... Abstract Find nearest point on a triaxial ellipsoid to a specified line, and the distance from the ellipsoid to the line. ... If linept is inside the ellipsoid, pnear will not necessarily be the closest point of intersection. dist is the distance of the line from the ellipsoid. ... If the line intersects the ellipsoid, dist is zero. ... Examples 1) We can find the distance between an instrument optic axis ray and the surface of a body modelled as a tri-axial ellipsoid using this routine. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

... casa::CompositeNumber . ... This class generates composite numbers. ... CompositeNumber (const uInt maxval=8192) . constructor: Note: if you later make a call with value > maxval, we will recalculate the list of composite numbers . ... nextLarger (const uInt value) . ... nextSmaller (const uInt value) . ... This class generates a list of composite numbers made up of powers of 2, 3, and 5, which are less than some max value and returns the smallest composite number greater than some number given. ...

Astronomy Picture of the Day . Closer To Beta Pic . ... Credit Copyright: S. R. Heap ( LASP / GSFC ), NASA Explanation: What did our Solar System look like as the planets were forming ? ... Beta Pic is surrounded by a disk of dust which we view nearly edge-on. The dust disk shines by reflected starlight and has been examined with ever increasing detail to search for signs of planetary formation. ... Publications with keywords: planetary system - circumstellar disk . ...

... 173Wall Peacock We catalogue the brightest extragalactic radio sources at 2.7 GHz. ... These data were originally presented in Wall and Peacock, MNRAS, 216, 173. The values in parenthesis include (units, datatype, example). 1 iauname Name of source in IAU convention (char7, example: '0320-37') . ... 3 ra_1950 rad Right ascension of source in radians (B1950) (real, example: 0.876068) . ... 9 alpha Spectral index of source between 2.7 and 5 GHz (real, example: 0.52) . ... Longair, 1975 . ...

... The schedule assigned id (example: AS05) for your observing program. ... Use the time you started using the telescope including when you started taking calibrations. The time you opened for on sky observations can be entered later in the activity log. UTC End Time: . ... Focus Log: . ... The focus position can be obtained under the Telescope column of the System Status in ACP or from the run log. ... When all fields are filled out press this button to email the log to the ARCSAT and community. ...

... Pages with info on individual constellations: . GPS . glonass . ... Global navigation satellite cause interference in the frequency range 1165 - 1300 Mhz. ... satellite . ... The compass (beidou-2) satellite is part of the global navigation satellite system for china. ... The dynamic spectra above shows some leakage near 1383 MHz and 28 seconds that looks like it is associated with the compass satellite transmission. ... The 10 MHz wide rfi seen at 1268.52 is the Chinese compass satellite. ...

... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

As the Universe expands, gravity pulls on the Universe, and slows the expansion down over time. As we look to great distances, we are looking back in time. If we can measure how fast the Universe is expanding in the past, and compare it to how fast it is expanding now, we can see the total gravitational effect of all matter in the Universe. Here we plot the distance between two galaxies as a function of time. ... Universes with lots of material . ...

... 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 ? ...

... High-resolution Near-infrared Study of the Deeply Embedded Young Stellar Object S140 IRS 3 . ... P22P We explore the structures immediately surrounding the high-mass young stellar object S140 IRS 3 within the L1204 molecular cloud. ... The S-shaped structure of this feature can be well reproduced by a model assuming a precessing outflow from IRS 3a. Furthermore, we find several elongated features pointing away from IRS 3 in a southern direction. ...

... NGC 1530 is one of the largest barred spiral galaxies in the northern sky, with bright CO emission. ... To trace molecular gas, we observed the line, with the IRAM Interferometer. ... Properties of NGC 1530 and observational results . ... Then in a frame rotating with the potential, the periodic orbits are ellipses either parallel to the bar ( ) or perpendicular ( ), depending on the radius of the orbit. ... We observed the molecular gas in the bar of NGC 1530, a barred SBb spiral in the line. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 October 27 . Close To Eros . Credit: NEAR Project , JHU APL , NASA . Explanation: Scroll right and fly close over asteroid Eros! ... The car-sized Near Shoemaker spacecraft is now on its way to a higher, more stable orbit about 200 kilometers above asteroid Eros . ... About APOD | ... NASA Technical Rep.: ...

Harvest Moon . ... The Harvest Moon refers to the Full Moon that comes closest to the autumnal equinox, or the first day of autumn. Depending on the year, the Harvest Moon can fall anywhere from two weeks before to two weeks after the equinox, which arrives annually on or near September 23. ... It was once common knowledge that at the vicinity of Full Moon, the Moon rises around sunset, shines all night long and sets around sunrise. ... Re-published on Astronomy Net with permission of the author. ...

... A Hidden object is used for passing name/value pairs when a form submits. ... JavaScript 1.0 . JavaScript 1.1: added type property The HTML INPUT tag, with "hidden" as the value of the TYPE attribute. ... Property . ... The form contains a "Display hidden value" button that the user can click to display the value of the Hidden object in an Alert dialog box. ... P><INPUT TYPE="button" VALUE="Display hidden value" NAME="button2" . ... Form name:<INPUT TYPE="hidden" NAME="h1" VALUE="Beluga"> . ...

Electronic Catalogue of Comets "Halley" . ... In this paper we give a description of the Electronic Catalogue of Comets "Halley", which makes it possible to calculate the evolution of the orbits of comets, to visualize orbital motion, to determine the circumstances of a comet's close approach to planets within a given time interval, as well as a number of other opportunities. ...

This example shows a difference between CSS's table model for HTML and for other document formats. The first, HTML, example is defined by HTML to be illegal, as it would lead to overlapping cells if HTML's rules for layout are followed. ... The diagram depicts how the two examples, the HTML one and the almost identical non-HTML one, might be rendered. ... The rendering of the non-HTML example is on the right, it follows the CSS rules and thus has no overlapping cells. ...

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

... Corrected geomagnetic coordinates | Let us consider as an example two numerical files with names tp.cng This files contain the information about INTERBALL Tail Probe and POLAR magnetic conjugations. ... The predicted magnetic conjugations correspond to the less then 5 deg geocentric angular distance between the footprints. ... dlt - the difference between two satellites corrected geomagnetic local times (on the second line), . ... GLAT (deg) - the satellite geographical latitude, . ...

Stellarium 0.12.3 . MainљPage . ... Classes . ... FileљStructure . ClassљList . ... Protected Member Functions | ... StelDialogLogBook Class Reference abstract . voidљ . ... virtual voidљ . ... Retranslate the content of the dialog. ... The main dialog. ... Definition at line 28 of file StelDialogLogBook.hpp . virtual void StelDialogLogBook::createDialogContent . protected pure virtual . ... virtual void StelDialogLogBook::languageChanged . ... QWidget* StelDialogLogBook::dialog . ...