Lord Carrington determined the solar rotation rate by watching low-latitude sunspots back in the 1850s. He defined a fixed solar coordinate system that rotates in a sidereal frame every 25.38 days. ... Carrington coordinates are heliographic and measured in latitude and longitude in that rotating frame. Carrington Time is the rotation and longitude of the point on the Sun that is at the sub-terrestrial point. ... Bartels defined his calendar based on observations of daily geomagnetic activity. ...

... sin f = y / r . cos f = x / r . ... They are now viewed as new definitions of the sine and cosine, for the polar angle f given by x and y ( a slightly different way of formulating this definition is described further below ). ... sin 2 f + cos 2 f = 1 . ... Angle . ... Many trigonometry texts define the sine and cosine slightly differently, using the so-called unit circle . ... Then the distance AB ("the sine line") equals sin a , and the distance OA ("the cosine line") equals cos a . ...

... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

... It?s needs solution satellite?s orientation problem for defining location of sources of ionospheric emissions above Earth?s surface with necessary accuracy. There is possibility to define orientation of photometric devices by using TV images of star background. The CCD TV camera is designed for recording of images of star sky, Earth? limb and adjoining part of Earth? surface to fix the orbit point coordinates during the measurements by FAGOT and SICH-F devices. ...

... ATM Discussion Forum . Forums: . ... How to clean the rust on the quartz glass lens - flyingmelon - September 18, 2010 - 08:55 UTC . ... Depends - rick_crockett - May 26, 2008 - 03:52 UTC . ... Canon DSLR CONTROLLER USB SERIAL PORT - costas - October 31, 2007 - 16:02 UTC . ... Star Lap - berry - December 30, 2006 - 21:46 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

First results of X/S and X/Ka-band catalog combinations with full covariance information Andreas Iddink , Christopher Jacobs, Thomas Artz, Axel Nothnagel 22.09.2014 First results of S/X and X/Ka-band catalog combinations with full covariance information Andreas Iddink ­ 22.09.2014 Motivation Features of the ICRF2 ICRF2 (Defining- Sources ) 3414 ... Step: Import of the X/Ka catalog with full covariance information (Data provided by Christopher Jacobs et al. ...

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... The perceptron structure, on the basis of which the database is built, is defined by a number of the input and output parameters and a required accuracy. ... The output perceptron data are the expansion coefficients of the scattering matrix elements in series of the generalized spherical functions. ... As the cluster structure depends on the generation conditions the expansion coefficients were averaged over 5--7 realizations of the clusters (for N . ... is the coefficient number. ...

... Артикул: CL137251 . Бренд: Citilux (Дания) . Коллекция: Ямато . ... Размер упаковки, мм: 520x520x200 . ... Артикул - CL137251 ,Бренд - Citilux (Дания),Коллекция - Ямато ,Гарантия, месяцев - 24,Время изготовления, дней - 1,Рекомендуемые помещения - Гостиная, Кабинет, Прихожая, Спальня,Высота, мм - 220-1000,Диаметр, мм - 500, Размер упаковки, мм - 520x520x200,Цвет плафонов и подвесок - венге, неокрашенный,Цвет арматуры - хром,Тип поверхности плафонов и подвесок ... Цвет: черный . ...

... Space flight . ... On-line Data . ... a - defines the size of the orbit . ... i - defines the orientation of the orbit with respect to the Earth's equator . defines where the low point, perigee, of the orbit is with respect to the Earth's surface . ... defines where the satellite is within the orbit with respect to perigee . Info / On-line data: General description Position J-Track J-Track 3D Explanation . Info: Industry news On-line Data Company ATLAS news Events We in press Contact . ...

... Geocenter motion - this is vector offset of CF relative to CM. ... SCR TOPEX/ DORIS monthly solution on span 1993.0 - 2000.1, (http://sbgg.jpl.nasa.gov); 2 J (t ) = a0 + b0 t + A0 sin (t - t 0 ) + 0 , P A0 P - amplitude of the signal; - period ... ); - initial phase of the signal; - offset; - trend; - time; - arbitrary initial time (we take t0 - 1st January). 0 0 b0 t t0 X SOLUTION Span Annual A, mm IGN /JPL (w e e kly) Y Semiannual A, mm 1.0 ± 0.3 5.2 ± 0.4 15.5 ± 0.2 1.1 ± 0.5 1.5 ± ...

The best way to explain what the logical actors are, is to consider an example. ... An example of logical actors (the Actors.A program). ... The principle of logical actors. -- ------------------------------------------- project : (( 'Main' )) ------------------------------------------- class 'Main' specializing 'Dialog': -- identifier = "input" ; x = 27 ; y = 8 ; -- i; j; -- w1 = ( 'TextPage', value_1=i, value_2=j, text_color='White', background_color='Red', x= 9 , y= 4 ) ; . ...

The points are analogous to ones for the 4 th , 5 th , 6 th and 7 th Asian-Pacific Astronomy Olympiads . ... National Astronomy Olympic Committees and interested organizations are welcome to ask more about the 8 th APAO and in 2012 may form the teams for the 17 th IAO as well as for the 8 th APAO. The official APAO e-mail is a p a o [a] l i s t . ... Dr. Michael G. Gavrilov, Founding Chairman and Coordinator of the Asian-Pacific Astronomy Olympiad (APAO) . ... e-mail: gavrilov@issp.ac.ru . ...

. This is a new popup window - close it when you are done . Submitted by William Lee on 05/20/2007 15:17:03 . Quick Piggyback of Cygnus and Lyra . Vega is top center. Nikon D70 DSLR piggybacked on C8, 5 minute exposure with 5 minute dark frame, 22mm focal length (18-70mm zoom), F/8, ISO 800. Logon to post a follow-up comment or review comments from others . Copyright (c) Amateur Telescope Makers of Boston, Inc. About Us Contact Us

Russian version of HP . ... StarCalc is the fastest professional astronomy planetarium & star mapping program for Windows 9x/ME/NT/2000/XP (StarCalc version for PocketPC computers you can found here ). ... Extensibility : This program is based on common "Plugin StarCalc interface to catalogs and object groups", which allows program to add new modules as Plugins. ... Welcome to the Pocket StarCalc Home Page: . ... Some bugfixes in eclipses" and line" plugins - see the new versions in downloads page. ...

... Meade Instruments Corporation . ... Meade Pictor XT-Series CCD Autoguider/Imagers . ... Copy Copies the entire active image to the clipboard. ... Section 6: Image Menu . ... The two red sliders can be used to chop off parts of the image data(to eliminate anomalies, for example). ... This has prefilled out information about images taken with the Pictor XT208, and may have information about imported images (depending upon format). ... Copyright 2006 Meade Instruments Corporation, All Rights Reserved. ...

... 1 && GetHrefObj( gCurSld-1 ).mVis == 1 )|| ... GetNumSlds()) } function CloseWindow() { if( HideMenu() ) return ; var event = PPTSld.event; if( !IsFramesMode() event (event.keyCode==27 || event.keyCode==32 || event.type== click ) ) window.close( self ); CatchNumKeys( self, event ); } function Unload() { gIsEndShow=0; } function SetupEndShow() { gIsEndShow=1; PPTSld.document.body.scroll= no ; PPTSld.document.onkeypress=CloseWindow; PPTSld.document ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...