fitcircle - find mean position and pole of best-fit great [or small] circle to points on a sphere. fitcircle [ xyfile ] -L norm [ -H [ nrec ] ] [ -S ] [ -V ] [ -: ] [ -bi [ s ][ n ] ] fitcircle reads lon,lat [or lat,lon] values from the first two columns on standard input [or xyfile ]. ... Then two locations are found: the mean of the input positions, and the pole to the great circle which best fits the input positions. ... If no file is specified, fitcircle will read from standard input. ...

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• http://xray.sai.msu.ru/~ivan/gmt/example03.html
• The COOC Criterion (Criterion of Observations versus Calculations)
• AXAF-Chandra

... After all we cannot send a probe to the star Altair to confirm that it is 17 light years away. ... The "Bessel determined that the star 61 Cygni was about ten light years away" Earth goes around the Sun in one year, so in six month it is in the opposite position in its orbit. ... In 1838 Bessel determined that the star 61 Cygni had a parallax of 0.314 arcseconds and therefore the star was about ten light years away (today the distance is more precisely measured to be 11.4 light years). ...

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Computer Ephemeris for 2014 from DE200/LE200. Longitude of central meridian of Saturn. ...

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• Central meridian positions for physical observations of Uranus for Computer
• Central meridian positions for physical observations of Neptune for Computer
• Explanations to ephemeris for physical observation of the planets for Computer

. To yank the the current sentence into the temporary buffer: y) . To yank the text from the present cursor position to the the beginning of the current paragraph into the temporary buffer: y{ . To place the contents of the temporary buffer after the current cursor position: p .

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• Examples of using the lpq command
• Example of removing special meaning from a metacharacter
• Defining the sort field

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

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• VISTA ETC - Exposure Time Calculator

... During the week from the 14th of June to the 18th of June I have been on work experience in the Armagh Observatory. During the course of these 5 days, the main task which I had been set was to, using the Faulkes Telescope in Hawaii and the Faulkes Telescope in Australia, capture images of various different asteroids, and afterwards measure their position. ... The near-Earth asteroid 2010 DW1, in images obtained on 2010 Jun 15 using the Faulkes Telescope North, operated by Las Cumbres Observatory. ...

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• First Observation of a Close Earth-Approaching Near-Earth Asteroid Using the
• Grubb 10 inch Refractor
• An Overview of the Coupled Earth-Sun System PPARC Introductory Solar System

... To mark coordinate net in plot, first select Plate in menu bar and then Coordinate net in drop-down menu. ... User has possibility to save plot of sky or to print it using standard means. To save the file select File item in menu bar and then Save As... in drop-down menu. ... To print plot of plate select File item in menu bar and then take advantage of options Print Preview , Print Setup , Print. ... To return to the list of centers click on x button in title bar. ...

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• NAA 2011-2012 (preface)
• NAA 2015-2016 (preface)
• NAA 2013-2014 (preface)

... As a result of BTA observations of 23 chemically peculiar stars with strong magnetic fields, it was found that in 22 of them the longitudinal magnetic field, measured from the hydrogen line cores are considerably lower (by about 1/3) than the value measured from metal lines in the same spectra. ... New approaches need to be developed in order to interpret the data. ... The Zeeman spectrum of a star with a strong magnetic field, 53 Cam. ...

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• IRAS01005+7910
• Observations Support Laboratory BTA
• Solar system sector, archive 2011

... Stone, R.C., and Harris, F.H. (2000), CCD Positions Determined in the International Celestial Reference Frame for the Outer Planets and Many of Their Satellites in 1995-1999 The Astronomical Journal, v. 119, p. 1985-1998. 2000AJ____119_1985S Stone, R.C. (2000) Positions for the outer planets and many of their satellites IV: FASTT observations taken in 1999-2000. ... Year of the moment of observation 2. ... Hour of right ascension (alpha, h) 8. ... Degree of declination (delta, deg) 11. ...

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• Data bases of Natural Satellites. Documentation. Sources
• jg0040
• jg0026

There is some interest concerning whether or not the Mars Global Surveyor Orbiter Camera (MOC) will observe the "Face on Mars" and other features in the Cydonia region on Mars. ... For those not familiar with the topic, several Viking images show features on the surface of Mars that, in the eyes of some people, resemble "faces," "pyramids," and other such "artifacts." ... But nothing can be done about the orbit spacing or the pointing control or the width of the MOC field of view. ... Mars Face . ...

