Observations Calendar 2021-22
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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. -
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. -
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 -
Instruction Manual
iOptron® GEM28 German Equatorial Mount Instruction Manual Product GEM28 and GEM28EC Read the included Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument and uses a magnetic gear meshing mechanism. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount. You must hold the mount firmly when disengaging or adjusting the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper gear meshing/slippage will not be covered by iOptron’s limited warranty. If you have any questions please contact us at [email protected] WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while observing. 2 Table of Content Table of Content ................................................................................................................................................. 3 1. GEM28 Overview .......................................................................................................................................... 5 2. GEM28 Terms ................................................................................................................................................ 6 2.1. Parts List ................................................................................................................................................. -
Starview Visible Object Listing For: May 15, 2017 Local
StarView Visible Object Listing for: May 15, Local Time (Z4): Lat: Minimum Criteria: 2017 21:30 41.5 Elev: 5° / Mag: 6 Sidereal Time: Lon: Sep: 10 arcmin / Size: 2 11:39 81.5 arcsec Name Con Type Mag Sep/Size Elev Little Fish Aur Open Cluster 4.5 30x75 arcmin 18° 4.5, kappa Bootes Asellus Tertius Boo Double Star 13.4 arcsec 62° 6.6 4.6, Zeta Bootis Boo Double Star 0.8, 99 arcsec 42° 4.5 4.2, Iota Cancri Can Double Star 30.6 arcsec 53° 6.6 M44 Beehive Cluster, Praesepe Can Open Cluster 3.7 95 arcmin 47° 3.4, Eta Cassiopeiae Achrid Cas Double Star 13 arcsec 10° 7.5 Delta Cephei Cep Star 4 11° 5.2, 24 Comae Berenices Com Double Star 20.3 arcsec 64° 6.7 35 Comae Berenices Com Double Star 4.91 29 arcsec 64° Alpha Canum Venaticorum 2.9, CVn Double Star 19.6 arcsec 75° Cor Caroli 5.5 Y Cvn La Superba Cvn Star 5 77° 31 Cygni Omicron 1 Cyg Double Star 3.8 9° 32 Cygni Omicron 2 Cyg Double Star 3.98 10° Nu Draconis Dra Double Star 4.88 63.4 arcsec 34° 1.9, Alpha Geminorum Castor Gem Double Star 4, 71 arcsec 41° 2.9 M35 Collinder 82 Gem Open Cluster 5.3 28 arcmin 21° Globular M13 Hercules Cluster Her 5.8 20 arcmin 33° Cluster M48 Hyd Open Cluster 5.5 54 arcmin 23° 19 Lyncis Struve 1062 Lyn Double Star 5.6 14.8 arcsec 47° Epsilon Lyrae The Double Lyr Double Star 4.6, 5, 200,150,64 15° Double 6 arcsec Caldwell 50 Mon Open Cluster 4.8 24 arcmin 13° Christmas Tree Cone Nebula Mon Nebula 3.9 20 arcmin 18° M50 Mon Open Cluster 5.9 16 arcmin 10° Beta Perseus Algol Per Double Star 2.1 5° Double Cluster Caldwell 14, 3.7, Per Open Cluster 60 arcmin 14° Chi Persei 3.8 M47 Pup Open Cluster 5.2 30 arcmin 11° 2.3, Zeta Ursae Majoris Mizar Uma Double Star 14 arcsec 68° 4.0 Alpha Ursae Minoris Polaris Umi Double Star 2.1, 9 18 arcsec 41° End of Listing: 28 of 134 Stars matched criteria Developer: Bruce Bream [email protected] Little Fish (Aur) RA: 5h 18m Mag(v): 4.5 Type: Open Cluster Dec: 33d 30m Size: 30x75 arcmin Distance: ly El: 18° / Az: 299° More than a dozen stars in this cluster. -
All Objects by Right Ascension For
All Objects in Turn Left at Orion , 5th edition (by Right Ascension) Page Name Constellation Type RA Dec. Chapter 188 Struve 3053 Cassiopeia Double Star 0 H 2.6 min. 66° 6' North 212 NGC 104, 47 Tucanae Tucana Globular Cluster 0 H 24.1 min −62° 58' South 193 NGC 129 Cassiopeia Open Cluster 0 H 29.8 min. 60° 14' North 215 Beta Tucanae Tucana Double Star 0 H 31.5 min. −62° 58' South 176 M110 (NGC 205), with M31 Andromeda Galaxy 0 H 40.3 min 41° 41' October–December 210 NGC 220 Tucana Open Cluster 0 H 40.5 min. −73° 24' South 210 NGC 222 Tucana Open Cluster 0 H 40.7 min. −73° 23' South 210 NGC 231 Tucana Open Cluster 0 H 41.1 min. −73° 21' South 176 M31, Andromeda Galaxy Andromeda Galaxy 0 H 42.7 min 41° 16' October–December 176 M32, companion of M31 Andromeda Galaxy 0 H 42.7 min 40° 52' October–December 192 NGC 225 Cassiopeia Open Cluster 0 H 43.4 min. 61° 47' North 210 NGC 249 Tucana Diffuse Nebula 0 H 45.5 min. −73° 5' South 210 NGC 261 Tucana Diffuse Nebula 0 H 46.5 min. −73° 6' South 174 NGC 247 Sculptor Galaxy 0 H 47.1 min −20° 46' October–December 210 NGC 265 Tucana Open Cluster 0 H 47.2 min. −73° 29' South 174 NGC 253 Sculptor Galaxy 0 H 47.5 min −25° 17' October–December 202 NGC 188 Cepheus Open Cluster 0 H 47.5 min. -
