 11 12 13 MVAS General Mtg. -
Orbital Elements of Double Stars
Orbital elements of double stars: ADS 1548 Marco Scardia, Jean-Louis Prieur, Luigi Pansecchi, Robert Argyle, Josefina Ling, Eric Aristidi, Alessio Zanutta, Lyu Abe, Philippe Bendjoya, Jean-Pierre Rivet, et al. To cite this version: Marco Scardia, Jean-Louis Prieur, Luigi Pansecchi, Robert Argyle, Josefina Ling, et al.. Orbital elements of double stars: ADS 1548. 2018, pp.1. hal-02357208 HAL Id: hal-02357208 https://hal.archives-ouvertes.fr/hal-02357208 Submitted on 23 Nov 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. INTERNATIONAL ASTRONOMICAL UNION COMMISSION G1 (BINARY AND MULTIPLE STAR SYSTEMS) DOUBLE STARS INFORMATION CIRCULAR No. 194 (FEBRUARY 2018) NEW ORBITS ADS Name P T e Ω(2000) 2018 Author(s) α2000δ n a i ! Last ob. 2019 1548 A 819 AB 135y4 2011.06 0.548 153◦8 39◦7 000161 SCARDIA 01570+3101 2◦6587 000424 50◦5 189◦7 2017.833 49.4 0.163 et al. (*) - HDS 333 49.54 1981.14 0.60 252.6 253.8 0.542 TOKOVININ 02332-5156 7.2665 0.413 57.4 150.9 2018.073 255.7 0.519 - COU 691 61.76 1964.53 0.059 68.6 276.2 0.109 DOCOBO 03423+3141 5.8290 0.160 -
Astrometric Measurements of Seven Double Stars, September 2011 Report
Vol. 8 No. 1 January 1, 2012 Journal of Double Star Observations Page 40 Astrometric Measurements of Seven Double Stars, September 2011 Report Joseph M. Carro Cuesta College San Luis Obispo, California Abstract: From my residence in Paso Robles, California, measurements of the separation and position angle of seven double stars were made. Listed in chronological order, the dou- ble stars were Zeta Ursae Majoris, Zeta Lyrae, Epsilon Delphini, SAO 105104 in Sagitta, STF 2840 in Cepheus, 61 Cygni, and 17 Cygni. The two goals of this project were to meas- ure the position angle and separation of the aforementioned double stars, and to learn the necessary techniques to conduct this research. Methodology My observations were made from my home in Paso Robles, California (located at approximately 35o37’36” N and 120o41’24” W) using a Celestron model CPC 1100 telescope (Figure 1). The telescope is computerized, motorized, and was fitted with a Celestron Micro Guide 12.5 mm astrometric eye- piece. The telescope is of Schmidt-Cassegrain de- sign, with aperture of 11 inches on an alt-azimuth mount. The manufacturer reports a focal length of 2,800 mm. The Micro Guide eyepiece was oriented with the celestial coordinate system using the primary star of the double star under study. The primary star was positioned on the mark 30, the drive was disabled, and the star was permitted to drift to the outer cir- cle. The scale was rotated until the star lay on the 270 degree mark. The accuracy of this setting was verified by positioning the primary star on the 90 degree mark of the outer circular scale, and allowing the star to drift to the 270 degree mark. -
Double and Multiple Star Measurements in the Northern Sky with a 10” Newtonian and a Fast CCD Camera in 2006 Through 2009
Vol. 6 No. 3 July 1, 2010 Journal of Double Star Observations Page 180 Double and Multiple Star Measurements in the Northern Sky with a 10” Newtonian and a Fast CCD Camera in 2006 through 2009 Rainer Anton Altenholz/Kiel, Germany e-mail: rainer.anton”at”ki.comcity.de Abstract: Using a 10” Newtonian and a fast CCD camera, recordings of double and multiple stars were made at high frame rates with a notebook computer. From superpositions of “lucky images”, measurements of 139 systems were obtained and compared with literature data. B/w and color images of some noteworthy systems are also presented. mented double stars, as will be described in