... Note that in the low-mass model, the ``secondary'' is more massive than the visible ``primary''; however, we shall follow the convention used in most of the Aurig? literature and continue to refer to the F star as the primary because it is clearly the primary source of luminosity of the system. Doppler shifts of absorption lines seen during eclipse imply an orbital velocity at the edge of the secondary more compatible with the low-mass model (Saito et al. ...

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

... This is usually defined as the direction pointing toward the center of the primary body. ... NODE: The place where the plane of one orbit crosses the plane of another. ... ORBITAL PLANE: The flat surface that would result if every point on the orbit of a body was connected to the center of its primary. ... PENUMBRA: The edge of the primary body's shadow. ... PERIOD : The time required for one body to orbit the primary body. ... PROBE: A vessel designed to pass and observe an astronomical object. ...

Astrophysics Group . Cavendish Laboratory . Department of Physics > Astrophysics . ... This workshop will discuss possible future CMB ground-based experiments, aimed particularly at detection of primordial B-mode polarisation and at imaging of the Sunyaev-Zel'dovich effect. ... Last modified: 9 August 2009 . 2009 Astrophysics Group, Department of Physics, Cavendish Laboratory, University of Cambridge . ...

... xmmtrack . ... xmmtrack is an interactive IDL application that visualizes the orbit and attitude data in an ODF in the form of a 3-D animation sequence. The presented scenery includes an astronomically accurate simulation of the Earth-Sun system plus the actual and predicted trajectory of the XMM satellite on its path around the Earth. ... Please note: XMM's orbit is highly time variable and the predicted orbit will significantly deviate from the actual trajectory if the reference epochs differ. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . des actualitУ?s . ... les plus belles images de l'Univers dУ?cryptУ?es pour vous . ... des conseils pour dУ?buter et pratiquer l'astronomie . ... Accueil Lire/Voir/Ecouter Lire/Voire/Ecouter . ... Lire/Voir/Ecouter . ... Le rУ?dacteur en chef de Ciel & Espace donne des conseils pУ?dagogiques pour observer la Lune et le Soleil d'une part, les У?toiles et les planУ?tes d'autre part. ...

... Home Articles Comet Hyakutake: The Great ?Earthgrazing? Comet of 1996 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... Comet Hyakutake: The Great "Earthgrazing" Comet of 1996 . A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Contact A Problem of an estimation of accuracy of the asteroid CCD observations . The Minor Planet Center supported by the Interntional Astronomical Union is the main office for keeping observational data of the small Solar System bodies and their investigations. ... At Pulkovo Observatory we are estimating an accuracy of the CCD asteroid observations obtained by amateurs and professional astronomers all over the World using the MPC database. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Projects . ... 2/3-m Telescope . ... Irvin M. Winer . ... Site . ... Winer . ... Site Map . ... In 1995, Corning sold to us a 1.5-m (60-inch) telescope mirror blank made using the process to make the Ultra Low Expansion, or ULE , glass. ... That is, the telescope containing this blank must remain at our facility. ... Sonoita . Arizona 85637-0797 . ... 2013 Winer Observatory. ...

... ARTICLE: The Adventurous Search For The Astronomical Unit . ... Kepler himself had suggested to use the rare occasions of Venus transiting (crossing) the solar disk to measure our distance to the planet. ... Due to the orbital inclination of Venus against the ecliptic of 3.5°, a Venus transit is so rare that it happens only at intervals of 121.5 years, 8 years, 105.5 years, 8 years and so on. ... Crabtree witnessing the transit of Venus 1639 . ... Transits of Venus - The Quest for the Solar Parallax...

Высокое спектральное разрешение, 200000>R>20000 . HIRES - эшелле спектрограф 10м телескопа Keck . HRS - оптоволоконный эшелле спектрограф 9м телескопа HET . ... CELESTIA - оптоволоконный эшелле спектрограф 9м телескопа SALT . PEPSI - оптоволоконный эшелле спектрограф-поляриметр 2х8.4м телескопа LBT . ... HROS - оптоволоконный эшелле спектрограф 8.1м телескопа Gemini S . ... UCLES и UHRF - эшелле спектрографы высокого и сверхвысокого разрешения 3.5м телескопа ААТ . ...

... Observatory . ... THE HISTORY OF AAAP . ... After introductory remarks by Robert Sanders, founder of the Association, it was moved that the name of the organization be Amateur Astronomers Association of Princeton. ... 2/72 First issue of Sidereal Times, so named by Editor Roxanne Tobin. ... 5/72 Election of officers: Norman Sperling, Director; John Church, Assist. ... Sidereal Times, John gives the following report: . ... Sidereal Times.) ... Amateur Astronomers Association of Princeton Т? 2015. ...

Characterization of Precipitable Water Vapor at the TMT Candidate Sites in Northern Chile: The Importance of Surface Data A. OtАrola T. Travouillon, M. SchЖck, S. Els, R. Riddle W. Skidmore, R. Dahl, D. Naylor, R. Querel Kislovodsk , October 4-9 , 2010 1 Outline Location of sites tested by TMT in northern Chile Synoptic-scale meteorological conditions Monitoring of ... Kislovodsk, October 4-9, 2010 16 Results: Overall & Seasonal Site Alt. (m) PWV (mm) GOES PWV (mm) Surf. ...