Properties of Members of Stellar Kinematic Groups and Stars with Circumstellar Dusty Debris Discs
UNIVERSIDAD AUTONOMA´ DE MADRID Facultad de Ciencias Departamento de F´ısica Teorica´ A spectroscopic study of the nearby late-type stellar population: Properties of members of stellar kinematic groups and stars with circumstellar dusty debris discs. PhD dissertation submitted by Jesus´ Maldonado Prado for the degree of Doctor in Physics Supervised by Dr. Carlos Eiroa de San Francisco Madrid, June 2012 UNIVERSIDAD AUTONOMA´ DE MADRID Facultad de Ciencias Departamento de F´ısica Teorica´ Estudio espectroscopico´ de la poblacion´ estelar fr´ıa cercana: Propiedades de estrellas en grupos cinematicos´ estelares y de estrellas con discos circunestelares de tipo debris. Memoria de tesis doctoral presentada por Jesus´ Maldonado Prado para optar al grado de Doctor en Ciencias F´ısicas Trabajo dirigido por el Dr. Carlos Eiroa de San Francisco Madrid, Junio de 2012 A mis padres y hermanos Agradecimientos La finalizaci´on de una tesis doctoral es siempre un momento para el balance y la reflexi´on. Conf´ıo que estas breves palabras sirvan de peque˜no reconocimiento a todas las personas que durante todo este largo, y no siempre f´acil, per´ıodo de tiempo han tenido a bien brindarme su ayuda, su apoyo y, en muchos casos, su simpat´ıa. A todos los que de alguna manera me habe´ıs ayudado, gracias. Las primeras palabras de estas notas deben ser para mi supervisor de tesis, Carlos Eiroa, por su confianza, su apoyo y dedicaci´on y sobre todo por esa mi- rada cr´ıtica tan suya que, desde siempre, ha tratado de transmitirme. A Benjam´ın Montesinos debo agradecerle muchas cosas, en particular su cercan´ıa y su forma de ser, a David Montes y a Raquel Mart´ınez, su esfuerzo y dedicaci´on. -
March 2005 Observatory (619) 766-9118 a Non-Profit Educational Association P.O
San Diego Astronomy Association Celebrating Over 40 Years of Astronomical Outreach Office (619) 645-8940 March 2005 Observatory (619) 766-9118 http://www.sdaa.org A Non-Profit Educational Association P.O. Box 23215, San Diego, CA 92193-3215 Combinations Changing at Tierra Del Sol! The combinations for the front gates, pedestrian gate, SDAA Business Meeting power and pump will change on March 13th, the day Next meeting will be held at: SKF Condition Monitoring after the Messier Marathon at Tierra Del Sol. The 5271 Viewridge Court new combination appears on the mailing label of this San Diego, CA 92123 March 8th at 7:00pm newsletter. Volunteers Needed For Beginner Program Next Program Meeting There is a move to start a new Beginner Program within the club. The program would teach people new to astronomy about what’s up there to view, how to find the objects, March 16th 7:00 pm and about the mounts and telescopes to view those objects. We need volunteers to Mission Trails Regional Park make this program happen. If you are interested in helping out with this project and Visitor and Interpretive Center could donate an hour per month of your time, contact Bob Austin at 1 Father Junipero Serra Trail [email protected] or (760) 787-1174 Need to pay your membership dues? Renew your subscription? There are 2 ways. • The easiest way is to go to http://www.sdaa.org and click on the CONTENTS Membership tab on the left. Then scroll down to the bottom and click March 2005 Vol XLI, Issue 03 Renew. -
June 2021 BRAS Newsletter
A JPL Image of surface of Mars, and JPL Ingenuity Helicioptor illustration. Monthly Meeting June 14th at 7:00 PM, in person at last!!! (Monthly meetings are on 2nd Mondays at Highland Road Park Observatory) You can also join this meeting via meet.jit.si/BRASMeet PRESENTATION: a demonstration on how to clean the optics of an SCT or refracting telescope. What's In This Issue? President’s Message Member Meeting Minutes Business Meeting Minutes Outreach Report Asteroid and Comet News Light Pollution Committee Report Globe at Night SubReddit and Discord BRAS Member Astrophotos Messages from the HRPO REMOTE DISCUSSION American Radio Relay League Field Day Observing Notes: Coma Berenices – Berenices Hair Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society BRAS YouTube Channel Baton Rouge Astronomical Society Newsletter, Night Visions Page 2 of 23 June 2021 President’s Message Spring is just flying by it seems. Already June, galaxy season is peeking and the nebulous treasures closer to the Milky Way are starting to creep into the late evening sky. And as a final signal of Spring, we have a variety of life creeping up at the observatory on Highland Road (and not just the ample wildlife that’s been pushed out of the bayou by the rising flood waters, either). Astronomy Day was pretty big success (a much larger crowd than showed up last spring, at any rate) and making good on the ancient prophecy, we began having meetings at HRPO once again. Thanks again to Melanie for helping us score such a fantastic speaker for our homecoming, too.