the next Introduction section. Generally, I used a red filter to cope with By using the technique of “lucky imaging”, seeing chromatic aberration of the Barlow lens, as well as to effects can strongly be reduced, and not only the reso- reduce the atmospheric spectrum. For systems with lution of a given telescope can be pushed to its limits, pronounced color contrast, I also made recordings but also the accuracy of position measurements can be with near-IR, green and blue filters in order to pro- better than this by about one order of magnitude. This duce composite images. This setup was the same as I has already been demonstrated in earlier papers in used with telescopes under the southern sky, and as I this journal [1-3]. Standard deviations of separation have described previously [1-3]. Exposure times varied measurements of less than +/- 0.05 msec were rou- between 0.5 msec and 100 msec, depending on the tinely obtained with telescopes of 40 or 50 cm aper- star brightness, and on the seeing. -
Events: General Meeting : Monday, May 4, 2015 at the Temecula Library, 30600 Pauba Rd, Rm
The monthly newsletter of the Temecula Valley Astronomers May 2015 Events: General Meeting : Monday, May 4, 2015 at the Temecula Library, 30600 Pauba Rd, Rm. B at 7 pm. Tim Deardorff with his What's Up in the night sky and Curtis Croulet presents the “Illustrated history of the building of Palomar Observatory ”. Curtis is a Master Docent at the Observatory. For the latest on Star Parties, check the web page. APOD: Ring Galaxy AM 0644-741 from Hubble Image Credit: Hubble Heritage Team (AURA / STScI), J. Higdon (Cornell) ESA, NASA WHAT’S INSIDE THIS MONTH: General information: Subscription to the TVA is included in the annual $25 membership (regular members) donation ($9 student; $35 Cosmic Comments family). by President Mark Baker Looking Up President: Mark Baker 951-691-0101 by Curtis Croulet ([email protected]) Art's Night Out Vice President & Facebook: Tim Deardorff 951-775-1036 ([email protected]) by Art Cobb Outreach: John Garrett 951-609-3021 Art's Night Out Reloaded (May 2004) ([email protected]) by Art Cobb Treasurer: Curtis Croulet ([email protected]) For Sale or Trade Secretary: Deborah Cheong ([email protected]) Club Librarian: Bob Leffler 951-541-5400 Send newsletter submissions to Mark DiVecchio ([email protected]) ([email protected]) by the 20th of the month for the next month's issue. Star Party Coordinator: Deborah Cheong ([email protected]) Address renewals or other correspondence to: Like us on Facebook Temecula Valley Astronomers PO Box 1292 Murrieta, CA 92564 Mailing List: [email protected] -
Optical Counterparts of ROSAT X-Ray Sources in Two Selected Fields at Low
Astronomy & Astrophysics manuscript no. sbg˙comsge˙ed c ESO 2018 October 16, 2018 Optical counterparts of ROSAT X-ray sources in two selected fields at low vs. high Galactic latitudes J. Greiner1, G.A. Richter2 1 Max-Planck-Institut f¨ur extraterrestrische Physik, 85740 Garching, Germany 2 Sternwarte Sonneberg, 96515 Sonneberg, Germany Received 14 October 2013 / Accepted 12 August 2014 ABSTRACT Context. The optical identification of large number of X-ray sources such as those from the ROSAT All-Sky Survey is challenging with conventional spectroscopic follow-up observations. Aims. We investigate two ROSAT All-Sky Survey fields of size 10◦× 10◦ each, one at galactic latitude b = 83◦ (26 Com), the other at b = –5◦ (γ Sge), in order to optically identify the majority of sources. Methods. We used optical variability, among other more standard methods, as a means of identifying a large number of ROSAT All- Sky Survey