... ASRAS HOME . Radio Astronomy . ... About ASRAS . ... Our Observing Site . ... 2015 Mees Tour Guides . ... We're offering Regular Tours (a presentation on astronomy geared to a general audience, followed by a tour of the observatory and (hopefully!) observing of several objects, which may include the Moon, planets, nebulae, star clusters and perhaps galaxies), and Kids' Tours (a more interactive presentation specially aimed at youngsters plus the observatory tour and observing) as in prior years. ...

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Estimates for the Set-theoretic Distance between Orbits of Celestial Bodies . ... It is reasonable to use preliminary simple criteria for the proximity to intersection based on estimates of set-theoretic distance ( , 0 ) between orbits , 0 of celestial bodies , 0 . ... We describe here two simple criteria and one more complicated one. ... The third one requires calculation of the distance itself and it amounts to solving a trigonometric equation of the 8-th degree. ...

... The relation between the metallicity of F stars and their loci on the c 1 , diagram is investigated for a semple 2000 galactic-disk F stars having uvby data. ... По данным uvby -фотометрии, для двух тысяч F-звезд диска Галактики изучена связь между их металличностью и положением на диаграмме c 1 , . ... Если считать, что распределение металличности звезд диска в диапазоне lg Z/Z (или [Fe/H]) от -0.5 до +0.3 непрерывно, то Y 0.02. ...

Next: GOCG Pre-Observation Products . Previous: RadioAstron Mission Element Overview . ... Observation Summary File (OSF) . GRT (Ground Radio Telescope) Schedule Files . ... How: The long-term schedulers will produce two files: GSTS-file (General Space Telescope Schedule) to be used by GOCG and LTS-file for all mission elements. ... What: The RSOG will produce schedule files for all GRTs participating in a particular observation, in the format required by each GRT. ...

... A Tail of Two Hemispheres . ... 1.02.2007 . ... Credit: S. Deiries ( ESO ), M. Fulle ( INAF ) Explanation: By January 19/20 Comet McNaught's magnificent dust tail stretched for about 150 million kilometers (~1 AU), requiring images from both southern and northern hemispheres of planet Earth to take it all in. ... Publications with keywords: Comet McNaught - comet tail - dust . Publications with words: Comet McNaught - comet tail - dust . ... The Trifid Nebula in Stars and Dust . ...

... The body of photometric and astrometric data on stars in the Milky Way Galaxy has been growing very fast in recent years (Hipparcos/Tycho, OGLE-3, 2-Mass, DENIS, UCAC2, SDSS, RAVE, Pan Starrs, Hermes, ...) and at the time of the General Assembly the launch of ESAтАЩs Gaia mission, which will measure astrometric data of unprecedented precision for ~ 10 9 stars, will be less than three years away. ... Producing models and fitting them to the available data will involve complex software. ...

Next: stecf.impol - Features Up: The ``stecf" IRAF Layered Previous: stecf.slitless - a Slitless . The impol package consists of five tasks to reduce, simulate and plot imaging linear polarimetry data taken with the HST instruments with polarizing facilities - currently FOC, NICMOS and WFPC2. ... Figure: An example of the output from stecf.impol showing polarization vectors plotted on an HST WFPC2 F673N filter image of the Homunculus nebula surrounding Carin?. љ . ... stecf.impol - Package Tasks . ...