A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

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• Precession/nutation matrix. Explanations for Computer Ephemeris.

... This information may be for older NA2 filters?? Filters There are 7 filter positions, containing the following filters from Custom Scientific . ... 0 - Bessell R . ... The only filter requiring a focus offset is the ND2 + R filter which will be measured on the sky. ... The red filter attached to the ND2 in position 6 is not the same as the Bessell R. Number 6 is an RG610 red glass filter ( Rolyn 65.1355 ) for the 610 nm cut-on. ... Focus . ... Guider Mechanical Controller (filter and focus) . ...

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• TUI:Telescope:Coordinate Systems
• MILT Description
• lsst.coordConv: coordConv::PVT Class Reference

... They cover a period of 4 days in which the Supernova continues to rise in brightness (what astronomers call magntiude). ... First Image Taken on March 11 at 8:22 UT. Second Image Taken on March 12 at 8:52 UT. ... The supernova is the same brightness as in the previous image taken 2 hours ago . ... This image, taken 24 hours after the previous image, shows the supernova to be another 0.21mag (or about 25%) brighter. ... Hopefully the images do show that the brightness of the Supernova is changing. ...

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... ROBOTIC SPACECRAFT MISSION TO MARS. Brief description . ... Scientific goals . Scheme of the mission . Spacecraft . ... Payload of the Orbiter . ... Description of . the instruments . ... SPACECRAFT . The MARS-96 spacecraft was built using the PHOBOS type spacecraft, modified using knowledge and experience gained from the PHOBOS mission. ... launch mass . fuel mass . payload . ... data transmission rate . max 130 ebit/s . ... total mass . ... mass of payload . ...

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• Mars96
• The FSP ASCII file description
• The FSP plot description

The revision of the MASS/DIMM star catalogue N. Shatsky, V. Kornilov March 16, 2008 Abstract The compilation of the (updated) version of the MASS (MASS/DIMM) device target catalogue is described. ... Then the list was cleaned according to following criteria: I. Remove stars too faint for a MASS device. ... Here the color equation of the Sternb erg device was taken: M AS S mag = V mag + 0.45 (B - V ); stars with M AS S mag > 3.2 were removed. ... This was made based on the GCVS4.2 catalogue data. ...

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XEphem Forum Message . Forums: . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... Post . ... Re: Re: Filter Based On Catalogs? Forum List | ... Post Message | ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Re: Filter Based On Catalogs? - an Astronomy Net XEphem Forum Message
• Re:Suggestions For Light Pollution Filters Wanted - an Astronomy Net Eyepieces
• Re The Computer For Dob - an Astronomy Net Eyepieces Forum Message

RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...

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• RTT150 Technical Description
• Second Spectrum-RG/eROSITA Conference
• Дородницын Антон Владимирович (ИКИ РАН, GSFC)

... Lagoon Nebula, Trifid Nebula and the NGC 6559 Complex – Negative Image . This negative view of the previous image highlights the dark nebulas in the region. Same acquisition data as the previous image: 5nm Hydrogen-alpha filter, Total= 48 minutes, 8 x 360-second unbinned sub frames. Takahashi Epsilon -180 – f/2.8, SBIG STL6303E CCD camera, ATMoB Clubhouse, Westford, MA. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... America Returns to Space Flight . ... Hyperion: Sponge Moon of Saturn . ... Unusual Gas Filaments Surround Galaxy NGC 1275 . ... How were the unusual gas filaments surrounding galaxy NGC 1275 created? No one is sure. Galaxy NGC 1275 is the central dominant galaxy of the Perseus Cluster of Galaxies, a cluster with many member galaxies visible in the above image. In visible light, NGC 1275 appears to show a spectacular collision between two distinct galaxies. ... A frozen patch of water ice. ...

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... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

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• VISTA - Visible and Infrared Survey Telescope for Astronomy

Next: J.E. Chambers, Research Astronomer Up: Research Previous: W.M. Napier, Senior Research Contents . Dr John Butler has carried out activities in the following main areas: . ... Bag?, has started a project on the link between solar activity and cosmic rays on clouds and their possible influence on the Earth's mean temperature. ... The proceedings of the meeting were edited by C.J. Butler and J.G. Doyle and published by the Astronomical Society of the Pacific in their conference series. ...