sources. All objects fainter than about 12 mag and brighter than about 17 mag, in or near the error circle of the ROSAT positions, were tested for optical variability on hundreds of archival plates of the Sonneberg field patrol. Results. The present paper contains probable optical identifications of altogether 256 of the 370 ROSAT sources analysed. In partic- ular, we found 126 AGN (some of them may be misclassified CVs), 17 likely clusters of galaxies, 16 eruptive double stars (mostly CVs), 43 chromospherically active stars, 65 stars brighter than about 13 mag, 7 UV Cet stars, 3 semiregular resp. slow irregular variable stars of late spectral type, 2 DA white dwarfs, 1 Am star, 1 supernova remnant and 1 planetary nebula. -
Astronomical Coordinate Systems
Appendix 1 Astronomical Coordinate Systems A basic requirement for studying the heavens is being able to determine where in the sky things are located. To specify sky positions, astronomers have developed several coordinate systems. Each sys- tem uses a coordinate grid projected on the celestial sphere, which is similar to the geographic coor- dinate 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 The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the most closely related to the geographic coordinate system because they use the same funda- mental plane and poles. The projection of the Earth’s equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles onto the celestial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate sys- tems: the geographic system is fixed to the Earth and 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 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. -
A L B I R E O 1999
XIX. évfolyam, 2. szám 1999. június ALBIREO Alapította: Szentmártoni Béla Szerkeszti: Juhász Tibor ALBIREO MAGYAR ÉGHAJLATVÁLTOZÁST AMATÕRCSILLAGÁSZ KLUB MEGFIGYELÕ HÁLÓZAT Zalaegerszeg, Nemzetõr u. 8. Vác, Pf. 184. H-8900 (Hungary) H-2234 (Hungary) e-mail: [email protected] e-mail: [email protected] http://alpha.dfmk.hu/~albireo CÍMLAPUNKON: Csillagtúra a Cygnus-ban - a cikk illusztrációja TARTALOM CONTENTS Nap (Zelkó Z.) 2 Sun Observations 2 Bótz Zs.: Hogyan deríthetjük fel a How Can We Found the Sources savas esõ forrásait? 6 of the Acid Rain? 6 A szennyezõ anyagok sorsa Accumulation of the Pollutants a táplálékláncban 8 in the Food-Chain 8 C.A. Wood: A Plato titkai 11 The Mysteries of Plato 11 Üstökösök 12 Comet Observations 12 P. Harrington: Kedvenc aszterizmusaim 13 My Favorite Asterisms 13 Juhász T.: Baseball-pálya a Cygnus-ban 16 The Cygnus Baseball Diamond 16 A. MacRobert: Csillagtúra a Cygnus-ban 18 A Cygnus Star-Hop 18 Kettõscsillagok 20 Double Star Observations 20 Észlelõ amatõrcsillagászok és amatõrmete- Albireo is the circulaire of the Hungarian Albi- orológusok körlevele. Az amatõrök megfigye- reo Amateur Astronomy Society and the Hun- léseikért cserébe kapják. Más érdeklõdõk a garian Climate Changes Observations Network. szerkesztõ címén rendelhetik meg. Megfigyelési Subscription fee 10 USD or 20 DM for a year. tájékoztatók, csillagatlaszok, katalógusok is a Despite money order or cash exchange maga- szerkesztõtõl kérhetõk. zines or other publications are prefered. Kiadja: a Göncöl Alapítvány (Vác) és a Zrínyi Miklós Gimnázium (Zalaegerszeg) Felelõs kiadó: Kiszel Vilmos A kiadványt Zalaegerszeg Megyei Jogú Város Önkormányzatának Közgyûlése támogatja. NAP Összeállította: Zelkó Zoltán 1998 elsõ félévében már igazán nem panasz- a foltok, jelezvén az aktivitás vizsgált idõszakon kodhattak észlelõink, bõven akadt látnivaló a is túlmutató, gyors erõsödését. -
Meteor 23. Évf. 6. Sz. (1993.)