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• The Wind Spacecraft
• Kepler and His Laws
• Optical instrumentation [Oulu]

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 March 30 . Beijing Ancient Observatory . ... Explanation: Did observatories exist before telescopes ? One example that still stands today is the Beijing Ancient Observatory in China . ... It is interesting to compare the above picture to one taken in 1895 . ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

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• Lighting plug-in
• GIMP animations: merge-anim example 5
• GIMP animations: merge-anim example 1

Allows you to specify a drift scan: motion at a constant velocity along a great circle. ... The path starts at the new object position (though the telescope actually intersects the path later, see Subtleties ). ... Note that the units are always /sec for both axes. ... The velocity along the path is 0.01 /sec. ... The path is assumed to start when you hit the Slew button (more precisely, when the TCC parses the command). However, it takes the telescope awhile to slew to meet the specified path. ...

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• Tilt and Sag Coefficients: 14 Apr 2000
• Astrophysical Research Consortium - Apache Point Observatory
• TUI:Tidbits:Entering Sexagesimal Positions

... The goal of this course is to introduce some -- very interesting -- basic examples and notions of combinatorial game theory, following the book "How to win your mathematical games", by Berlekamp, Conway and Guy. ... So, for every game there is a winning strategy, and to find one one can use the well-known idea of winning/losing positions. ... Temperature theory. We will see the limits of the association of numbers and games: some positions can not be associated to a single real number! ...

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• Arithmetic groups (Spring 1997)
• Introduction to dynamical systems (Spring 1999)

... Advises . Contact Advises . As an advise for amateurs we would like to underline: if it's possible, try to observe 3 asteroid positions per night and do not neglect to observe the Numbered Minor Planets in your telescope field of view as a "by product" of your observational programs. ... We think such estimations ought to be produced every morning after CCD observations of the moving celestial objects by observer himself. ...

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... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

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• Emission molecular bands
• Time Functions
• Dome position

... Another significant contribution to the crystal energy of metals is the electron-ion interaction or the electron bandstructure energy (E BS ) which is defined by the interaction of valence electrons and the Brillouin zone (BZ) planes. ... The program BRIZ has been developed for 3D visualization of Brillouin zone configurations and intersections of BZ planes with a Fermi sphere[4]. ... 1.75 (electrons/atom). ... 4] Degtyareva V.F., Smirnova I.S.: BRIZ: a vizualization program for Brillouin zone ? ...

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• Comet Observation Home Page (Chernogolovka)
• LHPP ISSP RAS
• V International Astronomy Olympiad, Problems to solve (in English)

. Multi-epoch observations of the ЮВ Pictoris b exoplanet. The planet was imaged in 2003 (left image) in the L' band (3.8 ЮМm) in the plane of the circumstellar disk surrounding the star (not seen here). It was detected again October 2009 (middle) when it had moved to the other side of the star. The new observations made March 2010 at 2.18 ЮМm are shown in the right panel. The planet has moved yet again relative to its position measured in 2009. Astronomy Astrophysics

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BF3EE98E8-790E-4CD2-8D95-0D93300B968D%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B057758EC-8CE7-457F-A58D-7B6DEF643344%7D
• Where is Deimos? | Astronomy.com

I/146 Positions and Proper Motions (Roeser+ 1988) ================================================================================ Catalogue of Positions and Proper Motions Roeser S., Bastian U. =1988A .. ... 449R ================================================================================ ADC_Keywords: Positional data; Proper motions Description: PPM North gives J2000 positions and proper motions of 181,731 stars north of -2.5 degrees declination. ... The mean epoch is near 1931. ...

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• Positions and Proper Motions - South
• Supplement to the PPM Star Catalogue

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

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• Worked Example 02
• Worked Example 04

... TelescopeClientDummy Class Reference . ... TelescopeClientDummy (const QString &name, const QString &) . ... isConnected (void) const . ... getJ2000EquatorialPos (const StelCore *) const . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getSideralPosGeometric (const StelCore *core) const . ... getSideralPosApparent (const StelCore *core) const . ...

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• Stellarium: gSatTEME Class Reference
• Stellarium: Position Struct Reference
• Stellarium: ScreenImage Class Reference