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• EVOLUTION MODELS
• Sfit Control Language: Classified Listing
• Scattering of Irregular Satellite Groups

... Oleg V. Verkhodanov . ... The last few years have changed our view on the evolution of galaxies: the most distant galaxies (i.e. systems having stellar population) have been found at redshift z=6.68 (Chen H.-W., Lanzetta, K. M., Pascarelle, S. 1999, Nature, 398 , 586) and radio galaxy at z=5.19 (van Breugel W., De Breuck C., Stanford S. A., Stern D., Rottgering H., Miley G. 1999. astro-ph/9904272 ). ... Redshifts and age of stellar systems of distant radio galaxies from multicolour photometry data. ...

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• Description of SED models

... Meade Instruments Corporation . ... Meade Pictor 616A Color Filter System Instruction Manual . ... Remove the Meade Pictor 616A Color Filter System from the telescope or camera. Use the supplied hex wrench to remove the three screws from the telescope side of the Meade Pictor 616A Color Filter System. Position your Meade Pictor 616A Color Filter System to align with the diagram below. ... Carefully screw each filter into the wheel, and re-assemble the Meade Pictor 616A Color Filter System. ...

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• Coronado 5mm Blocking Filter - Blocking Filters - Coronado€о Solar - Products
• Coronado 10mm Blocking Filter - Blocking Filters - Coronado€о Solar - Products
• Coronado 30mm Blocking Filter - Straight through - Blocking Filters -

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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... On-line Data . ... The program enables to find out the exact present Earth coordinates of the international space station and "Shuttle". ... J-Track - this program is similar to the previous one, however it knows how to display images and orbits of space vehicles. ... NASA SkyWatch - a program for those, who are fond of watching artificial space objects through the telescope, field - glass or with the unaided eye. ... Info: Industry news On-line Data Company ATLAS news Events We in press Contact . ...

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• Project Space Hotel
• Plan and technical specifications of the Baikonur cosmodrome, Russia's space
• ATLAS aerospace invites you to get training experience as cosmonaut and

... The greater the distance, the smaller the parallax. ... That triangle has the same proportions as the much larger triangle ABC, and therefore, if the distance B'C to the thumb is 10 times the distance A'B' between the eyes, the distance AC to the far landmark is also 10 times the distance AB. ... The most distant objects our eyes can see are the stars, and they are very far indeed: light which moves at 300,000 kilometers (186,000 miles) per second, would take years, often many years, to reach them. ...

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• Geomagnetic Indices Kp, ap, Ap, Cp and C9
• INTERBALL-TAIL KP DESCRIPTION
• OMNIDIRECTIONAL PLASMA SENSOR VDP

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

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• Database of Optical Constants -- Level: welcome
• Polarization properties (transmitted radiation)
• AI SPbU library of scattering codes

Symbolic circuit-matrix processor and evaluator . ... This software is reliable over the range of benchmark circuit complexity (both *.CIR and *.MAT file). ... SYMBOL is a symbolic-algebra package which in contrast to REDUCE, MACSYMA, MAPLE, MATHEMATICA, MathLAB, MathCAD and other known multi-purpose systems is especially intended for analysis of any lumped, linear, time-invariant circuit. ... pure ASCII text . ... CIRSYM - SYMbolic CIRcuit processor used to format ASCII text file *.out for CALCSYM. ...

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... The words are numbered according to the reference mentioned above. ... 59 WORD wSecond ; // 0 .. 59 satellite tracking start time (GMT) float fStep ; // reserved WORD wMass ; // reserved BYTE reserved [12] ; // reserved WORD wExtraBytes ; // reserved } TRAJECTORYHEADER ; NOTE: the satellite tracking start time is a hardware operating start time to follow satellite. typedef struct { // ephemeris at satellite tracking start time double time ; // Epoch time (yyddd.ddddddddd)...

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• SMIS IKI RAN (Equipment)

... AMPLE (Adaptable Minor Planet Ephemerides) is integrated software package to deal with a number of problems concerning minor planets with the aid of IBM-type personal computer. ... compiling a list of all numbered minor planets which can be seen at certain moment within specified sky region and visualization of their mutual positions; . ... As AMPLE is able to reproduce virtually any table of "the Ephemerides of Minor Planets" , it may be considered as computer version of the EMP. ...

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• (Untitled)
• Keywords_70