ROVATVEZETŐINK: ■ NAP Iskum József meteor Budapest, Rózsa u. 48. 1041 ■ HOLD A Magyar Csillagászati Egyesület Kocsis Antal lapja Balatonkenese, Kossuth u. 2/a. 8174 Journal of the Hungarian Astronomical Association ■ BOLYGÓK Vincze Iván Redaction: Pécs, Aidinger J. u. 15. 7632 H-1461 Budapest, P.0. Box 219, Hungary ■ ÜSTÖKÖSÖK HU ISSN 0133-249X Sárneczky Krisztián Budapest, Kádár u. 9-11. 1132 Tel.: (1)-153-4902 A Meteor előfizetési díja 1993-ra ■ METEOROK (nem tagok számára) 800 Ft + ÁFA Tepliczky István Tata, Baji út 42. 2890 Évközben i előfizetés (tagdíjbefizetés) ■ CSILLAGFEDÉSEK esetén a számokat visszamenőleg Szabó Sándor megküldjük. Sopron, Baross u. 12. 9400 ■ KETTŐSCSILLAGOK Főszerkesztő: Ladányi Tamás Mizser Attila Balatonfűzfő, Balaton krt. 71. 8175 Tel.: (80J-51-744 Olvasószerkesztők: ■ VÁLTOZÓCSILLAGOK Csaba György Gábor Mizser Attila Dr. Kolláth Zoltán Budapest, Pf. 219. 1461 Tepliczky István Tel.: (1 )-186-2313 ■ MÉLY-ÉG OBJEKTUMOK A Magyar Csillagászati Egyesület és a Papp Sándor szerkesztőség postacíme: Kecskemét, Csokonai u. 1. 6000 Budapest, Pf. 219. 1461 ■ MESSIER KLUB Nagy Zoltán Antal Felelős kiadó az MCSE elnöke. Budapest, Corvin krt. 49. 1192 Megjelenik ■ SZABADSZEMES JELENSÉGEK a Pro Renovadna Cultura Hungáriáé Keresztúri Ákos Alapítvány támogatásával Budapest, Komjády B. u. 1. 1023 Tel.: (1)-115-6772 ■ CSILLAGÁSZATTÖRTÉNET Keszthelyi Sándor MAGYAR Pécs, Alkotmány u. 3. 7624 CSILLAGÁSZATI ■ TÁVCSŐKÉSZÍTÉS EGYESÜLET Dán András Az egyesületi tagság formái (1993): Etyek, Alsóhegy u. 7. 2091 — rendes tagsági díj (illetmény: ■ SZÁMÍTÁSTECHNIKA Meteor csili, évkönyv) 600 Ft Heitler Gábor Piliscsaba, Egyetem út 5. 2081 — pártoló tagsági díj (ill.: Meteor + Meteor csili, évkönyv) 1200 Ft A BESZÁMOLÓK BEKÜLDÉSE — örökös pártoló tagdíj 30000 Ft MINDEN HÓ 6-áig! Tartalom Contents XXIII. -
A Survey of Active Galaxies at Tev Photon Energies with the HAWC Gamma-Ray Observatory
Draft version September 22, 2020 Typeset using LATEX default style in AASTeX63 A survey of active galaxies at TeV photon energies with the HAWC gamma-ray observatory A. Albert,1 C. Alvarez,2 J.R. Angeles Camacho,3 J.C. Arteaga-Velazquez,´ 4 K.P. Arunbabu,5 D. Avila Rojas,3 H.A. Ayala Solares,6 V. Baghmanyan,7 E. Belmont-Moreno,3 S.Y. BenZvi,8 C. Brisbois,9 K.S. Caballero-Mora,2 T. Capistran´ ,10 A. Carraminana~ ,10 S. Casanova,7 U. Cotti,4 J. Cotzomi,11 S. Coutino~ de Leon´ ,10 E. De la Fuente,12 B.L. Dingus,1 M.A. DuVernois,13 M. Durocher,1 J.C. D´ıaz-Velez´ ,12 K. Engel,9 C. Espinoza,3 K.L. Fan,9 M. Fernandez´ Alonso,6 H. Fleischhack,14 N. Fraija,15 A. Galvan-G´ amez,´ 15 D. Garc´ıa,3 J.A. Garc´ıa-Gonzalez´ ,3 F. Garfias,15 M.M. Gonzalez´ ,15 J.A. Goodman,9 J.P. Harding,1 S. Hernandez´ ,3 B. Hona,14 D. Huang,14 F. Hueyotl-Zahuantitla,2 P. Huntemeyer,¨ 14 A. Iriarte,15 A. Jardin-Blicq,16, 17, 18 V. Joshi,19 D. Kieda,20 G.J. Kunde,1 A. Lara,5 W.H. Lee,15 H. Leon´ Vargas,3 J.T. Linnemann,21 A.L. Longinotti,10 G. Luis-Raya,22 J. Lundeen,21 K. Malone,1 O. Mart´ınez,11 I. Martinez-Castellanos,9 J. Mart´ınez-Castro,23 J.A. Matthews,24 P. Miranda-Romagnoli,25 J.A. Morales-Soto,4 E. Moreno,11 M. -
Starview Visible Object Listing For: April 15, 2017 Local Time (Z4
StarView Visible Object Listing for: April 15, Local Time (Z4): Lat: Minimum Criteria: 2017 21:30 41.5 Elev: 5° / Mag: 6 Sidereal Time: Lon: Sep: 10 arcmin / Size: 2 09:41 81.5 arcsec Name Con Type Mag Sep/Size Elev 30x75 Little Fish Aur Open Cluster 4.5 39° arcmin kappa Bootes Asellus Tertius Boo Double Star 4.5, 6.6 13.4 arcsec 44° 0.8, 99 Zeta Bootis Boo Double Star 4.6, 4.5 20° arcsec Iota Cancri Can Double Star 4.2, 6.6 30.6 arcsec 73° M44 Beehive Cluster, Praesepe Can Open Cluster 3.7 95 arcmin 65° Eta Cassiopeiae Achrid Cas Double Star 3.4, 7.5 13 arcsec 17° Delta Cephei Cep Star 4 10° 145 Canis Majoris h3945 Cma Double Star 4.8, 6.8 27 arcsec 17° Beta Canis Majoris Murzim Cma Star 2 15° Delta Canis Majoris Wezen Cma Star 1.8 13° Eta Canis Majoris Aludra Cma Star 2.4 12° Gamma Canis Majoris Cma Star 4.1 22° Muliphein M41 Cma Open Cluster 4.5 38 arcmin 16° 24 Comae Berenices Com Double Star 5.2, 6.7 20.3 arcsec 46° 35 Comae Berenices Com Double Star 4.91 29 arcsec 45° Alpha Canum Venaticorum CVn Double Star 2.9, 5.5 19.6 arcsec 53° Cor Caroli Y Cvn La Superba Cvn Star 5 57° Nu Draconis Dra Double Star 4.88 63.4 arcsec 20° 4, 71 Alpha Geminorum Castor Gem Double Star 1.9, 2.9 63° arcsec M35 Collinder 82 Gem Open Cluster 5.3 28 arcmin 43° Globular M13 Hercules Cluster Her 5.8 20 arcmin 14° Cluster M48 Hyd Open Cluster 5.5 54 arcmin 39° Gamma Leporis Lep Double Star 3.7, 6.3 96 arcsec 6° 19 Lyncis Struve 1062 Lyn Double Star 5.6 14.8 arcsec 64° 7.3, 10 Beta Monocerotis Mon Double Star 4.7, 5.2 25° arcsec